Steam methane reforming, or smr, processes feedstocks, ranging from natural gas to light naphtha, mixed with steam to produce a hydrogen rich syngas effluent, with a typical h 2 co ratio of 3. Steam reforming is endothermicthat is, heat must be supplied to the process for the reaction to proceed. Pdf kinetic based simulation of methane steam reforming. Steam reforming or steam methane reforming is a method for producing syngas hydrogen and carbon monoxide by reaction of hydrocarbons with water. Steam methane reforming is the process which currently produces a synthesis. Structure sensitivity in steam and dry methane reforming. Natural gas is sent to the primary reformer for steam reforming, where superheated steam is fed into the reformer with the methane at 639. None of the commercial process simulators aspen plus, proii, hysys, etc.
The paper will examine the possibilities of co2 capture in a steam reforming based plant, and its impact on the economics of hydrogen production. The steam methane reforming process can be broken down into five distinct steps. C2pt catalyst process technology by gerard b hawkins managing director 2. Modeling and simulation of methane steam reforming in a. Simulation, sensitivity analysis and optimization of hydrogen. Smr based plants are most commonly used to produce a hydrogen product or a combination of a hydrogen stream and. Methane steam reforming, methanation and watergas shift. Using hysys, you can model and simulate the steam ethane reforming with propylene very.
Get your team aligned with all the tools you need on one secure, reliable video platform. Autothermal, optimization, reactor, modeling, aspen hysys. Adris chemical reaction engineering group creg, chemical engineering department king saud university, p. The product from my shift reactor are methane, water, hydrogen, carbon monoxide and carbon dioxide. Steps of designging a steam methane reformer for syngas production. May 14, 2010 steammethane reforming is a process in which high temperature steam 700c c is reacted with a methane source usually natural gas at a high pressure of 325 bar with a catylist. Redefining steam methane reformer performance in hydrogen. Advanced modelling and optimisation of natural gas reforming. However, to perform these calculations, a suitable reaction set and the relative kinetic.
Optimization of a methane autothermal reformingbased. Thermodynamic analysis of steam reforming of methane has been studied by method of gibbs free energy minimization for hydrogen or syngas production in the ranges of steam to methane from 0. Cost and performance comparison of stationary hydrogen. In steammethane reforming, methane reacts with steam under 325 bar pressure 1 bar 14. Chemical reactions catalyst shape design catalyst chemistry carbon formation and removal 3. Steam reforming of natural gas sometimes referred to as steam methane reforming smr is the most common method of producing commercial bulk hydrogen at about 95% of the world production of 500 billion m 3 in 1998. The resultants of the reaction include hydrogen, carbon monoxide and a relatively small amount of carbon dioxide. Studies of the methane steam reforming reaction at high. Membrane reactor, steam reforming, mathematical model. This paper presents the kineticbased simulation of methane steam reforming msr from natural gas and water gas shift wgs reaction for hydrogen. The c o 2 capture technologies including mea absorption and. Methane steam reforming reaction behaviour in a packed. Kinetics of methane steam reforming for hydrogen production has been studied through experiment in a microchannel reactor over coating catalyst. Commercial methane steam reforming catalyst nioal 2 o 3 particles were used as the feedstock in coating fabrication.
Develop a model that represents partial oxidation of methane to produce hydrogen. In the reforming reaction, natural gas is mixed with steam, heated to over 1,500 degrees fahrenheit, and reacted with nickel catalyst to produce hydrogen h. The first channel is a burner, where methane combustion takes place on the alumina supported platinum catalyst layer next to the reactor wall, as indicated by the bold line in fig. Steam reforming of methane and oxidative coupling of methane, chemical engineering and processing process intensification, 10. The second channel is a reformer where catalytic steam reforming of methane takes place.
For the baseline hfa, we compared the costs and efficiencies of two hydrogengeneration technologies steam methane reforming and autothermal reforming and two hydrogen purification. Methane steam reforming reaction behaviour in a packed bed membrane reactor lemnouer chibane and brahim djellouli international journal of chemical engineering and applications, vol. Kinetic based simulation of methane steam reforming and water gas shift for hydrogen production using aspen plus article pdf available in chemical engineering transactions 56. Steam methane reforming hydrogen production hysys tutorial.
Most hydrogen that is industrially produced today is done so via a heterogeneous catalytic process called steam methane reforming smr, eq 1 where water and methane react to form synthesis gas, a mixture of co an h 2. Before spraying, the catalyst particles were grinded into small granules and powders, and powders with a diameter less than 75. The reactions for the two simultaneous smr mechanisms are shown as equations 1 and 2. It represents the eiga contribution to the refineries bref1 being organized by the european ippc2 bureau. The reaction pathways of methane steam reforming on nickel catalyst are described 34 elementary steps as following, adsorption of reactant r1r2, activation of methane without oxygen r3r10, activation of methane with oxygen r11r18, dissociation of water r19r22 and the surface reaction to form products co 2. A large number of detailed reaction mechanisms were considered. Thermodynamic analysis of steam reforming of methane with. Process simulation to obtain a synthesis gas with high concentration of hydrogen 31 the addition of steam in the second reactor serves to the dual purpose of maintaining the reactor temperature and either to ensure that the excess of methane from the natural gas stream is consumed. Simulation of methane slippage in steam methane reforming mohd. Thunder and rain sounds for sleeping black screen sleep and relaxation dark screen nature sounds duration.
