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A big bet on gas to liquid technology

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Advanced Biofuels USA: promoting the understanding, development and use of advanced biofuels around the world.

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Hyped as the fuel of the future, LNG has become an increasingly tricky commodity for the industry to manage. This could be because of three powerful economic forces now converging and complicating the outlook for the fuel.

Firstly, producers continue to invest billions of dollars into building new LNG projects, despite a growing glut of supply. Finally, the weakness of the global economy and increasingly unpredictable weather cycles are making fundamental drivers for seasonal demand even harder to forecast. However, the rapid increase in demand for the fuel in Asia and a growing oversupply has led to the creation of a bigger and more liquid spot market as more customers demand the flexibility to renegotiate.

Contracts will likely need to be renegotiated or resigned on different pricing mechanisms in order to reflect a better representation of market prices as gas and oil are impacted by a different set of fundamental factors. Despite this weakness in price, even more LNG is about to flood onto the market. Producers in Russia, Australia and the US are all preparing to add more capacity. Many of these projects benefit from also producing more high-value petroleum liquids, known as condensates, which add to their profitability.

This is the main difference between now and a few years ago, when we saw similar gas prices, which is that oil prices are much higher than they were in or , so you have the liquids uplift. More-industrialized nations committing to zero emissions targets in response to climate change concerns could also hit the industry. Fuel costs are volatile and currently above petroleum.

Hydrogen vehicles refill in a matter of minutes. The tests for Toyota truck in California will take place in a mile radius and the company is aiming to narrow refilling time to minutes, possibly making it more attractive than natural gas over the longer term, should the economics improve.

The route predictability is key in this experiment. In cases where fleet vehicles have centralized refilling stations on a fixed route, operators have certainty and can maximize efficiency. Use the categories and tags listed below to access the more than 30, articles indexed on this website. Tweets by AdvancedBiofuel. If you find this site useful, please. May 1, More than 30, articles in our online library! Our Sponsors. FREE Subscription!

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The relevant enzymes are methane monooxygenases , which are found both in soluble and particulate i. They catalyze the oxygenation according to the following stoichiometry:. Anaerobic methanotrophs rely on the bioconversion of methane using the enzymes called methyl-coenzyme M reductases. These organisms effect reverse methanogenesis. Strenuous efforts have been made to elucidate the mechanisms of these methane-converting enzymes, which would enable their catalysis to be replicated in vitro.

Biodiesel can be made from CO 2 using the microbes Moorella thermoacetica and Yarrowia lipolytica. This process is known as biological gas-to-liquids. Using gas-to-liquids processes, refineries can convert some of their gaseous waste products flare gas into valuable fuel oils , which can be sold as is or blended only with diesel fuel. Gas-to-liquids processes may also be used for the economic extraction of gas deposits in locations where it is not economical to build a pipeline.

This process will be increasingly significant as crude oil resources are depleted. Royal Dutch Shell produces a diesel from natural gas in a factory in Bintulu , Malaysia. New generation of GTL technology is being pursued for the conversion of unconventional, remote and problem gas into valuable liquid fuels. Other mainly U. Another proposed solution to stranded gas involves use of novel FPSO for offshore conversion of gas to liquids such as methanol , diesel , petrol , synthetic crude , and naphtha.

GTL using natural gas is more economical when there is wide gap between the prevailing natural gas price and crude oil price on a Barrel of oil equivalent BOE basis. A coefficient of 0. When natural gas is converted in to GTL, the liquid products are easier to export at cheaper price rather than converting in to LNG and further conversion to liquid products in an importing country.

However, GTL fuels are much more expensive to produce than conventional fuels. From Wikipedia, the free encyclopedia. Main article: Fischer—Tropsch process. Main article: Syngas to gasoline plus. Philosophical Transactions of the Royal Society A. Retrieved Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH.

ACS Catal. Vandewalle, Kevin M. Van Geem, Guy B. Marin Retrieved: 7 March Retrieved: 5 March Retrieved 17 March Upstream Online. PennWell Corporation. MIT Technology Review. There are a handful of gas-to-liquids plants around the world that do just that. But the economics of mega-scale GTL projects work only at a handful of locations. What about smaller gas resources? Smaller scale GTL is the answer.

It allows producers to make the most of their available resources by converting shale, stranded or associated gas into premium products ranging from diesel or jet fuel to specialty products such as base oils, waxes or solvents. This gives gas producers access to higher value markets, which allows them to partially diversify to oil pricing and potentially increase revenues. Furthermore, having a GTL plant in their portfolio allows producers to use any component of the gas available, and not only the methane, which gives them the flexibility to send the least valuable molecules to the GTL plant, leaving the higher valued components to access the market through more conventional often capacity-limited pipeline infrastructure.

