LIU Yahua, LI Yang, WANG Ke, et al. Regeneration of zeolite catalyst for dimethyl ether carbonylation[J]. CIESC Journal, 2017, (10): 3816-3822.DOI: 10.11949/j.issn.0438-1157.20170489.
The H-MOR zeolite catalysts were prepared by hydrothermal synthesis.An inactivated catalyst which was used in dimthyl ether carbonylaiton was regenerated.The effects of gas
coke-burning temperature
O2 volume fraction and heating rate on the coke-burning process were investigated.The results of TPO and XRD analysis showed that there was different property coke on the inactivated catalyst.In the optimum conditions for the coke-burning of the inactivated catalyst
temperature 550℃
heating rate of 2℃·min-1 and O2 volume fraction of 3%
the catalyst activity was almost completely restored.The fresh and regenerated catalysts were characterized by means of NH3-TPD and N2 adsorption-desorption.The results showed that the coke was removed cleanly and channels were protected in the optimum condition.