A methane reformer is a device based on steam reforming, autothermal reforming or partial oxidation and is a type of chemical synthesis which can produce pure hydrogen gas from methane using a catalyst. This model predicts the reforming process for a variety of feed stocks and reformer con. Intrinsic kinetics intrinsic rate equations were derived for the steam reforming of methane, accompanied by watergas shift on a ni mga1204 catalyst. For this purpose, methane was used the starting point and building block for the progressive understanding of reforming of complex hydrocarbons. The advantages of distributed hydrogen production are the production unit can be located at the consumer refueling site, the unit capacity can be tailored to the sites fueling requirements, and this approach eliminates the need for an extensive hydrogen delivery infrastructure.
Distributed hydrogen production via steam methane reforming. Water enters the furnace, producing steam at a very high temperature. Services the reformer process design is performed with a proprietary incremental kinetic model, and re. He later obtained his masters degree in chemical engineering, also from washington state university, in 2005. Simulation, sensitivity analysis and optimization of hydrogen production by steam reforming of methane using aspen plus. Hydrogen production via lowtemperature steammethane. If anyone is working with modelling of steam methane reforming with. Effect of catalytic cylinders on autothermal reforming of. The steam reforming of methane has been studied extensively 56. Assessment of co2 capture options from various points in. If anyone is working with modelling of steam methane reforming with propylene in packed bed reactor.
Kinetic and mechanistic aspects for co2 reforming of methane over ni based catalysts. Methanol steam reforming and selective co methanation. Simulation of hydrogen production for mobile fuel cell applications. Contents steam reforming reactions steam reforming catalyst equilibrium considerations carbon formation poisoning steam reformer modelling preand post reforming 3. Steam methane reforming hydrogen production aspen hysys tutorial duration. The steam reforming hydrogen plant for many years, steam methane reforming smr has been the leading technology for generation of hydrogen in refining and petrochemical complexes. Steam methane reforming is the most common and economical way to make hydrogen. Steam methane reforming chemical process simulation. The hybrid nanostructures, nionly and niceo2 nanoparticles decorated on al2o3 nanoparticle clusters nial2o3 npc and niceo2al2o3 npc, respectively, were successfully synthesized as catalysts for steam reforming of methane srm. Hence, if the hydrogen is produced from hydrocarbon or alcohol reforming, purification is. Kinetics, catalysis and mechanism of methane steam reforming.
In the overall steam methane reforming smr reaction, methane reacts with steam at high temperatures and moderate pressures in catalystfilled tubes to generate synthesis gas, a mixture of hydrogen, carbon monoxide and some carbon dioxide. May 19, 2011 steam methane reforming simulation hydrogen production hysys tutorial. Methane steam reforming has been simulated, analyzed and optimized with the aid of aspen plus, in this work. It is probably the most common and traditional method for producing hydrogen on an industrial scale. The design of the steam reforming process is in part dictated by these constraints. The equilibrium composition out of the steam reformer is shown in fig. A new multicylinder microchamber reactor is designed on autothermal reforming of methane for hydrogen production, and its performance and thermal behavior, that is, based on the reaction mechanism, is numerically investigated by varying the cylinder radius, cylinder spacing, and cylinder layout. This is largely due to its cost effectivness in obtaining a high level of purity in its produced hydrogen. The gproms advanced model library for fixedbed reactors aml. Steam methane reforming is the most widely used process for the generation of hydrogen. The main purpose of this technology is to hydrogen production.
The steam reforming conversion reaches almost 90%, exceeding slightly the targeted value. The autothermal reforming of methane developed using hysys 2004. Methanol steam reforming for hydrogen production chemical. I am trying to analyse the presence of propylene in steam methane reforming. The endothermic steam reforming reaction absorbs heat from the gas stream which. Using hysys, you can model and simulate the steam ethane reforming with.
Jul 29, 20 theory and practice of steam reforming 1. Overview of the book learn aspen plus in 24 hours 3. Hydrogen is used in the industrial synthesis of ammonia and other chemicals. Simulation of hydrogen production for mobile fuel cell. Jul 28, 20 steam reforming the basics of reforming 1. Steam methane reforming hydrogen production aspen hysys. Kinetic based simulation of methane steam reforming and. Steam methane reforming is the most widely used process for bulk gas production, accounting for 95% of the hydrogen produced in the united states.
