Abstract The catalytic performance of fibre-like Ta-promoted Ni/ZSM-5 in Dry reforming of methane (DRM) was studied under different feeding compositions for obtaining a robust catalyst, which is important for large-scale production of syngas via DRM. The deactivation of unpromoted Ni/ZSM-5 was due to polymerization of carbon deposits which block the active sites and accelerate agglomeration. Introduction of Ta was shown to facilitate the rate of dissociation of reactants and carbon gasification due to increased Ni-support interaction and surface oxygen species. From ANOVA analysis, operating temperature was found to be the most significant operating parameter that influence CH4 conversion. The optimum CH4 conversion predicted from the response surface analysis is 96.6 % at reaction temperature of 784.15 °C, CO2:CH4 feed ratio of 2.52, and GHSV of 33,760 mL g-1 h-1. The strong catalytic stability is a result of the small-size and immobilized Ni sites which is vital for efficient DRM catalyst development.

中文翻译：

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在 Ta 促进的 Ni/ZSM-5 纤维状催化剂上甲烷的 CO2 重整：使用响应面方法 (RSM) 对失活行为和优化的见解

摘要 研究了纤维状 Ta 促进的 Ni/ZSM-5 在不同进料组成下对甲烷干重整 (DRM) 的催化性能，以获得稳健的催化剂，这对于通过 DRM 大规模生产合成气具有重要意义。未促进的 Ni/ZSM-5 的失活是由于碳沉积物的聚合而阻塞了活性位点并加速了团聚。由于 Ni-载体相互作用和表面氧物质的增加，Ta 的引入显示出促进反应物的解离速率和碳气化。从方差分析中，发现操作温度是影响 CH4 转化率的最重要的操作参数。根据响应面分析预测的最佳 CH4 转化率为 96.6%，反应温度为 784.15 °C，CO2:CH4 进料比为 2.52，和 GHSV 为 33,760 mL g-1 h-1。强大的催化稳定性是小尺寸和固定化 Ni 位点的结果，这对于有效的 DRM 催化剂开发至关重要。