摘要
The oxidative coupling of methane(OCM)involves directly converting methane to C_(2+)hydrocarbons(such as ethylene and ethane)via a reaction with oxygen.This study elucidated the effect of the calcination temperature on the structure and catalytic performance of potassium-doped-cobalt oxide supported on an alumina(K-Co/Al2O3)catalyst for the OCM reaction.The catalyst was highly active at relatively low reactor temperatures(500-640℃).Four calcination temperatures(400,500,600,and 700℃)were investigated,with the results showing that the calcination temperature strongly affected catalytic properties,such as the crystalline phases,elemental distribution,physical properties,and catalytic basicity,leading to a wide range in catalytic performances.The catalyst calcined at 400℃ was superior among the catalysts,with 8.3%C_(2+)yield,24.8%C_(2+)selectivity,and 33.6%CH4 conversion at 640℃.Furthermore,the catalyst was robust over 24 h of testing.
基金
supported by:the National Research Council of Thailand through the Fundamental Fund under the Kasetsart University Research and Development Institute(KURDI),Bangkok,Thailand,through Grant No.FF(KU)38.67
the Center of Excellence on Petrochemical and Materials Technology
and the National Research Council of Thailand through the Research Team Promotion Grant/Senior Research Scholar(Grant No.N42A640324)
support by the Austrian Science Fund(FWF
SFB TACO F81-P08).
