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Development of a novel reactor concept for the partial oxidation of methane to syngas

机译:甲烷部分氧化为合成气的新型反应器概念的开发

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The gas-to-liquid process,consisting of the partial oxidation of methane (POM)followed by the Fischer-Tropsch reaction,is a promising alternative to conventional oil processing for the production of liquid fuels.The cost of a conventional POM process is mainly determined by cryogenic air separation and could be greatly reduced by using oxygen permselective perovskite membranes instead.These membranes operate at temperatures similar to POM processes and can thus be integrated into a catalytic membrane reactor.To investigate the implications of this integration an adiabatic thermodynamic analysis has been carried out for both oxygen-and air-based POM processes,focusing on the influence of the feed temperature and composition on the syngas yield and quality.This analysis revealed that much higher feed temperatures are required for air-based POM processes to reach similarly high syngas yields.Because the Fischer-Tropsch reaction is carried out at much lower temperatures,recuperative heat exchange becomes essential for air-based POM processes.This is preferably carried out inside the reactor using the reverse flow concept,since external heat transfer at elevated temperatures is expensive.To combine the POM reaction,air separation and recuperative heat exchange into a single apparatus a reverse-flow catalytic membrane reactor (RFCMR)is proposed.
机译:气液工艺由费托反应之后的甲烷部分氧化(POM)组成,是生产液体燃料的常规石油加工的有希望的替代方法。常规POM工艺的成本主要是通过低温空气分离法测定,并可以通过使用氧渗透性钙钛矿膜来大大减少这些膜在类似于POM工艺的温度下运行,因此可以整合到催化膜反应器中。要研究这种整合的意义,绝热热力学分析具有针对氧气和空气基POM工艺进行了研究,重点研究了进料温度和组成对合成气收率和质量的影响。此分析表明,空气基POM工艺需要更高的进料温度才能达到合成气收率高。因为费-托反应在较低的温度下进行,所以蓄热对于基于空气的POM工艺而言,xchange必不可少。这最好在反应器内部使用逆流概念进行,因为在高温下外部传热的成本很高。要将POM反应,空气分离和换热换热合并为一个装置提出了一种逆流催化膜反应器(RFCMR)。

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