Watergas shift reaction industrial process britannica. Role of watergasshift reaction in fischertropsch synthesis. Douglas falleiros barbosa lima, fernando ademar zanella, marcelo kaminski lenzi and papa matar ndiaye march 28th 2012. Development of nimoal2o3 catalyst for reverse water gas shift rwgs reaction. Modeling and simulation of water gas shift reactor. Onestage process for water gas shift in a pdbased membrane. Madeira, for giving me the greatest opportunity to participate in this field of research, for his.
Rwgs uses carbon dioxide and hydrogen as reactants to produce oxygen and carbon monoxide with a copper on alumina catalyst. The wgs reactor currently represents the largest volume of any catalyst in a fuel processor due to the slow. These reactors provide enough residence time for the reaction to take place with satisfactory conversion. The reverse water gas shift rwgs process is a candidate technology for water and oxygen production on mars. Co2 conversion by reverse water gas shift catalysis. Co2selective water gas shift membrane reactor for fuel cell. C, a cufeoxidecroxide based catalyst sk2012 is used. The water gas shift technology reduces co concentration in the reformate stream to 0. High temperature water gas shift hts for the high temperature water gas shift reaction, typically performed at 320450. Design and development of biogas reactor for farmer group scale teguh wikan widodo, ahmad asari, ana n. The catalytic activity and product distribution depend strongly on reaction temperature, pressure, space velocity and the molar. The rwgs reaction was first observed by carl bosch and wilhelm wild in. Study of the reverse water gas shift and dryreforming reactions conditions in a fixed bed reactor at most, to a ring of fou r times the radius of the metallic particles.
Zeolite membrane reactor for water gas shift reaction for hydrogen production jerry y. The linde isothermal shift reactor isr the linde isothermal shift reactor isr is used for the coshift reaction and allows conversion to below 0. While it has been discussed as a potential technique for mars life support and propellant manufacture in the literature, there has been no experimental work done to demonstrate its viability for such applications to date. Amos national renewable energy laboratory 1617 cole boulevard golden, colorado 8040393 nrel is a u. Water gas shift in applications where scrubbed syngas hydrogencarbon monoxide h2co ratio must be increasedadjusted to meet downstream process requirements, the syngas is passed through a multistage, fixedbed reactor containing shift catalysts to convert co and water into additional h2 and carbon dioxide co2 according to the following reaction known as the watergas shift wgs reaction. Pcis water gas shift and prox technologies developed under nsf, navy and internal programs have demonstrated highly selective conversion of co in an extremely small package. Our group is the first one to explain the negative effect of cu observed in the water gas shift reaction. Eric grol, netl wenching yang, research and development solutions, llc saic. The kinetics of simultaneous methanol synthesis and reverse watergas shift from co2h2and co2coh2mixtures have been measured at low conversions over a.
The reverse water gas shift reaction rwgs reaction was discovered in the 19th century as a method of producing water from carbon dioxide and hydrogen, with carbon monoxide as a side product. Two commonly used reactors are the cstr continuous stirred tank reactor and the pfr plug flow reactor. Reverse water gas shift reaction over supported cuni. Kinetic study of high temperature water gas shift reaction. Depending on the reaction conditions, the equilibrium for the water gas shift. In the carbon based hydrogen production, water gas shift reaction wgsr is the intermediate step used for. One possible way to shift towards a more sustainable future is to use co 2 as the main carbon source instead of fossil fuels. It is important to ensure that the equipment specified will be capable of achieving the desired yields and selectivity. The carbon dioxide is removed by dissolving it in water at a pressure of about ten atmospheres. This would be huge news, it would present serious competition to the leading audi process in the race to implement a co2tofuel technology to enable an energy revolution and resolve greenhouse gas climate change. Catalytic reverse water gas shift reaction was conducted in an electric field denoted as erwgs over various catalysts at low temperature as 423 k.
In particular, various reaction conditions as well as key process variables such as feed temperature. Watergasshift wgs reaction plays a significant role in industrial application of fischertropsch synthesis fts for coaltoliquid ctl processes with ironbased catalysts. Nov 08, 2007 this work analyzes the water gas shift reactor design as component of the co cleanup system of the ethanol processor for h 2 production applied to pem fuel cells. In comparison with the reaction of co2 alone, hydrogen can significantly promote the co formation in the rwgs reaction. Reactors jordan university of science and technology. Process intensification with integrated watergasshift. Average yield of co for the reverse water gas shift reaction at 1atm, p h2 p co2 1 kpa, balance he, ghsv 282000 h1, 50 mg of cu x ni 1x. Its purpose is to produce hydrogen and to reduce the level of co for final cleanup by preferential oxidation.
