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Dual catalyst bed for the oxidation of CH 4 simultaneously to C 2 H 4 and syngas
Author(s) -
Hu Changwei,
Wu Jingjing,
Zhang Haili,
Qin Song
Publication year - 2007
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11326
Subject(s) - catalysis , syngas , oxidative coupling of methane , methane , hydroformylation , yield (engineering) , chemistry , partial oxidation , ethylene , hydrocarbon , chemical engineering , inorganic chemistry , nuclear chemistry , rhodium , materials science , organic chemistry , metallurgy , engineering
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 O 2 on the first catalyst bed, the moderately active catalyst Co/γ‐Al 2 O 3 for methane partial oxidation was employed, followed by Na 2 WO 4 /Mn/SiO 2 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/H 2 /C 2 H 4 = 1.1/1/1.2 was achieved, with the total yield of CO and C 2 H 4 of about 18.5%, under the following optimized conditions: F = 150 cm 3 /min, CH 4 /O 2 = 3, M 1 : M 2 = 0.01 g:0.16 g (1: Co/γ‐Al 2 O 3 ; 2: Na 2 WO 4 /Mn/SiO 2 ). © 2007 American Institute of Chemical Engineers AIChE J, 2007