Optimization of a methane autothermal reformingbased. Autothermal reformer an overview sciencedirect topics. The following are the advantages of using the autothermal reforming process. Effect of catalytic cylinders on autothermal reforming of. The purpose is to increase the ratio between steam reforming and partial oxi. Acknowledgement this work was supported by the national natural science foundation of china no. A novel reactor type for autothermal reforming of diesel fuel.
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 dissertation presents initial developments on ngr modelling in gproms. Improve syngas production using autothermal reforming. A novel reactor type for autothermal reforming of diesel fuel and kerosene. Autothermal reforming atr is a process for producing syngas, composed of hydrogen and carbon monoxide, by partially oxidizing a hydrocarbon feed with oxygen and steam and subsequent catalytic reforming. Reforming technologies to improve the performance of combustion.
Autothermal reforming the use of autothermal reformers in syngas manufacture for ammonia and methanol production began in the middle of the last century 3, 4. The various reactor designs, fuel delivery systems and catalysts and. Autothermal operation of the reactor was successfully demonstrated. Jc 2001 design of adiabatic fixedbed reactors for the partial oxidation. The concepts use heat available in the process gas downstream an atr for steam reforming in a heat exchanger type of reactor. Autothermal reforming of methane with integrated co2 capture. Autothermal reforming atr, one of the alternatives to. In reactors some such as the packed bed or fluidized catalytic cracking unit fccu, the momentum balance is considered with both the mass and energy balances. The two main reformers, the steam methane reformer smr and the autothermal reformer atr were modelled. Cameron, in studies in surface science and catalysis, 2001. Ab two fluidized bed membrane reactor concepts for hydrogen production via autothermal reforming of methane with integrated co2 capture are proposed. Autothermal fixedbed reactor concepts sciencedirect.
The combined output from these two trains feeds a single train isocracker. Basic objectives in design of a reactor in chemical engineering physical operations such as fluid flow, heat transfer, mass transfer and separation processes play a very large part. The autothermal reforming reactor consists of three zones. However, further research is required to optimize the performance of autothermal reformers and accurate models of reactor performance must be developed and validated. Syngas conversion uses hydrocarbon feedstocks, steam, osub 2 and cosub 2, either separately or in combinations. Autothermal reforming atr is a lowinvestment process using a simple reactor design. This may be done in a tubular catalytic steam reformer with a furnace to provide external heat, in an autothermal reformer where partial oxidation is combined with adiabatic catalytic steam reforming, or in a partial oxidation reformer followed by a shift reactor.
Preliminary modeling and design of an autothermal reformer. Describes the operation and the equations used to model an autothermal reactor. Tubular reforming and autothermal reforming of natural gas. Mar 06, 20 describes the operation and the equations used to model an autothermal reactor. This feature makes atr useful for many applications, and it has been proven industrially to provide quality syngas for largescale plants. Autothermal reactor interactive simulation youtube. On the other hand, the process of combined reforming utilizes both of primary and secondary tools for production of synthesis gas, as it is commonly practiced in ammonia manufacturing. Autothermal reforming an overview sciencedirect topics.
The feed gas enters an annular region around the packed bed, but flows in the opposite direction from that in the packed bed. The main, and most widespread, reactor designs for ngr are steam methane reforming smr and autothermal reforming atr. Developed in the late 50s, atrs main application was for ammonia and methanol syntheses. Autothermal reforming of methane on rhodium catalysts. If we consider the countercurrent heat exchanger of fig. Based on specific conditions of maximum waste heat recovery, the optimization algorithm for maximizing hydrogen yield is obtained. Autothermal reforming atr syngas generation air liquide. Pdf the autothermal low temperature catalytic partial oxidation of methane was investigated in a bench scale reactor 1 kw th power over a. Today, atr technology replaces twostep reforming technology in topsoes optimized solution for largescale methanol plants 1. Together with the hightemperature polymer electrolyte fuel cell, the reactor for the autothermal reforming atr of liquid hydrocarbons, such as. The reactor performance of two novel fluidized bed membrane reactor. Autothermal reforming of natural gas to synthesis gas. A reactor design which can maximize the enthalpy in the reforming channels will be highly beneficial to the reforming process and the overall thermal efficiency. Advanced modelling and optimisation of natural gas.
