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Catalyst deactivation and engineering control for steam reforming of higher hydrocarbons in a novel membrane reformer

机译：新型膜重整器中高级烃蒸汽重整的催化剂失活和工程控制

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The catalyst deactivation and reformer performance in a novel circulating fluidized bed membrane reformer (CFBMR) for steam reforming of higher hydrocarbons are investigated using mathematical models. A catalyst deactivation model is developed based on a random carbon deposition mechanism over nickel reforming catalyst. The results show that the reformer has a strong tendency for carbon formation and catalyst deactivation at low steam to carbon feed ratios ( < 1.4 mol/mol) for high reaction temperatures ( > 700 K) and high pressures ( > 506.5 kPa). The trend is similar for the cases without and with hydrogen selective membranes. Based on this preliminary investigation, an engineering control approach, i.e., in-site control with a concept of critical/minimum steam to carbon feed ratio, is proposed and used to determine the carbon deposition free regions for both cases without and with hydrogen membranes. The comparison between the reported data and model simulation shows that the critical steam to carbon feed ratio predicted by the model agrees well with the reported industrial/experimental operating data. (C) 2004 Elsevier Ltd. All rights reserved.
机译：使用数学模型研究了新型的循环流化床膜重整器（CFBMR）中用于高级烃蒸汽重整的催化剂失活和重整器性能。基于镍重整催化剂上的随机碳沉积机理，建立了催化剂失活模型。结果表明，在高反应温度（> 700 K）和高压（> 506.5 kPa）下，重整器在低蒸汽/碳进料比（<1.4 mol / mol）下具有很强的碳形成和催化剂失活的趋势。对于没有和有氢选择性膜的情况，趋势是相似的。在此初步研究的基础上，提出了一种工程控制方法，即采用临界/最小蒸汽与碳进料比的概念进行现场控制，并将其用于确定无膜和有氢膜情况下的无碳沉积区域。所报告的数据与模型模拟之间的比较表明，模型预测的临界蒸汽/碳进料比与所报告的工业/实验操作数据非常吻合。 （C）2004 Elsevier Ltd.保留所有权利。

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