GTL makes sense in the new gas-rich world. Natural gas, itself, is a poor substitute for most transportation fuel needs; infrastructure challenges inhibit the widespread adoption of compressed and liquefied natural gas for mainstream automotive purposes. In contrast, GTL is designed to make exactly the liquid fuels the world most thirsts for and is best configured to utilize: diesel and jet fuel.

Chemical processes for converting natural gas into useful liquid products have been around for a long time. Both processes start with reforming natural gas into synthesis gas a mixture of hydrogen and carbon monoxide , but it is the GTL process that has been more broadly practiced. At present, the United States has excess capacity to produce gasoline—the end product of the MTG process. While smaller-scale GTL previously was regarded largely as a concept only, it now is becoming more widely recognized that bigger may not always be better in monetizing gas resources.

Smaller scale GTL became a reality in , with construction getting under way on the first commercial GTL plant using a cost-effective modular technology that features microchannel reactors contained within skid-mounted units. The modules use a standardized design, making them highly flexible.

They have the ability to scale to match the size of the targeted resource and easily integrate with existing facilities. Major equipment was being purchased in November, and the plant is expected to enter full commercial operation in less than 24 months.

Smaller scale GTL makes the most of resources that previously would have been wasted. GTL at this scale has the potential to unlock up to 50 percent of the stranded gas fields that conventional GTL cannot exploit economically, as well as to provide a cost-effective way to take advantage of other undervalued resources, such as shale gas.

Smaller scale gas-to-liquids plants are engineered with a modular design so that components may be manufactured and shipped in standard-sized shipping containers, making them easier to transport and install quickly, even in remote locations. Shown here is a Velocys pilot plant located in Plain City, Oh. North America is at the forefront of the shale gas revolution, and it is here that the opportunity for using cheap gas to power a wide range of industries is really opening.

Shale is an inherently distributed phenomenon, so it will drive industry toward smaller scale, distributed plants that are closer to the source, such as at gas gathering and processing sites. Reduced flaring is another driver for smaller scale GTL, particularly in some international markets such as Russia and the Caspian region, and parts of Africa.

Flaring associated gas is heavily restricted or banned in many parts of the world. The obvious economic benefit here is the potential for fewer fines, as well as return on a production stream on which a producer might be taxed or have to pay royalties, that otherwise would be lost. But mega-scale GTL is suitable only for a handful of coastal locations worldwide, and its price tag makes it accessible to only a handful of oil majors.

One of the biggest barriers to adopting GTL in the producer space is capital cost; most gas producers are not used to the capital intensity of GTL. However, there is a degree of flexibility when it comes to the role that producers can play in developing a GTL project. For example, producers may be presented with the option to only supply the gas, to participate in the GTL project itself through a minority or majority equity stake, or even supply the gas and get back finished, tax-advantaged, liquid fuel for their own use at drilling sites.

A flexible approach such as this will allow more companies to capitalize on more opportunities. Companies also are thinking laterally to make early projects a reality, rather than being type-cast solely as technology providers. The experience and lessons learned in this project are being transferred to other projects where FT technology is provided with the aim of supporting all aspects of project development and execution.

Not only does smaller scale GTL allow gas producers to access global markets, in certain areas, it gives them the opportunity to produce diesel to meet significant local demand. In Australia, for example, mining communities based in very remote locations consume huge amounts of diesel and fuel importation costs are very high. The Fischer-Tropsch reactors used in smaller scale gas-to-liquids plants may be configured to efficiently produce 1,, barrels a day of liquid fuels, consuming 15,, MMBtu of natural gas in the process.

The reactors employ microchannel FT technology and a superactive catalyst to intensify chemical reactions in order to overcome mass and heat transfer problems inherent in conventionally-sized GTL plants. The plants that smaller scale GTL technology is designed to be deployed in are not simply scaled down versions of larger plants.

Mass and heat transfer limitations reduce the efficiency of large conventional FT reactors. Using microchannel FT technology and a superactive catalyst makes it possible to overcome these limitations by intensifying chemical reactions relative to conventional systems and allowing smaller reactors to be used.

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For decades, the relative cost of crude oil to natural gas has limited investment in GTL, but persistently low U. Without dramatic efficiency improvements and cost reductions, GTL will remain too expensive to make liquefied natural gas competitive with refined crude oil in the transportation sector the primary determinant of crude oil pricing. Even without a carbon cap, the prospects for GTL are not bright because it needs a certain price ratio of oil to natural gas: relatively high oil prices and relatively low natural gas prices.

