Plasma-assisted dry reforming of methane over Mo2C-Ni/Al2O3 catalysts: Effects of β-Mo2C promoter
Plasma-assisted dry reforming of methane over Mo2C-Ni/Al2O3 catalysts: Effects of β-Mo2C promoter
复制标题
Mo2C-Ni/Al2O3 催化剂上等离子体辅助甲烷干重整：β-Mo2C 促进剂的作用
DOI：
10.1016/j.apcatb.2021.120779
复制
发表时间：
2021-10-09
影响因子：
22.1
通讯作者：
Shi, Chuan
中科院分区：
文献类型：
--
作者：
Diao, Yanan;Zhang, Xiao;Shi, Chuan
非热等离子体（NTP）与催化剂结合提供了一种使甲烷干重整（DRM）反应能够在低温下发生的方式。而NTP的辅助作用由于NTP诱导的CH 4解离速率更快而带来了焦炭沉积的负面问题。在此，β-Mo 2C被用作激活CO2的有效组分，并与Ni/γ-Al 2 O3协同用于等离子体辅助DRM反应。β-Mo 2C的加入促进了电荷沉积，并且发现由于Ni和β-Mo 2C之间的强相互作用，Ni纳米颗粒重新分散在β-Mo 2C表面上。机械混合的Mo_2C-Ni/Al_2O_3催化剂由于具有Ni-Mo_2C新的活性界面，与未掺杂的Ni/Al_2O_3催化剂相比，具有更好的活性和稳定性。本研究揭示了β-Mo 2C添加剂的关键作用，提供了实际的解决方案，以抑制碳沉积，从而提高等离子体辅助DRM反应的催化稳定性。
Non-thermal plasma (NTP) coupled with catalysis provides a way to enable the dry reforming of methane (DRM) reaction to occur at low temperatures. While assistance of NTP brings the negative issue of coke deposition due to the faster rate of CH4 dissociation induced by NTP. Herein, beta-Mo2C was employed as an effective component to activate CO2 and collaborated with Ni/gamma-Al2O3 for the plasma-assisted DRM reaction. Addition of beta-Mo2C facilitated the charge deposition, and Ni nanoparticles were found to re-disperse over the beta-Mo2C surface due to the strong interaction between Ni and beta-Mo2C. Benefiting from the new active interface of Ni-Mo2C, the mechanically mixed Mo2C-Ni/Al2O3 catalyst exhibited much better activity and stability as compared with the undoped Ni/Al2O3 catalyst. The present study reveals the crucial roles of beta-Mo2C additives, providing practical solutions to depress carbon deposition, and thereby enhance the catalytic stability in plasma-assisted DRM reaction.