Dry reforming of methane over Co–Mo/Al2O3 catalyst under low microwave power irradiation†,Catalysis Science & Technology

当前位置： X-MOL 学术 › Catal. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Dry reforming of methane over Co–Mo/Al2O3 catalyst under low microwave power irradiation†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-09-11 00:00:00 , DOI: 10.1039/c8cy01601a
Hoang M. Nguyen _{1,

2,

3,

4} , Gia Hung Pham _{1,

2,

3,

4} , Ran Ran _{1,

2,

3,

4} , Robert Vagnoni _{3,

4,

5} , Vishnu Pareek _{1,

2,

3,

4} , Shaomin Liu _{1,

2,

3,

4}

Affiliation

In this work, microwave (MW) irradiation was used to activate Co/Al₂O₃, Mo/Al₂O₃, and Co–Mo/Al₂O₃ catalysts for dry reforming of methane (DRM) reactions. Experimental results indicate that single metallic catalysts of either Co or Mo are inactive for DRM under all the tested conditions due to their limited MW-absorbing ability. In contrast, Co–Mo bimetallic catalysts supported by Al₂O₃ exhibit high catalytic activity due to the formation of a magnetodielectric Co_0.82Mo_0.18 alloy, which plays the dual role of a good MW acceptor and the provider of active centers for the DRM reaction. The MW power level required to activate such bimetallic catalysts for DRM is significantly dependent on the molar ratio between Co and Mo. The CoMo2 catalyst (with a molar ratio of 2.0 Co to 1.0 Mo) supported on Al₂O₃ exhibits the best catalytic performance, converting 80% CH₄ and 93% CO₂ to syngas at a ratio of H₂/CO of 0.80 at the total volumetric hourly space velocity (VHSV) of 10 L g⁻¹ h⁻¹ and MW power of 200 W. As compared to the reported C-based catalysts, the Co–Mo/Al₂O₃ catalyst delivers more favorable stability over 16 time-on-stream (TOS) by virtue of its intrinsic ability to absorb MW without the inclusion of auxiliary MW acceptors.

中文翻译：

在低微波功率照射下，用Co-Mo / Al ₂ O ₃催化剂对甲烷进行干法重整†

在这项工作中，微波（MW）辐照用于活化Co / Al ₂ O ₃，Mo / Al ₂ O ₃和Co-Mo / Al ₂ O ₃催化剂，以进行甲烷（DRM）反应的干重整。实验结果表明，由于钴或钼的单金属催化剂对MW的吸收能力有限，因此它们在所有测试条件下对DRM均无活性。相反，由Al ₂ O ₃负载的Co-Mo双金属催化剂由于形成了磁电Co _0.82 Mo _0.18而表现出高催化活性。合金，起着良好的MW受体和DRM反应活性中心提供者的双重作用。激活此类双金属催化剂以进行DRM所需的MW功率水平很大程度上取决于Co和Mo之间的摩尔比。负载在Al ₂ O ₃上的CoMo2催化剂（摩尔比为2.0 Co对1.0 Mo）表现出最佳的催化性能。，在10 L g ^-1 h ^-1的总体积时空速（VHSV）和200 W的MW功率下，以H ₂ / CO为0.80的比率将80％CH ₄和93％CO ₂转化为合成气。与报道的碳基催化剂相比，Co-Mo / Al ₂ O ₃ 凭借其固有的吸收MW的能力（不包含辅助MW受体），该催化剂在16个运行时间（TOS）上提供了更有利的稳定性。

更新日期：2018-09-11

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11