Dual catalyst bed for the oxidation of CH4 simultaneously to C2H4 and syngas

Authors

  • Changwei Hu,

    Corresponding author
    1. Key Laboratory of Green Chemistry and Technology (Sichuan University), Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
    • Key Laboratory of Green Chemistry and Technology (Sichuan University), Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
    Search for more papers by this author
  • Jingjing Wu,

    1. Key Laboratory of Green Chemistry and Technology (Sichuan University), Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
    Search for more papers by this author
  • Haili Zhang,

    1. Key Laboratory of Green Chemistry and Technology (Sichuan University), Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
    Current affiliation:
    1. College of Science, Tianjin University of Science and Technology, Tianjin 300222, China
    Search for more papers by this author
  • Song Qin

    1. Key Laboratory of Green Chemistry and Technology (Sichuan University), Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
    Search for more papers by this author

Abstract

Dual catalyst bed system was introduced into the conversion of methane in one reactor simultaneously to ethylene and syngas with appropriate concentrations, which could be used for further production of propanal via hydroformylation. To avoid the over consumption of O2 on the first catalyst bed, the moderately active catalyst Co/γ-Al2O3 for methane partial oxidation was employed, followed by Na2WO4/Mn/SiO2 catalyst, which was one of the most effective catalysts for the oxidative coupling of methane. The distribution of products could be tuned by controlling the relative dosages of the two catalysts and the reaction conditions. A mixture with the desired composition of CO/H2/C2H4 = 1.1/1/1.2 was achieved, with the total yield of CO and C2H4 of about 18.5%, under the following optimized conditions: F = 150 cm3/min, CH4/O2 = 3, M1:M2 = 0.01 g:0.16 g (1: Co/γ-Al2O3; 2: Na2WO4/Mn/SiO2). © 2007 American Institute of Chemical Engineers AIChE J, 2007

Ancillary