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. Reverse flow reactor operationfor control of catalyst. Then it was promoted with ni ions to produce nimoal2o3 catalyst. Copper based medium temperature water gas shift catalyst. Reactors jordan university of science and technology. The rwgs reaction was first observed by carl bosch and wilhelm wild in. Copper based medium temperature water gas shift catalyst is ideal for use in fuel cell and other distributed hydrogen production applications. We explained this negative effect of cu by using several techniques. Reverse flow reactor operationfor control of catalyst surface coverage citation for published version apa. Reactor design, modeling and optimization for the high. Kinetic study of high temperature water gas shift reaction. Our group is the first one to develop modified ferrite catalysts for ultra high temperature membrane reactor wgs applications. 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.
Parameters used in the biogas reactor design were based on literature study and consultation to some. 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. I want to model a water gas shift reactor which will be after a reformer using rgibbs reactor in aspen plus. 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. The catalytic activity and product distribution depend strongly on reaction temperature, pressure, space velocity and the molar. The kinetics of simultaneous methanol synthesis and reverse watergas shift from co2h2and co2coh2mixtures have been measured at low conversions over a. Reverse watergas shift in a packed bed dbd reactor. Conduct the prototype membrane reactor demonstration for a fuel cell. Pdf study of the reverse watergas shift and dryreforming. Process intensification with integrated watergasshift. In comparison with the reaction of co2 alone, hydrogen can significantly promote the co formation in the rwgs reaction. Tom meyer 1and robert zubrin 2, 1boulder center for science and policy, p. The reverse watergas shift reaction and the synthesis of. The presence of high concentration of carbon dioxide can lead to reverse water gas shift.
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. Introduction the worlds progression towards the hydrogen economy is facilitating the production of hydrogen from various resources. 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. Hydrogen production from the lowtemperature watergas shift reaction. Introduction a watergasshift wgs reactor for the conversion of carbon monoxide co and water to. 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. Douglas falleiros barbosa lima, fernando ademar zanella, marcelo kaminski lenzi and papa matar ndiaye march 28th 2012. Kinetics and simulation of the industrial reactor author links open overlay panel n. Most hydrogen plants convert co to co2 by hightemperature water gas shift hts followed by lowtemperature water gas shift lts.
In the near future, an increasing amount of synthesis gas production will be based on coal gasification instead of natural gas. The funders had no role in the design of the study. Depending on the reaction conditions, the equilibrium for the water gas shift. Two commonly used reactors are the cstr continuous stirred tank reactor and the pfr plug flow reactor. 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.
Jul 29, 20 water gas shift, hydrogen purification, low temperature shift, high temperature shift flowsheets slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Rwgs uses carbon dioxide and hydrogen as reactants to produce oxygen and carbon monoxide with a copper on alumina catalyst. Pdf modeling and simulation of water gas shift reactor. Role of watergasshift reaction in fischertropsch synthesis. The linde isothermal shift reactor isr the linde isothermal shift reactor isr is used for the coshift reaction and allows conversion to below 0. Reactors are usually designed based on rate considerations. Reverse water gas shift reaction over supported cuni. Mechanism of co formation in reverse watergas shift. Evaluation of alternate water gas shift configurations for igcc systems august 5, 2009 prepared by. Evaluation of alternate water gas shift configurations for. It is important to ensure that the equipment specified will be capable of achieving the desired yields and selectivity. 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. 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. The reverse water gas shift process rwgs for water.
In the present study, moal2o3 catalyst was prepared using impregnation method. Watergas shift reaction industrial process britannica. Catalytic reverse water gas shift reaction was conducted in an electric field denoted as erwgs over various catalysts at low temperature as 423 k. The wgs reactor currently represents the largest volume of any catalyst in a fuel processor due to the slow. Watergasshift wgs reaction plays a significant role in industrial application of fischertropsch synthesis fts for coaltoliquid ctl processes with ironbased catalysts. Hi,i need to design a water gas shift reactor as part of my design project. 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. Reactor design is a vital step in the overall design of a process. 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. Each set of catalysts was tested using the reverse water gas shift, rwgs, reaction under atmospheric pressure and at temperatures ranging from 400c700c. The formate derived from association of h2 and co2 is proposed to be the. How to model water gas shift reactor in aspen plus. 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.
Mechanism of co formation in reverse watergas shift reaction. Zeolite membrane reactor for water gas shift reaction for hydrogen production jerry y. Reverse water gas shift chemical looping for syngas production from co 2 dissertation. A water gas shift wgs membrane reactor mr has been constructed using a mfitype zeolite disk membrane packed with a ceriumdoped ferrite catalyst. 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. Co2 conversion by reverse water gas shift catalysis nsfpar. However, bubbling a gas through a liquid may serve just. The reverse water gas shift process rwgs for water and oxygen. A fixed bed and a fluidized bed reactor design for the reverse watergas shift chemical looping rwgscl process with 80wt% fe2o3. Forward and reverse watergas shift kinetics catalytic effect of reactor materials, membrane materials need for heterogeneous catalysis. Hi, im studying on the water gas shift reaction and i need to following article.
The reverse water gas shift rwgs reaction has been known to chemistry since the mid 1800s. 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. Analysis of design variables for watergasshift reactors. Reverse flow reactor operationfor control of catalyst surface coverage. In a batch reactor, the reagents are added together and allowed to react for a given amount of time. Kinetics and catalysis of the watergasshift reaction. In a gassolid catalytic reactor, the reaction takes place on the surface of the solid and is thus heterogeneous. Packed bed membrane reactor for the water gas shift reaction.