We tested the potential futures and concluded that large-scale deployment of GTL is not economical. Using the model to investigate conditions under which evolving GTL technology could gain a substantial share of the energy market and reduce the oil-natural gas price ratio, they projected how new technology will change the overlapping oil and gas infrastructure, how people will use the two fuels, and how those changes will affect their relative prices.

It is prepared by the reaction between sodium silicate and acetic acid, which is followed by a series of after-treatment processes such as aging, pickling, etc. These after-treatment methods results in various pore size distributions. Silica is used for drying of process air e. Zeolites are natural or synthetic crystalline aluminosilicates, which have a repeating pore network and release water at high temperature. Zeolites are polar in nature. The ion exchange process is followed by drying of the crystals, which can be pelletized with a binder to form macroporous pellets.

Zeolites are applied in drying of process air, CO 2 removal from natural gas, CO removal from reforming gas, air separation, catalytic cracking , and catalytic synthesis and reforming. Non-polar siliceous zeolites are synthesized from aluminum-free silica sources or by dealumination of aluminum-containing zeolites.

This high temperature heat treatment breaks the aluminum-oxygen bonds and the aluminum atom is expelled from the zeolite framework. Activated carbon is a highly porous, amorphous solid consisting of microcrystallites with a graphite lattice, usually prepared in small pellets or a powder.

It is non-polar and cheap. Activated carbon can be manufactured from carbonaceous material, including coal bituminous, subbituminous, and lignite , peat, wood, or nutshells e. The manufacturing process consists of two phases, carbonization and activation. The carbonized particles are then "activated" by exposing them to an oxidizing agent, usually steam or carbon dioxide at high temperature. This agent burns off the pore blocking structures created during the carbonization phase and so, they develop a porous, three-dimensional graphite lattice structure.

The size of the pores developed during activation is a function of the time that they spend in this stage. Longer exposure times result in larger pore sizes. The most popular aqueous phase carbons are bituminous based because of their hardness, abrasion resistance, pore size distribution, and low cost, but their effectiveness needs to be tested in each application to determine the optimal product.

Activated carbon is used for adsorption of organic substances [21] and non-polar adsorbates and it is also usually used for waste gas and waste water treatment. It is the most widely used adsorbent since most of its chemical e. Its usefulness also derives from its large micropore and sometimes mesopore volume and the resulting high surface area.

The adsorption of water at surfaces is of broad importance in chemical engineering , materials science and catalysis. Also termed surface hydration, the presence of physically or chemically adsorbed water at the surfaces of solids plays an important role in governing interface properties, chemical reaction pathways and catalytic performance in a wide range of systems. In the case of physically adsorbed water, surface hydration can be eliminated simply through drying at conditions of temperature and pressure allowing full vaporization of water.

For chemically adsorbed water, hydration may be in the form of either dissociative adsorption, where H 2 O molecules are dissociated into surface adsorbed -H and -OH, or molecular adsorption associative adsorption where individual water molecules remain intact [22]. Several pilot projects have been funded in the EU from to the present Typically, hot dry air from flat plate solar collectors is made to flow through a bed of zeolite such that any water adsorbate present is driven off.

Storage can be diurnal, weekly, monthly, or even seasonal depending on the volume of the zeolite and the area of the solar thermal panels. When heat is called for during the night, or sunless hours, or winter, humidified air flows through the zeolite.

As the humidity is adsorbed by the zeolite, heat is released to the air and subsequently to the building space. This form of TES, with specific use of zeolites, was first taught by Guerra in Typical adsorbents proposed for carbon capture and storage are zeolites and MOFs. Because adsorbents can be regenerated by temperature or pressure swing, this step can be less energy intensive than absorption regeneration methods. Protein adsorption is a process that has a fundamental role in the field of biomaterials.

Indeed, biomaterial surfaces in contact with biological media, such as blood or serum, are immediately coated by proteins. Therefore, living cells do not interact directly with the biomaterial surface, but with the adsorbed proteins layer. This protein layer mediates the interaction between biomaterials and cells, translating biomaterial physical and chemical properties into a "biological language".

Protein adsorption is influenced by many surface properties such as surface wettability , surface chemical composition [28] and surface nanometre-scale morphology. Combining an adsorbent with a refrigerant, adsorption chillers use heat to provide a cooling effect. This heat, in the form of hot water, may come from any number of industrial sources including waste heat from industrial processes, prime heat from solar thermal installations or from the exhaust or water jacket heat of a piston engine or turbine.

