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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) / Kohji Omata in Industrial & engineering chemistry research, Vol. 48 N° 13 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6256–6261 Titre : Artificial neural network (ANN)-aided optimization of ZSM-5 catalyst for the dimethyl ether to olefin (DTO) reaction from neat dimethyl ether (DME) Type de document : texte imprimé Auteurs : Kohji Omata, Auteur ; Yuichiro Yamazaki, Auteur ; Yuhsuke Watanabe, Auteur Année de publication : 2009 Article en page(s) : pp. 6256–6261 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : ZSM-5  catalyst  Dimethyl  ether  Olefin Résumé : 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 ratio on the activity of calcium-incorporated ZSM-5 were examined, additives were screened using the physicochemical properties of the additive elements and an artificial neural network. The addition of boron or phosphorus to ZSM-5 improved the catalyst life. The catalyst composition such as Si/Al, Si/Ca, Si/P, and Si/B was then optimized for longer catalyst life, using an L9 orthogonal array and an artificial neural network (ANN). Grid search was applied to find the maximum catalyst life. The catalyst life of H−Ca-ZSM-5 (Si/Al = 250, Si/Ca = 20, Si/P = 400, Si/B = 200) was 146 h when Neat-DTO was performed at 803 K and GHSV = 1000 h−1. The life is comparable to that of the catalyst supplied to Diluted-DTO. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801757p [article] Artificial neural network (ANN)-aided optimization of ZSM-5 catalyst for the dimethyl ether to olefin (DTO) reaction from neat dimethyl ether (DME) [texte imprimé] / Kohji Omata, Auteur ; Yuichiro Yamazaki, Auteur ; Yuhsuke Watanabe, Auteur . - 2009 . - pp. 6256–6261. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6256–6261 Mots-clés : ZSM-5  catalyst  Dimethyl  ether  Olefin Résumé : 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 ratio on the activity of calcium-incorporated ZSM-5 were examined, additives were screened using the physicochemical properties of the additive elements and an artificial neural network. The addition of boron or phosphorus to ZSM-5 improved the catalyst life. The catalyst composition such as Si/Al, Si/Ca, Si/P, and Si/B was then optimized for longer catalyst life, using an L9 orthogonal array and an artificial neural network (ANN). Grid search was applied to find the maximum catalyst life. The catalyst life of H−Ca-ZSM-5 (Si/Al = 250, Si/Ca = 20, Si/P = 400, Si/B = 200) was 146 h when Neat-DTO was performed at 803 K and GHSV = 1000 h−1. The life is comparable to that of the catalyst supplied to Diluted-DTO. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801757p