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Deactivation Kinetics for the Carbonylation of Dimethyl Ether to Methyl Acetate on H-MOR
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-11-03 00:00:00 , DOI: 10.1021/acs.iecr.7b03500 Zaizhe Cheng 1 , Shouying Huang 1 , Ying Li 1 , Jing Lv 1 , Kai Cai 1 , Xinbin Ma 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-11-03 00:00:00 , DOI: 10.1021/acs.iecr.7b03500 Zaizhe Cheng 1 , Shouying Huang 1 , Ying Li 1 , Jing Lv 1 , Kai Cai 1 , Xinbin Ma 1
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The carbonylation of dimethyl ether (DME) to methyl acetate (MA) is one of the crucial steps in an indirect synthesis route of ethanol from syngas (CO+H2). The H-MOR zeolite exhibits excellent activity and selectivity at mild conditions. However, the catalyst suffers rapid deactivation due to the carbonaceous deposits on Brønsted acid sites. In this study, the deactivation kinetics for the carbonylation of DME to MA on the H-MOR zeolite was investigated. Based on the fitting results and in situ FTIR analysis, a model taking into account the composition concentration was established. This deactivation kinetic model allows simulating the concentration of different compounds in the reaction medium with time on stream under different experimental conditions. In this model, coke is considered to be derived from DME and CO. Moreover, CO remarkably accelerates the coke formation, and the effect of its concentration on the deactivation rate is quantified. The establishment of deactivation kinetics will be conductive to elucidate the coke formation mechanism and optimize the process conditions.
中文翻译：
H-MOR上二甲醚羰基化为乙酸甲酯的失活动力学
二甲醚（DME）羰基化为乙酸甲酯（MA）是乙醇从合成气（CO + H 2）间接合成路线中的关键步骤之一。H-MOR沸石在温和条件下具有出色的活性和选择性。但是，由于布朗斯台德酸位上的碳质沉积物，催化剂会迅速失活。在这项研究中，研究了在H-MOR沸石上DME羰基化成MA的失活动力学。根据拟合结果和原位建立了FTIR分析模型，该模型考虑了成分浓度。这种失活动力学模型允许在不同的实验条件下，随着时间的流逝模拟反应介质中不同化合物的浓度。在该模型中，焦炭被认为是源自DME和CO。此外，CO显着加速了焦炭的形成，并量化了其浓度对失活速率的影响。失活动力学的建立将有助于阐明焦炭形成机理并优化工艺条件。
更新日期：2017-11-03
中文翻译：
H-MOR上二甲醚羰基化为乙酸甲酯的失活动力学
二甲醚（DME）羰基化为乙酸甲酯（MA）是乙醇从合成气（CO + H 2）间接合成路线中的关键步骤之一。H-MOR沸石在温和条件下具有出色的活性和选择性。但是，由于布朗斯台德酸位上的碳质沉积物，催化剂会迅速失活。在这项研究中，研究了在H-MOR沸石上DME羰基化成MA的失活动力学。根据拟合结果和原位建立了FTIR分析模型，该模型考虑了成分浓度。这种失活动力学模型允许在不同的实验条件下，随着时间的流逝模拟反应介质中不同化合物的浓度。在该模型中，焦炭被认为是源自DME和CO。此外，CO显着加速了焦炭的形成，并量化了其浓度对失活速率的影响。失活动力学的建立将有助于阐明焦炭形成机理并优化工艺条件。
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