2009
DOI: 10.1021/ie801757p
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Artificial Neural Network (ANN)-Aided Optimization of ZSM-5 Catalyst for the Dimethyl Ether to Olefin (DTO) Reaction from Neat Dimethyl Ether (DME)

Abstract: A ZSM-5 catalyst for light olefin synthesis from dimethyl ether (the reaction of dimethyl ether (DME) to olefin, abbreviated as DTO) was developed. In comparison with the reaction of DTO from diluted dimethyl ether (abbreviated as Diluted-DTO), lower light olefin selectivity and shorter catalyst life are the drawbacks of the reaction of DTO from neat (90 vol %) DME (abbreviated as Neat-DTO). After the effects of Si/Al ratio of zeolite, DME concentration, gas hourly space velocity (GHSV) of gas feed, and Si/Al … Show more

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Cited by 29 publications
(12 citation statements)
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“…As alluded to above, both A200F50 MC and A200F50 HT converted >99% of DME and produced light olefins mainly consisting of propene and butene with >30% selectivity within 112 h. However, A200F50 HT gradually lost its catalytic activity and was almost completely deactivated at a TOS of 136 h owing to coke deposition . In stark contrast, at that time, A200F50 MC still exhibited 92% conversion of DME with 44% selectivity of light olefins and preserved such high catalytic performance as to convert >50% of DME up to TOS of 217 h. The density and strength of acid sites are known to be key parameters for catalytic activity and lifetime in the DTO reaction, , but the parameters of A200F50 MC and A200F50 HT are comparable, as shown by the NH 3 -TPD measurement (Figure S10). This suggests that there is another important factor affecting catalytic performance.…”
Section: Resultsmentioning
confidence: 94%
“…As alluded to above, both A200F50 MC and A200F50 HT converted >99% of DME and produced light olefins mainly consisting of propene and butene with >30% selectivity within 112 h. However, A200F50 HT gradually lost its catalytic activity and was almost completely deactivated at a TOS of 136 h owing to coke deposition . In stark contrast, at that time, A200F50 MC still exhibited 92% conversion of DME with 44% selectivity of light olefins and preserved such high catalytic performance as to convert >50% of DME up to TOS of 217 h. The density and strength of acid sites are known to be key parameters for catalytic activity and lifetime in the DTO reaction, , but the parameters of A200F50 MC and A200F50 HT are comparable, as shown by the NH 3 -TPD measurement (Figure S10). This suggests that there is another important factor affecting catalytic performance.…”
Section: Resultsmentioning
confidence: 94%
“…Calcium doping was used for the methanol (or dimethyl ether, DME) to olefin process and at certain Ca loadings it allowed a significant increase of the catalyst stability. [20][21][22] Modification with Ag, Cu and Ni was found to enhance the selectivity of methanol to C6-C11 aromatic products. 23 It was reported that doping of HZSM-5 with Ni allows for an improvement of catalyst stability against coke formation in the transformation of bioethanol into olefins.…”
Section: Introductionmentioning
confidence: 99%
“…The general model-aided process design has been investigated in recent years with emerging applications in catalysis [19,20,21,17,22,23,24,25,26,27]. The main components in these previous reports include quantitative property activity relationship (QSAR), genetic algorithms (GA) and artificial neural network (ANN), generally based on high-throughput experimentation (HTE).…”
Section: Introductionmentioning
confidence: 99%