TY - JOUR

T1 - Methanol-to-Olefinsin a Membrane Reactor with in situ Steam Removal – The Decisive Role of Coking

AU - Rieck genannt Best, Felix

AU - Mundstock, Alexander

AU - Dräger, Gerald

AU - Rusch, Pascal

AU - Bigall, Nadja C.

AU - Richter, Hannes

AU - Caro, Jürgen

N1 - Funding Information: Jürgen Caro and Felix Rieck genannt Best thank the Deutsche Forschungsgemeinschaft (DFG), grant CA147/21-1, project number 322911753, for supporting this work. Pascal Rusch and Nadja C. Bigall thank the European Research Council (ERC) for financial support (grant agreement no. 714429). We further thank Frank Steinbach for the help during the preparation and measurement of the SEM samples and Zhogmin Liu from the Dalian Institute of Chemical Physics for providing the catalyst.

PY - 2020/1/9

Y1 - 2020/1/9

N2 - The reaction of methanol to light olefins and water (MTO) was studied in a fixed bed tubular membrane reactor using commercial SAPO-34 catalyst. In the fixed bed reactor without membrane support, the MTO reaction collapsed after 3 h time on stream. However, if the reaction by-product steam is in situ extracted from the reactor through a hydrophilic tubular LTA membrane, the reactor produces long-term stable about 60 % ethene and 10 % propene. It is shown that the reason for the superior performance of the membrane-assisted reactor is not the prevention of catalyst damage caused by steam but the influence of the water removal on the formation of different carbonaceous residues inside the SAPO-34 cages. Catalytically beneficial methylated 1 or 2 ring aromatics have been found in a higher percentage in the MTO reaction with a water removal membrane compared to the MTO reaction without membrane support.

AB - The reaction of methanol to light olefins and water (MTO) was studied in a fixed bed tubular membrane reactor using commercial SAPO-34 catalyst. In the fixed bed reactor without membrane support, the MTO reaction collapsed after 3 h time on stream. However, if the reaction by-product steam is in situ extracted from the reactor through a hydrophilic tubular LTA membrane, the reactor produces long-term stable about 60 % ethene and 10 % propene. It is shown that the reason for the superior performance of the membrane-assisted reactor is not the prevention of catalyst damage caused by steam but the influence of the water removal on the formation of different carbonaceous residues inside the SAPO-34 cages. Catalytically beneficial methylated 1 or 2 ring aromatics have been found in a higher percentage in the MTO reaction with a water removal membrane compared to the MTO reaction without membrane support.

UR - http://www.scopus.com/inward/record.url?scp=85076118763&partnerID=8YFLogxK

U2 - 10.1002/cctc.201901222

DO - 10.1002/cctc.201901222

M3 - Article

AN - SCOPUS:85076118763

VL - 12

SP - 273

EP - 280

JO - CHEMCATCHEM

JF - CHEMCATCHEM

SN - 1867-3880

IS - 1

ER -