Abstract: The effects of the nitrogen ligands,such as pyridine, methylpyridine, 2, 2 -bipyridine and ethylenediamine, on the activity and stability of the copper catalyst were investigated. The catalytic activities prepared by nitrogen ligand pretreatment decreased compared with the unpretreated support catalysts. This probably related to the disfavored effect of the coordination on the catalysts in a gas-solid reaction manner. The catalysts made by pyridine pretreatment and pore modified supports were superior to th...