Steam methane reforming posted in chemical process simulation. Hysys simulation for steam reforming posted in chemical process simulation. Methane steam reforming consists in the reaction of methane and steam on a supported nickel catalyst to produce a mixture of h 2, co, co 2 and ch 4. Hydrogen generation by steam reforming mahler ags gmbh. Hydrogen from natural gas via steam methane reforming smr. The studies used a novel silicabased membrane prepared by using the chemical vapor deposition cvd technique with a permeance for h 2 of 6. His masters thesis was titled fuel processing catalysis for microchannel applications. Hysys simulation for steam reforming chemical process. A schematic diagram of the plateplate reactor, with three channels is shown in fig. Simulation, sensitivity analysis and optimization of hydrogen production by steam reforming of methane using aspen plus article pdf available july 20 with 2,471 reads how we measure reads.
Simulation, sensitivity analysis and optimization of. Hydrogen is predominantly generated from the reaction amongst methane and steam. The reaction pathways of methane steam reforming on nickel catalyst are described 34 elementary steps as following, adsorption of reactant r1r2, activation of methane without oxygen r3r10, activation of methane with oxygen r11r18, dissociation of water r19r22 and the surface reaction to. Fbcr was used for detailed modelling of the catalyst beds considering rigorous intraparticle mass and heat transport. Methane steam reforming pdf document methane steam reforming.
In smr, methane reacts with steam under 325 bar pressure 1 bar 14. Mathematical modeling and optimization of combined steam and dry reforming of methane process in catalytic fluidized bed membrane reactor. Steam methane reforming simulation hydrogen production hysys tutorial. Currently, this process is the main route to obtain hydrogen and synthesis gas for ammonia and methanol. There are multiple types of reformers in development but the most common in industry are autothermal reforming atr and steam methane. Though this process can yield high a concentration of hydrogen up to 70%. Kinetic modeling for methane reforming with carbon dioxide. Many research and development programs are investigating the development of steam methane reforming technologies to enable the transition to sustainable energy, because it is. Comsol multiphysics software was applied to analyze the steam methane reforming in the chemical reactor investigated. Introduction an efficient and reliable way to produce hydrogen gas.
In general, methane reforming processes constantly generate a large amount of carbon dioxide from the steam met hane reformer smr, wgs reactor and prox reactor. Reforming unit this unit contains two sections, one is primary reforming, and another is secondary reforming. Pdf process simulation of natural gas steam reforming. In steam methane reforming, methane reacts with steam under 325 bar pressure 1 bar 14. The model of the steam reforming process used was developed using equilibrium reactor type. Hydrogen production via steam reforming with co2 capture. The paper reports the results of a heat transfer modeling of a membrane reactor for methane steam reforming, study developed in order to analyze the importance of temperature for methane conversion and hydrogen yield. Steam methane reforming smr is currently the main hydrogen production process in industry, but it has high emissions of co 2, at almost 7 kg co 2 kg h 2 on average, and is responsible for about 3% of global industrial sector co 2 emissions. Pdf kinetic based simulation of methane steam reforming and. Onsite hydrogen generation by steam methane reforming. Atr is essentially an oxidative steam reforming, which combines.
Experience with the haldortopsoe exchange reformer, aiche technical manual 47. Hydrogen generation by steam reforming mahler ags gmbh duration. The hfa is composed of a reforming system including the reformer, gas cleanup system, and peripheral components, a hydrogen compressor, storage tanks, and dispenser. A substantial amount of metalsupport interface was created in the hybrid nanostructure via aerosolbased evaporationinduced selfassembly, by which. Simulation of steam reformers for methane sciencedirect.
H298k 75 kjmol ch4 several parameters have been defined, including dimensions and information on the porous medium. In a postcrude oilbased society, hydrogen may become an important energy carrier, and a wide variety of fuels and chemicals can be produced from synthesis gas, for example, by. The desulfurized hydrocarbon feed is reformed to hydrogen and carbon oxides in the presence of steam in the primary reformer, and additionally with hot air in the secondary reformer. If anyone is working with modelling of steam methane. Introduction an efficient and reliable way to produce hydrogen gas is to reform the available natural gas fuel. Pdf simulation, sensitivity analysis and optimization of. Experiential learning and working with students in the labs 6. Steam reforming of natural gas wikid energy funhouse. Abbas ghareghashi, amir sarrafi and sattar ghader, the effect of heat transfer on products of a thermally coupled shell and tube reactor consisting of two processes. Methane steam reforming reaction behaviour in a packed bed.
333 58 1549 605 1487 1185 1234 621 384 608 1303 889 647 1605 1166 524 448 116 1381 388 1366 1103 445 718 30 440 1191 1087 159 577 117 1256 54 583 553 1461 32 1232 1204 447 1472 748 763 586 327