Kinetic Study of Nonthermal Plasma Activated Catalytic CO2 Hydrogenation over Ni Supported on Silica Catalyst

• DOI: 10.1021/acs.iecr.0c01477
• Publication Date: 2020-04-27T22:51:15Z
• Authors: Yibing Mu; Shaojun Xu; Yan Shao; Huanhao Chen; Christopher Hardacre; Xiaolei Fan
• Keywords: Nonthermal plasma

Nonthermal plasma (NTP) is a promising alternative to conventional thermal activation for promoting efficient heterogeneous catalysis under ambient conditions. However, full understanding of the hybrid NTP catalyst system challenging due its complexity. Herein, using catalytic CO2 hydrogenation over Ni@SiO2 as model system, we carried out comparative kinetic studies both and conditions assess reaction dynamics kinetics, aimed at interactions between surface. Specifically, performance process parameters was evaluated by varying temperature, total flow rate, partial pressure H2, dielectric barrier discharge (DBD) power. Kinetic showed that, conditions, exhibited non-Arrhenius behavior likely complex Ni catalyst, showing linear correlation natural logarithmic turnover frequency (TOF) reciprocal DBD power (instead bulk reactor temperature measured). Additionally, used, energy independent feed rate (at ∼29 kJ mol–1, being significantly lower than that (∼80 mol–1). suggested dissociated H species in gas phase are ready interact with surfaces, thus reducing required enable surface reactions.