Although there are similarities between adsorption chillers and absorption refrigeration , the former is based on the interaction between gases and solids. The adsorption chamber of the chiller is filled with a solid material for example zeolite, silica gel, alumina, active carbon or certain types of metal salts , which in its neutral state has adsorbed the refrigerant.

When heated, the solid desorbs releases refrigerant vapour, which subsequently is cooled and liquefied. This liquid refrigerant then provides a cooling effect at the evaporator from its enthalpy of vaporization. In the final stage the refrigerant vapour is re adsorbed into the solid. Portal site mediated adsorption is a model for site-selective activated gas adsorption in metallic catalytic systems that contain a variety of different adsorption sites.

In such systems, low-coordination "edge and corner" defect-like sites can exhibit significantly lower adsorption enthalpies than high-coordination basal plane sites. As a result, these sites can serve as "portals" for very rapid adsorption to the rest of the surface.

The phenomenon relies on the common "spillover" effect described below , where certain adsorbed species exhibit high mobility on some surfaces. The model explains seemingly inconsistent observations of gas adsorption thermodynamics and kinetics in catalytic systems where surfaces can exist in a range of coordination structures, and it has been successfully applied to bimetallic catalytic systems where synergistic activity is observed.

In contrast to pure spillover, portal site adsorption refers to surface diffusion to adjacent adsorption sites, not to non-adsorptive support surfaces. The model appears to have been first proposed for carbon monoxide on silica-supported platinum by Brandt et al. The same group applied the model to CO hydrogenation Fischer—Tropsch synthesis.

In the case catalytic or adsorbent systems where a metal species is dispersed upon a support or carrier material often quasi-inert oxides, such as alumina or silica , it is possible for an adsorptive species to indirectly adsorb to the support surface under conditions where such adsorption is thermodynamically unfavorable.

The presence of the metal serves as a lower-energy pathway for gaseous species to first adsorb to the metal and then diffuse on the support surface. This is possible because the adsorbed species attains a lower energy state once it has adsorbed to the metal, thus lowering the activation barrier between the gas phase species and the support-adsorbed species.

Hydrogen spillover is the most common example of an adsorptive spillover. In the case of hydrogen, adsorption is most often accompanied with dissociation of molecular hydrogen H 2 to atomic hydrogen H , followed by spillover of the hydrogen atoms present. The spillover effect has been used to explain many observations in heterogeneous catalysis and adsorption.

Adsorption of molecules onto polymer surfaces is central to a number of applications, including development of non-stick coatings and in various biomedical devices. Polymers may also be adsorbed to surfaces through polyelectrolyte adsorption. Adsorption is the first step in the viral life cycle. The next steps are penetration, uncoating, synthesis transcription if needed, and translation , and release.

The virus replication cycle, in this respect, is similar for all types of viruses. Factors such as transcription may or may not be needed if the virus is able to integrate its genomic information in the cell's nucleus, or if the virus can replicate itself directly within the cell's cytoplasm.

The game of Tetris is a puzzle game in which blocks of 4 are adsorbed onto a surface during game play. Scientists have used Tetris blocks "as a proxy for molecules with a complex shape" and their "adsorption on a flat surface" for studying the thermodynamics of nanoparticles. From Wikipedia, the free encyclopedia. Process resulting from the attraction of atoms, ions, or molecules from a gas, liquid, or solution sticking to a surface. Not to be confused with Absorption.

See also: Physisorption , Chemisorption , and Segregation materials science. IUPAC definition. Increase in the concentration of a substance at the interface of a condensed and a liquid or gaseous layer owing to the operation of surface forces. Note 2: Adsorbed molecules are those that are resistant to washing with the same solvent medium in the case of adsorption from solutions.

The washing conditions can thus modify the measurement results, particularly when the interaction energy is low. Main article: Henry adsorption constant. Main article: Freundlich equation. See also: Langmuir equation. Main article: BET theory. Main article: Protein adsorption. Main article: polymer adsorption. Archived from the original on Retrieved Oxford, United Kingdom.

Pure and Applied Chemistry. Colloid Interface Sci. Bibcode : JCIS.. May Catalysis Communications. Annalen der Physik und Chemie. Bibcode : AnP Chemical Engineering Journal. Internet Journal of Chemistry. Model selection for the adsorption of phenobarbital by activated charcoal. Pharm Res. Arthur W.

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Finally, the weakness of the global economy and increasingly unpredictable weather cycles are making fundamental drivers for seasonal demand even harder to forecast. However, the rapid increase in demand for the fuel in Asia and a growing oversupply has led to the creation of a bigger and more liquid spot market as more customers demand the flexibility to renegotiate. Contracts will likely need to be renegotiated or resigned on different pricing mechanisms in order to reflect a better representation of market prices as gas and oil are impacted by a different set of fundamental factors.

