Rieck Genannt Best Felix, Mundstock Alexander, Dräger Gerald, Rusch Pascal, Bigall Nadja C, Richter Hannes, Caro Jürgen
Institute for Physical Chemistry and Electrochemistry Leibniz University Hannover Callinstraße 3 A Hannover 30167 Germany.
Institute for Organic Chemistry Leibniz University Hannover Schneiderberg 1B Hannover 30167 Germany.
ChemCatChem. 2020 Jan 8;12(1):273-280. doi: 10.1002/cctc.201901222. Epub 2019 Nov 25.
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.
采用商用SAPO - 34催化剂，在固定床管式膜反应器中研究了甲醇制轻质烯烃和水（MTO）的反应。在没有膜支撑的固定床反应器中，MTO反应在运行3小时后就崩溃了。然而，如果反应副产物蒸汽通过亲水性管状LTA膜从反应器中就地提取出来，该反应器就能长期稳定地生产出约60%的乙烯和10%的丙烯。结果表明，膜辅助反应器性能优越的原因不是防止蒸汽对催化剂的损害，而是水的去除对SAPO - 34笼内不同碳质残留物形成的影响。与没有膜支撑的MTO反应相比，在有脱水膜的MTO反应中发现催化有益的甲基化单环或双环芳烃的比例更高。