Modeling and simulation of watergas shift reactors. Experimental and modeling work ii abstract the main goal of this work was to perform the experimental study of a watergas shift wgs reaction and produced hydrogen separation unit using a pd membrane. However, bubbling a gas through a liquid may serve just. In the case of a lightassisted process that converts co2 and h2o to fuel, the water question is frequently asked. Department of energy laboratory operated by midwest research institute battelle contract no. Hydrogenselective membranes for highpressure hydrogen separation. Low temperature catalytic reverse water gas shift reaction. The formate derived from association of h2 and co2 is proposed to be the. Pdf modeling and simulation of water gas shift reactor. Then it was promoted with ni ions to produce nimoal2o3 catalyst. Sep 19, 2016 palladiumbased catalytic membrane reactors cmrs effectively remove h 2 to induce higher conversions in methane steam reforming msr and water gas shift reactions wgs. Hi,i need to design a water gas shift reactor as part of my design project. Reactors are usually designed based on rate considerations. Evaluation of alternate water gas shift configurations for.
Water gas shift, hydrogen purification, low temperature shift, high temperature shift flowsheets. Hydrogen production from the lowtemperature watergas shift reaction. The presence of high concentration of carbon dioxide can lead to reverse water gas shift. An industrial case, petrochemicals, vivek patel, intechopen, doi. Reverse water gas shift chemical looping for syngas production from co 2 dissertation. Reactor design is a vital step in the overall design of a process. Lin, henk verweij, peter smirniotis and junhang dong. In a batch reactor, the reagents are added together and. With the high demand for clean fuel and the critical role of the water gas shift reaction in hydrogen fuel cells, the development of water gas shift catalysts for the application in fuel cell technology is an area of current research interest. Packed bed membrane reactor for the watergas shift reaction. Analysis of design variables for watergasshift reactors. Co2 conversion by reverse water gas shift catalysis nsfpar. This presentation does not contain any proprietary, confidential, or otherwise restricted information. Each set of catalysts was tested using the reverse water gas shift, rwgs, reaction under atmospheric pressure and at temperatures ranging from 400c700c.
Reverse flow reactor operationfor control of catalyst surface coverage citation for published version apa. Introduction a watergasshift wgs reactor for the conversion of carbon monoxide co and water to. In a gassolid catalytic reactor, the reaction takes place on the surface of the solid and is thus heterogeneous. Complete the proofofconcept demonstration using the lab membrane reactor. Kinetics and catalysis of the watergasshift reaction. The reverse water gas shift process rwgs for water and oxygen. Reverse watergas shift chemical looping for syngas. Development of nimoal2o3 catalyst for reverse water gas. Reverse flow reactor operationfor control of catalyst. Copper based medium temperature water gas shift catalyst. Development of novel water gasshift membrane reactor.
Study of the reverse watergas shift and dryreforming reactions conditions in a fixed bed reactor at most, to a ring of fou r times the radius of the metallic particles. Water gas shift in applications where scrubbed syngas hydrogencarbon monoxide h2co ratio must be increasedadjusted to meet downstream process requirements, the syngas is passed through a multistage, fixedbed reactor containing shift catalysts to convert co and water into additional h2 and carbon dioxide co2 according to the following reaction known as the water gas shift wgs reaction. Conduct forward watergas shift using a membrane reactor at favorable conditions accomplishments conducted firstever high temperature and high pressure reverse wgs reaction kinetics study determined catalytic effect of reactor shell material on wgs reaction conducted cfd simulations to determine effect of reactor geometry on. In particular, emissions resulting from the use of hydrogen as fuel contain only water, one of the reasons why that.
Within such a context, this work evaluates the technical performance of a novel cmr, which utilizes two catalysts in series, rather than one. A water gas shift wgs membrane reactor mr has been constructed using a mfitype zeolite disk membrane packed with a ceriumdoped ferrite catalyst. Hydrogen flux and selectivity through membrane durability of membrane in extreme environments. Index termsgasification, thermodynamic modeling, supercritical water, watergas shift reaction i. Palladiumbased catalytic membrane reactors cmrs effectively remove h 2 to induce higher conversions in methane steam reforming msr and watergasshift reactions wgs. We explained this negative effect of cu by using several techniques.
Introduction the worlds progression towards the hydrogen economy is facilitating the production of hydrogen from various resources. Reverse flow reactor operationfor control of catalyst surface coverage. Biological watergas shift conversion of carbon monoxide. Race for a co2tofuel technology advanced science news. Development of novel water gas shift membrane reactor addressing barrier l. Biological watergas shift conversion of carbon monoxide to hydrogen milestone completion report wade a. Hydrogen production from the lowtemperature watergas. Hi, im studying on the water gas shift reaction and i need to following article.
The funders had no role in the design of the study. For special process design, it can be advantageous to combine these two steps to form one isothermal or adiabatic step called medium temperature shift mts. Design of water gas shift reactors posted in student. Water gas shift welcome to sudchemie india pvt ltd. Reverse water gas shift reaction is endothermic and. Packed bed membrane reactor for the water gas shift reaction. A fixed bed and a fluidized bed reactor design for the reverse watergas shift chemical looping rwgscl process with 80wt% fe2o3.
Pilot water gas shift membrane device for hydrogen from coal tom barton western research institute 511. In a batch reactor, the reagents are added together and allowed to react for a given amount of time. Design of water gas shift converter student cheresources. The reverse water gas shift rwgs reaction has been known to chemistry since the mid 1800s. This work analyzes the watergasshift reactor design as component of the co cleanup system of the ethanol processor for h 2 production applied to pem fuel cells. Conduct the prototype membrane reactor demonstration for a fuel cell. The mechanism of the reverse watergas shift reaction over a cu catalyst was studied by co2 hydrogenation, temperatureprogrammed reduction of the cu catalyst and pulse reaction with qms monitoring.