Water gas shift welcome to sudchemie india pvt ltd. In particular, various reaction conditions as well as key process variables such as feed temperature. The experiments were repeated 3 times to ensure stability and reproducibility. The water gas shift reaction has been run at high temperature in a packed bed reactor with a nickel catalyst. Development of nimoal2o3 catalyst for reverse water gas. Palladiumbased catalytic membrane reactors cmrs effectively remove h 2 to induce higher conversions in methane steam reforming msr and watergasshift reactions wgs. These reactors provide enough residence time for the reaction to take place with satisfactory conversion. Biological watergas shift conversion of carbon monoxide to hydrogen milestone completion report wade a. Design of water gas shift converter posted in student. 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. High temperature water gas shift hts for the high temperature water gas shift reaction, typically performed at 320450. Eric grol, netl wenching yang, research and development solutions, llc saic. Hydrogen production from the lowtemperature watergas. Analysis of design variables for watergasshift reactors by.
Race for a co2tofuel technology advanced science news. Within such a context, this work evaluates the technical performance of a novel cmr, which utilizes two catalysts in series, rather than one. Development of novel water gas shift membrane reactor addressing barrier l. Reverse water gas shift reaction over supported cuni nanoparticle catalysts maxime lortie. Integration of methane steam reforming and water gas shift. Development of novel water gasshift membrane reactor. Design of water gas shift reactors posted in student. 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. Low temperature catalytic reverse water gas shift reaction. 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. Modeling and simulation of water gas shift reactor. The water gas shift technology reduces co concentration in the reformate stream to 0. Lin, henk verweij, peter smirniotis and junhang dong. Packed bed membrane reactor for the water gas shift.
In particular, emissions resulting from the use of hydrogen as fuel contain only water, one of the reasons why that. Kinetic study of high temperature water gas shift reaction damien vannier. Reverse water gas shift reaction is endothermic and. Reactor design, modeling and optimization for the hightemperature methane pyrolysis and the reverse watergas shift reaction. In a batch reactor, the reagents are added together and. 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. Design of water gas shift converter student cheresources. Hydrogenselective membranes for highpressure hydrogen separation. One possible way to shift towards a more sustainable future is to use co 2 as the main carbon source instead of fossil fuels. This project will develop hydrogenselective membranes for an innovative watergasshift reactor that improves gas separation. This presentation does not contain any proprietary, confidential, or otherwise restricted information. Reverse water gas shift reaction over supported cuni nanoparticle catalysts maxime lortie thesis submitted to the faculty of graduate and postdoctoral studies in.
Complete the proofofconcept demonstration using the lab membrane reactor. Kinetic modeling of low temperature watergas shift. Development of novel watergasshift membrane reactor. Its purpose is to produce hydrogen and to reduce the level of co for final cleanup by preferential oxidation. Improving feal2o3 catalysts for the reverse watergas shift. Pilot water gas shiftmembrane device for hydrogen from coal. Hydrogen flux and selectivity through membrane durability of membrane in extreme environments labscale approach address scientific issues using mainly thick i. Jan 23, 2008 water gas shift reactor posted in student. C, a cufeoxidecroxide based catalyst sk2012 is used.
An industrial case, petrochemicals, vivek patel, intechopen, doi. 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. The formate derived from association of h2 and co2 is proposed to. Continue to synthesize and characterize improved membranes for the reactor. Index termsgasification, thermodynamic modeling, supercritical water, watergas shift reaction i.
In the case of a lightassisted process that converts co2 and h2o to fuel, the water question is frequently asked. Modeling and simulation of water gas sh ift reactor. Methanol production from co2 via reversewatergasshift. The carbon dioxide is removed by dissolving it in water at a pressure of about ten atmospheres. Department of energy laboratory operated by midwest research institute battelle contract no. 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. 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. 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.
Co2 conversion by reverse water gas shift catalysis. Our group is the first one to explain the negative effect of cu observed in the water gas shift reaction. Zeolite membrane reactor for watergasshift reaction for. 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. An innovative process scheme to produce methanol from carbon dioxide is here presented and assessed via simulation. Packed bed membrane reactor for the watergas shift reaction. 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. Modeling and simulation of watergas shift reactors. Biological watergas shift conversion of carbon monoxide. Water gas shift, hydrogen purification, low temperature shift, high temperature shift flowsheets. The wgs reactor constitutes the element of greater volume of the processor motivating its optimization. Catalysts for fuel cell application would need to operate at low temperatures. Reverse watergas shift chemical looping for syngas. Pilot water gas shift membrane device for hydrogen from coal tom barton western research institute 511.
The reverse water gas shift rwgs process is a candidate technology for water and oxygen production on mars. Madeira, for giving me the greatest opportunity to participate in this field of research, for his. Co2selective water gas shift membrane reactor for fuel cell. Amos national renewable energy laboratory 1617 cole boulevard golden, colorado 8040393 nrel is a u. Design and development of biogas reactor for farmer group scale teguh wikan widodo, ahmad asari, ana n. Lowpower, lightweight, ultracompact reverse water gas shift. The design of reactor may be influenced by factors, including process requirements, advantages and disadvantages. 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. 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. 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. Development of nimoal2o3 catalyst for reverse water gas shift rwgs 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 the carbon based hydrogen production, water gas shift reaction wgsr is the intermediate step used for.
1066 527 1476 218 1289 1511 268 1076 856 348 1543 259 807 285 1483 42 1211 503 1357 1068 558 440 1239 872 115 1067 1376 448 1317 1334 611 1130 71