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Rh/θ-Al_2O_3/FeCrAlloy wire mesh composite catalyst for partial oxidation of natural gas

机译:Rh /θ-Al_2O_3/ FeCrAl合金丝网复合催化剂用于天然气的部分氧化

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摘要

The catalytic modules based on Rh/theta-Al2O3/FeCrAlloy wire mesh composite were designed and manufactured. Due to enhanced heat transfer properties, the module exhibits an excellent performance for natural gas partial oxidation, providing thermodynamic equilibrium product distribution and synthesis gas productivity of 56.7 m(3)L(ca)(t)(1)h(-1) (s.c.) at 800 degrees C and gas hourly space velocity (GHSV) of 80000 h(-1). The catalyst demonstrated stable operation with start/stop cycles for at least 20 h on stream. Analysis by the Brunauer-Emmett-Teller (BET) technique, X-ray diffraction and electron microscopy revealed no damages of the catalytic coating and confirmed structural stability of the catalyst under operating conditions. Despite the elevated operational temperatures achieving 940 degrees C and rapid temperature changes, the composite catalyst retained a high Rh dispersion and good adhesion of the theta-Al2O3 layer. (C) 2018 Elsevier B.V. All rights reserved.
机译:设计并制造了基于Rh / theta-Al2O3 / FeCrAlloy丝网复合材料的催化组件。由于增强的传热性能,该模块在天然气部分氧化方面表现出出色的性能,可提供56.7 m(3)L(ca)(t)(1)h(-1)的热力学平衡产物分布和合成气生产率( sc)在800摄氏度和80000 h(-1)的气体时空速度(GHSV)。催化剂显示出至少20小时的启动/停止循环稳定运行。通过Brunauer-Emmett-Teller(BET)技术,X射线衍射和电子显微镜进行的分析表明,在操作条件下,催化涂层没有损坏,并确认了催化剂的结构稳定性。尽管升高的工作温度达到了940摄氏度和快速的温度变化,但复合催化剂仍保持了高Rh分散性和theta-Al2O3层良好的附着力。 (C)2018 Elsevier B.V.保留所有权利。

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