Low-Temperature Catalytic Dry Reforming of Methane over Pd Promoted Ni–CaO–Ca12Al14O33 Multifunctional Catalyst
Low-Temperature Catalytic Dry Reforming of Methane over Pd Promoted Ni–CaO–Ca12Al14O33 Multifunctional Catalyst
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DOI：
10.1021/acs.iecr.1c04010
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发表时间：
2021-12
影响因子：
4.2
通讯作者：
Chengxiong Dang;Jingdong Luo;Wenwen Yang;Hanke Li;Weiquan Cai
中科院分区：
文献类型：
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作者：
Chengxiong Dang;Jingdong Luo;Wenwen Yang;Hanke Li;Weiquan Cai
The dry reforming of methane (DRM) suffers from high energy consumption and catalyst deactivation over time on stream at high operating temperatures (>800 °C). Here, we demonstrate that DRM is effectively catalyzed at 600 °C by Pd promoted Ni–CaO–Ca12Al14O33multifunctional adsorbent/catalyst materials with 67% CO2conversion, 68% CH4conversion, and a H2/CO ratio close to unity. Notably, the catalyst shows no sign of deactivation at 600 °C for a 50 h continuous on-stream DRM reaction. The high performance is ascribed to the enhanced CH4dissociation activity with the presence of Pd. CH4reformed with CaCO3achieved the transformation between bulk CaCO3and nanoparticles of CaO. The dynamic transformation may allow for reversible encapsulation and release of Ni particles, thereby suppressing Ni sintering. Furthermore, the coke formed on the catalyst is mainly the active carbon species which is easily removed by CO2and CaCO3, thus ensuring the long-term stability. The results demonstrated herein shed light on a new paradigm to design low-temperature DRM reaction catalysts.