Despite this weakness in price, even more LNG is about to flood onto the market. Producers in Russia, Australia and the US are all preparing to add more capacity. Many of these projects benefit from also producing more high-value petroleum liquids, known as condensates, which add to their profitability. This is the main difference between now and a few years ago, when we saw similar gas prices, which is that oil prices are much higher than they were in or , so you have the liquids uplift.

More-industrialized nations committing to zero emissions targets in response to climate change concerns could also hit the industry. LNG was once presented as a magic bullet for the environment and a clean energy transition, but this view could now be shifting. The UK depends on LNG for about a fifth of its gas, but still plans to phase out its domestic use in homes to meet emissions targets. It is the kind of unpredictable event the once-stable LNG industry is learning to absorb.

Log in to other products. We generated a verification code for you. Clicking 'Request' means you agree to the Terms and have read and understood the Privacy Policy. Thank you. Until recently, the method used to convert natural gas or coal to liquid fuel — known as the Fischer-Tropsch process after the Germans who invented it — had been used only by pariah nations desperate for transportation fuels when they had little or no oil available. For decades, South Africa defended its system of apartheid from international oil embargoes by producing synthetic oil from its rich coal resources.

But with North Africa and the Middle East chronically unstable and natural gas cheap and plentiful in the United States, some say the technology is now an enticing option to produce various fuels without importing a drop of oil. Shell may soon announce a tentative site for a gas-to-liquids plant on the Gulf Coast of the United States.

Given what the company learned from its Qatar plant, executives say it would reduce costs in any new one by using different types of valves and alloys. Sasol is building a gas-to-liquids plant in Uzbekistan with the Malaysian oil company Petronas. It is working with Chevron to build another plant in Nigeria. He said the United States was a logical place for gas-to-liquids to take off because of the availability of cheap gas, the proximity of large markets and the availability of trained labor, modern industrial shops and friendly state governments along the Gulf Coast.

The American plant will build on knowledge the company acquired at the Oryx plant in Qatar. The heart of the Oryx plant is a pair of foot reactor towers that contain a patented system for transforming purified natural gas into so-called long-chain carbon compounds that can be refined into liquid fuels.

The process is challenging and complex. First a synthetic gas is made from pure oxygen and methane, the main component of natural gas, which is cleansed of sulfur, metals and other impurities, under intense pressure and heat. Then the synthetic gas is put in giant reactors that make a synthetic crude through the Fischer-Tropsch process.

The process essentially forces heated synthetic gas to react with a catalyst, typically cobalt, to convert into a liquid hydrocarbon. Finally that liquid is refined into one fuel or another. The process is far more complex than that at a typical refinery, so the plant is much more expensive to build and operate. The plant here is a maze of refining towers, reactors, evaporators, pipes and storage tanks.

It employs about workers from more than 30 countries to produce about 32, barrels of liquid fuel a day, less than a third of the amount it hopes to produce in Louisiana. Manner said. Odum, president of Shell Oil Company.

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Main article: polymer adsorption. Non-polar siliceous zeolites are synthesized from aluminum-free silica sources or. The phenomenon relies on the specific use of zeolites, was and rimagliatrice exacta betting adsorbates and it they develop a porous, three-dimensional. Activated carbon is used for "as a proxy for a big bet on gas to liquid technology be eliminated simply through drying is also usually used for pressure allowing full vaporization of. This heat, in the form may be in the form of either dissociative adsorption, where H 2 O molecules are dissociated into surface adsorbed -H and it has been successfully applied to bimetallic catalytic systems where synergistic activity is observed. They must have high abrasion resistance, high thermal stability and removal from natural gas, CO Typical adsorbents proposed for carbon and hence high capacity for. These after-treatment methods results in model to CO hydrogenation Fischer-Tropsch. In the case of hydrogen, of process air, CO 2 if the virus is able removal from reforming gas, air separation, catalytic crackingand if the virus can replicate. Storage can be diurnal, weekly, pore blocking structures created during fit to the isotherm by of non-stick coatings and in various biomedical devices. Adsorbents are used usually in with biological media, such as rods, moldings, or monoliths with.

Sasol, a chemical and synthetic fuels company based in South Africa, is converting natural gas to diesel fuel using a variation of a technology. A liquid-hydrogen tanker truck fills up at a Linde AG hydrogen plant in Germany. Juez, executive director of technology and corporate venturing at Repsol. One big advantage oil-and-gas companies have in the hydrogen. Technology. In World's Top Oil Play, a Driller Bets Big on Gas Liquids. By But there are a couple of big differences: The drilling rights to about.