Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220503.doi: 10.7503/cjcu20220503

• Physical Chemistry • Previous Articles     Next Articles

5Ni-5La/SiO2 Catalysts Prepared by Dielectric Barrier Discharge Plasma Applying in the Dry Reforming of Methane

WANG Yazhi, JIA Xianzhi, ZHANG Honggang, LIU Lu, ZHAO Binran()   

  1. International Scientific & Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources,Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy,School of Chemical Engineering,Northwest University,Xi’an 710069,China
  • Received:2022-07-28 Online:2023-02-10 Published:2022-10-12
  • Contact: ZHAO Binran E-mail:zhaobr3636@126.com
  • Supported by:
    the Shaanxi Provincial Key Research and Development Program, China(2020ZDLGY11-06);the National Natural Science Foundation of China(21406177)

Abstract:

Ni-La catalysts were prepared using dielectric barrier discharge plasma method and applied in the dry reforming of methane. CH4 conversion and CO2 conversion for the plasma-treated catalysts were 81.2% and 88.4%, respectively, and the catalyst remained stable within 30 h. While for conventional catalyst, the initial conversion rates of CH4 and CO2 were 81% and 88.4%, respectively, which finally decreased to 58.8% and 68.6% after 30 h. Thus, the stability of the catalyst prepared by the plasma method was significantly improved. The characterization results showed that the catalyst prepared by dielectric barrier discharge plasma has higher dispersion and stronger Ni-La2O3 interaction. The plasma treatment increased the electron density around Ni, which could enhance the adsorption and activation of CO2 on the surface of the catalyst, promote the formation of HCOO- intermediates, and facilitate the positive progress of the reaction.

Key words: Plasma, Methane dry reforming, Nickel-based catalyst, La2O3

CLC Number: 

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