Dimethyl Ether Carbonylation to Methyl Acetate over Nanosized Mordenites

Abstract

Nanosized mordenites were found to show significantly enhanced reaction efficiency in dimethyl ether (DME) carbonylation to methyl acetate (MA) because of a greatly facilitated diffusion process. Copper incorporation into the channels of the nanosized mordenites further promoted the reaction rate, selectivity, and stability. Moreover, upon the addition of a small amount of H 2 (5−19 vol %) to the feed gas, deactivation was suppressed during DME carbonylation, whereas the catalyst stability and rate of formation of MA increased.

Highly active Ce, Y, La-modified Cu/SiO2 catalysts for hydrogenation of methyl acetate to ethanol

“…[1][2][3] This process consists of two stages: DME carbonylation to methyl acetate (MA) over zeolites and MA to ethanol over copper based catalysts. [4][5][6][7][8] The rst step acquired higher activity and stability over mordenite, while the second step employed cheap copper catalysts since they possess selective hydrogenation ability. 9,10 The Cu/SiO 2 catalyst is typically used for MA hydrogenation mainly because of the non-reducible and relatively inert behavior and low cost of the catalyst, making it suitable for industrial development.…”

Mordenite Nanorods Prepared by an Inexpensive Pyrrolidine‐based Mesoporogen for Alkane Hydroisomerization

“…Generally, organosilanes and mono‐ or multi‐quaternary ammonium salts have been employed to introduce mesoporosity in MOR zeolite. Nearly all of the described recipes involve the addition of a mesoporogen to a synthesis mixture which contains seeds, conventional SDAs, or require complex cationic surfactants with two or more ammonium ions . There are only few reports that claim the formation of hierarchical MOR zeolite with a mono‐quaternary ammonium surfactant or aniline as a single SDA .…”

Reaction mechanism of dimethyl ether carbonylation to methyl acetate over mordenite – a combined DFT/experimental study

“…[19][20][21] However, the zeolite catalysts suffer from rapid deactivation due to build-up of coke and large carbonaceous species within the zeolite pores. [21][22][23][24][25] The framework of mordenite contains two types of cavities: eightmembered ring (8-MR) side pockets and 12-MR main channels. It has been reported that MA synthesis takes place in the 8-MR, 26,27 whereas the 12-MR have been suggested to be responsible for the coke formation that leads to catalyst deactivation.…”