LI Zhenhua, XU Genhui, WANG Baowei, et al. DEACTIVATION MECHANISM OF DIETHYL OXALATE SYNTHESIS BY VAPOR PHASE CATALYTIC COUPLING REACTION OF CO AFTER INTRODUCTION OF HYDROGEN[J]. CIESC Journal, 2003, (1): 59-63.
LI Zhenhua, XU Genhui, WANG Baowei, et al. DEACTIVATION MECHANISM OF DIETHYL OXALATE SYNTHESIS BY VAPOR PHASE CATALYTIC COUPLING REACTION OF CO AFTER INTRODUCTION OF HYDROGEN[J]. CIESC Journal, 2003, (1): 59-63.DOI:
the effects of hydrogen on CO coupling reaction to diethyl oxalate at different hydrogen concentrations
reaction temperatures and residence times are studied. The results show that after introduction of hydrogen
CO conversion
selectivity and STY of diethyl oxalate all decrease with the increase of hydrogen concentration and reaction temperature. The deactivation kinetics of CO coupling reaction after introduction of hydrogen is obtained as follows:-da/dt=kdc0.65H2. According to this kinetic model the deactivation mechanism of the catalyst is further discussed. It is found that the co-adsorption of hydrogen and CO on the same active site of the catalyst occurrs.Adsorption of hydrogen will decrease the adsorption of CO on the catalyst and then decrease the formation rate of diethyl oxalate