Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al2O3 Catalyst: Syngas Production Enhanced over Ni‐CeOx Formation,ChemCatChem

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Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al2O3 Catalyst: Syngas Production Enhanced over Ni‐CeOx Formation
ChemCatChem ( IF 3.8 ) Pub Date : 2018-09-11 , DOI: 10.1002/cctc.201800829
Yan Liu _{1,

2} , Ye Wu _{1,

2} , Zarina Akhtamberdinova _{1,

2} , Xiaoping Chen ₃ , Guodong Jiang ₄ , Dong Liu _{1,

2}

Affiliation

The dry reforming of shale gas (methane and ethane with an average ratio of 4 : 1) with carbon dioxide (DRS) is considered to be a promising way to produce syngas, which widens the utilization of shale gas and mitigates carbon dioxide emission. In this paper, Ce modified Ni‐based catalysts were developed and the corresponding catalytic performances for DRS were investigated with a fixed bed reactor. Results showed that the catalyst containing 5 wt% of Ni and 5 wt% of Ce performed a best catalytic effect, including the selectivity of syngas and the carbon resistance performance, which is due to the good metal dispersion, strong interaction between Ni and Ce, and the formation of Ni‐CeO_x solid solution. The electron transfer between Ni and Ce, substitution of Ni for Ce, and the sequential oxygen vacancies or defects, play significant roles in activating CH₄, C₂H₆ and CO₂. The conversion of reactant gas increased with temperature, while the selectivity of syngas is little affected with temperature. In addition, the desired catalyst containing 5 wt% of Ni and 5 wt% of Ce showed good stability in the long‐time operation, which indicates that the Ce modified Ni‐based catalyst is a promising one for the dry reforming of shale gas.

中文翻译：

Ni-Ce-Al2O3催化剂对页岩气和二氧化碳进行干法重整：Ni-CeOx形成可提高合成气产量

页岩气（平均比例为4：1的甲烷和乙烷）与二氧化碳（DRS）的干法重整被认为是生产合成气的一种有前途的方法，该方法可以扩大页岩气的利用并减少二氧化碳的排放。本文开发了Ce改性的Ni基催化剂，并用固定床反应器研究了DRS的相应催化性能。结果表明，含有5 wt％的Ni和5 wt％的Ce的催化剂表现出最佳的催化效果，包括合成气的选择性和耐碳性，这归因于良好的金属分散性，Ni与Ce之间的强相互作用，和Ni-CeO _x的形成实在的方法。Ni和Ce之间的电子转移，Ni替代Ce以及相继的氧空位或缺陷在活化CH ₄，C ₂ H ₆和CO _2中起重要作用。反应气体的转化率随温度的升高而增加，而合成气的选择性几乎不受温度的影响。此外，所需的含有5 wt％的Ni和5 wt％的Ce的催化剂在长期运行中表现出良好的稳定性，这表明Ce改性的Ni基催化剂是页岩气干重整的有前途的催化剂。

更新日期：2018-09-11

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