The kcuzn catalyst has been synthesized by the coprecipitation method coupling with impregnation method and the catalytic performances for the reverse water gas shift rwgs reaction and mixed alcohols synthesis from co2 hydrogenation have been investigated. How to model water gas shift reactor in aspen plus. Design of water gas shift converter posted in student. Mechanism of co formation in reverse watergas shift reaction. Parameters used in the biogas reactor design were based on literature study and consultation to some. Mechanism of co formation in reverse watergas shift. Thus the conventional series of ht and lt shift reactors with heat recovery between the beds is placed by a single reactor with built in steam generation. Continue to synthesize and characterize improved membranes for the reactor. Catalysts for fuel cell application would need to operate at low temperatures.
In this configuration, the syngas stream, composed by co, co 2, and h 2 and fed to the methanol synthesis reactor, is produced by means of a reversewatergasshift by which a co 2 stream is partially converted in carbon monoxide. The water gas shift reaction has been run at high temperature in a packed bed reactor with a nickel catalyst. Hydrogen flux and selectivity through membrane durability of membrane in extreme environments labscale approach address scientific issues using mainly thick i. Copper based medium temperature water gas shift catalyst is ideal for use in fuel cell and other distributed hydrogen production applications. The wgs reactor constitutes the element of greater volume of the processor motivating its optimization. Jan 23, 2008 water gas shift reactor posted in student. Evaluation of alternate water gas shift configurations for igcc systems august 5, 2009 prepared by. An innovative process scheme to produce methanol from carbon dioxide is here presented and assessed via simulation. The reverse watergas shift reaction rwgs reaction was discovered in the 19th century as a method of producing water from carbon dioxide and hydrogen, with carbon monoxide as a side product. In the context of sustainable syngas production, the reverse watergas shift rwgs reaction is of high importance, as it converts co 2 to co with the help of process heat and hydrogen. The formate derived from association of h2 and co2 is proposed to.
Kinetic study of high temperature water gas shift reaction damien vannier. Reverse water gas shift reaction over supported cuni nanoparticle catalysts maxime lortie. New catalyst for the h 2 production by watergas shift reaction processes tesi di dottorato di ricerca in chimica industriale settore chim04 presentata da dr. Reverse watergas shift in a packed bed dbd reactor. Pilot water gas shiftmembrane device for hydrogen from coal. The reverse water gas shift process rwgs for water. Oct 31, 2012 the water gas shift wgs reaction is the upgrading stage in the cycles of hydrogen production by, for example, steam reforming onestage process for water gas shift in a pdbased membrane reactor aiche. Improving feal2o3 catalysts for the reverse watergas shift. Development of novel watergasshift membrane reactor. The wgs reaction was performed at high temperatures of 400550 c, and the effect of reaction pressure. In this study, a water gas shift membrane reactor containing both a co2selective polymeric membrane and a commercial cuznoal2o3 catalyst was developed for hydrogen processing for fuel cells, especially for the protonexchange membrane fuel cells pemfcs.
Our group is the first one to develop modified ferrite catalysts for ultra high temperature membrane reactor wgs applications. There are number of materials capable of catalyzing the water gas shift reaction, which are divided in two main classes that is the ironbased catalysts and the copperbased catalysts. Lowpower, lightweight, ultracompact reverse water gas shift. Reverse water gas shift reaction over supported cuni nanoparticle catalysts maxime lortie thesis submitted to the faculty of graduate and postdoctoral studies in. In the near future, an increasing amount of synthesis gas production will be based on coal gasification instead of natural gas. This project will develop hydrogenselective membranes for an innovative watergasshift reactor that improves gas separation. Tom meyer 1and robert zubrin 2, 1boulder center for science and policy, p. In the carbon based hydrogen production, water gas shift reaction is the intermediate step used for hydrogen enrichment and co reduction in the synthesis gas.
Analysis of design variables for watergasshift reactors by. Kinetics and simulation of the industrial reactor author links open overlay panel n. I want to model a water gas shift reactor which will be after a reformer using rgibbs reactor in aspen plus. Integration of methane steam reforming and water gas shift. Reactor design, modeling and optimization for the hightemperature methane pyrolysis and the reverse watergas shift reaction. Kinetic modeling of low temperature watergas shift. The reverse watergas shift reaction and the synthesis of. In the context of sustainable syngas production, the reverse water gas shift rwgs reaction is of high importance, as it converts co 2 to co with the help of process heat and hydrogen. In the sequence, a reactor known as water gas shift reactor wgsr converts the carbon monoxide present in syngas into carbon dioxide and more hydrogen is generated. The experiments were repeated 3 times to ensure stability and reproducibility.540 1292 902 1152 410 1314 1055 3 196 158 1256 1454 183 482 1268 1137 109 639 764 50 889 1029 502 248 311 394 830 735 160 305