Steam srm and autothermal atr reforming of methane processes were evaluated through thermodynamical and stoichiometric analyses that benefit hydrogen production, using a nigal 2 o 3 catalyst. Conventional autothermal reforming process comprises three main reactions. Describes how to use an interactive simulation that solves the differential equations for an autothermal reactor, which is a catalytic reactor in which the feed gas is preheated in an annular. John bogild hansen haldor topsoe methanol workshop, lund university march 17, 2015. A novel reactor concept with autothermal operation is presented for the simultaneous production of ethylene by oxidative coupling ocm and synthesis gas by steam reforming of methane srm. With regard to methane reformingbased hydrogen production processes, a combination of partial oxid ation and steam reforming of methane in an autothermal reform ing atr reactor has recently become more popular. Pdf modeling an simulation of an autothermal reformer. Catalytic partial oxidation cpox requires the use of a catalyst, and the fuel. Autothermal reforming of natural gas to synthesis gas reference. Steam srm and autothermal atr reforming of methane processes were evaluated through thermodynamical and stoichiometric analyses that benefit hydrogen production, using. The gtl plant design has two parallel trains each consisting of a world scale air separation plant. Design and control of standalone autothermal reforming. Advanced modelling and optimisation of natural gas reforming. Therefore, flow conditions, the heat release, and the risk of soot formation are different in the autothermal and secondary reformers resulting in different requirements to burner and reactor design.
The scientific work in the fuel processing and systems group at forschungszentrum juelich has the strategic aim of developing a hightemperature polymer electrolyte fuel cell ht pefc system based on the autothermal reforming of middle distillates such as diesel and. Autothermal reforming atr is an important industrial process used to produce syngas with a low h2co ratio from 1. While these two will be described hereinafter, other important reforming technologies include catalytic and noncatalytic partial oxidation and, more recently developed, heat. Diesel reforming poses several unique technical challenges, however. Proven autothermal reforming technology for modern large. Microkinetic analysis for model reduction marm dixita, renika baruaha, dhrupad parikha, sudhanshu sharmaa, atul bhargava,1 aenergy systems laboratory, iit gandhinagar, ahmedabad, gujarat, india abstract methane autothermal reforming has been studied using comprehensive, detailed microkinetic. The gtl plant design has two parallel trains each consisting of a world scale air separation plant, an autothermal reformer, and a slurry phase fischertropsch reactor. These challenges result from the physical and chemical properties of diesel fuel. To better understand diesel reforming and the chemistry involved, we have investigated the autothermal reforming of several major diesel constituents in a kilowattscale reactor. There are multiple types of reformers in development but the most common in industry are autothermal reforming atr and steam methane. Nov 07, 20 abstract the conceptual design of compact, standalone autothermal reforming systems using methanol is presented. The standard reactor design for an autothermal fixedbed reactor consists of an adiabatic fixed bed of catalyst which is connected with a heat exchanger so that the hot reactor effluent heats up the cold feed. 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. When reforming is followed by ft, it is possible to recycle ft tail gas to the.
A typical autothermal reforming process scheme, as illustrated in fig. Autothermal reforming at low steamtocarbon ratio the majority of the worlds syngasproducing plants apply steam methane reforming, with the specific type of reforming technology depending on application and operating conditions. Dec 23, 2015 autothermal reforming or oxidative steam reforming is a combination of conventional steam reforming of the fuel endothermic reaction with the partial oxidation of a small amount of the fuel exothermic reaction in order to achieve an autothermal reaction that proceeds without external input of energy chang et al. Steam methane reforming smr and autothermal reformer atr are two industrial examples of the primary and secondary reformers, respectively. This chapter also discusses autothermal reactors, the conversion of ammonia, and finally, the optimumtemperature progression, with derived equations for reversible exothermic reactions. Reforming of diesel fuel for transportation applications. In the atr operation condition where steam is supplied to the reactor in excess, parmar et al.
Thermal management of methanol reforming reactors for the. Advances in autothermal reformer design request pdf. Partial oxidation reactions occur in a region of the reactor referred to as the. Standalone autothermal reforming atr is advantageous because it does not require the supply or dissipation of thermal energy to or from the reaction. Mann prepared by sandia national laboratories albuquerque, new mexico 87185 and livermore, california 94550 sandia is a multiprogram laboratory operated by sandia corporation. Mar 24, 2008 hydrogen production via autothermal reforming atr is particularly attractive for applications that demand a quick startup and response time in a compact size. In this autothermal reactor, an exothermic reaction takes place in a packed bed of catalyst a plug flow tubular reactor. Effect of catalytic cylinders on autothermal reforming of methane. Natural gas reforming an overview sciencedirect topics. A more detailed comparison of the performance of the two proposed reactor concepts is carried out with a simulation study and is presented in the second part of this work. The integration of reaction and heat exchange within one piece of equipment has advantages over the conventional. The process is sootfree due to burner design and fixedbed catalyst. Topsoe offers several types of reforming technologies and has.
A modelling and experimental approach article in international journal of hydrogen energy january 2015 with 173 reads how we measure reads. Because co is denatured to h2 of equivalent mol volume in the poststage shift reactor of an autothermal reformer. Autothermal reactor learncheme educational resources for. In any manufacturing process where there is a chemical change. Design and performance of a kw scale reformer using pure oxygen as oxidant.