Effect of reaction conditions on methanol to gasoline conversion over nanocrystal ZSM-5 zeolite

Zhijian Wan, Gang Li, Chuanfu Wang, Hong Yang, Dongke Zhang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A nanocrystal ZSM-5 zeolite comprising uniform single crystal particles of ~100 nm in size was synthesised and characterised using XRD, ICP-AES, SEM, TEM, solid state MAS NMR and nitrogen physisorption techniques. The catalytic performance was tested in methanol to gasoline (MTG) conversion with a particular focus on the effect of reaction conditions, namely, temperature from 300 to 450 °C, pressure from 0.1 to 2.0 MPa and WHSV from 1 to 4 h-1. Temperature showed a significant impact. At temperatures ≤350 °C, methanol conversion did not complete while the catalyst was deactivated more rapidly. Increasing temperature to above 375 °C saw complete methanol conversion and durable catalyst activity. Further increasing the reaction temperature to above 400 °C reduced gasoline yield. Pressure mainly affected the product selectivity; a higher pressure led to a lower C1-C4 selectivity but enhanced durene formation. Further increasing pressure also favoured coke formation, leading to faster loss of catalyst activity. Likewise, increasing WHSV reduced C1-C4 selectivity but promoted the formation of durene and coke, resulting in a rapid deactivation of the catalyst. The optimal reaction conditions for this nanocrystal ZSM-5 catalyst in MTG were found to be 375 °C, 1.0 MPa and WHSV of 2 h-1.

Original languageEnglish
Pages (from-to)107-113
JournalCatalysis Today
Volume314
DOIs
Publication statusPublished - 15 Sep 2018

Fingerprint

Nanocrystals
Gasoline
Methanol
Coke
Catalysts
Catalyst activity
Temperature
Physisorption
Nitrogen
Nuclear magnetic resonance
ZSM-5 zeolite
Single crystals
Transmission electron microscopy
Scanning electron microscopy
durene

Cite this

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title = "Effect of reaction conditions on methanol to gasoline conversion over nanocrystal ZSM-5 zeolite",
abstract = "A nanocrystal ZSM-5 zeolite comprising uniform single crystal particles of ~100 nm in size was synthesised and characterised using XRD, ICP-AES, SEM, TEM, solid state MAS NMR and nitrogen physisorption techniques. The catalytic performance was tested in methanol to gasoline (MTG) conversion with a particular focus on the effect of reaction conditions, namely, temperature from 300 to 450 °C, pressure from 0.1 to 2.0 MPa and WHSV from 1 to 4 h-1. Temperature showed a significant impact. At temperatures ≤350 °C, methanol conversion did not complete while the catalyst was deactivated more rapidly. Increasing temperature to above 375 °C saw complete methanol conversion and durable catalyst activity. Further increasing the reaction temperature to above 400 °C reduced gasoline yield. Pressure mainly affected the product selectivity; a higher pressure led to a lower C1-C4 selectivity but enhanced durene formation. Further increasing pressure also favoured coke formation, leading to faster loss of catalyst activity. Likewise, increasing WHSV reduced C1-C4 selectivity but promoted the formation of durene and coke, resulting in a rapid deactivation of the catalyst. The optimal reaction conditions for this nanocrystal ZSM-5 catalyst in MTG were found to be 375 °C, 1.0 MPa and WHSV of 2 h-1.",
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Effect of reaction conditions on methanol to gasoline conversion over nanocrystal ZSM-5 zeolite. / Wan, Zhijian; Li, Gang; Wang, Chuanfu; Yang, Hong; Zhang, Dongke.

In: Catalysis Today, Vol. 314, 15.09.2018, p. 107-113.

Research output: Contribution to journalArticle

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AB - A nanocrystal ZSM-5 zeolite comprising uniform single crystal particles of ~100 nm in size was synthesised and characterised using XRD, ICP-AES, SEM, TEM, solid state MAS NMR and nitrogen physisorption techniques. The catalytic performance was tested in methanol to gasoline (MTG) conversion with a particular focus on the effect of reaction conditions, namely, temperature from 300 to 450 °C, pressure from 0.1 to 2.0 MPa and WHSV from 1 to 4 h-1. Temperature showed a significant impact. At temperatures ≤350 °C, methanol conversion did not complete while the catalyst was deactivated more rapidly. Increasing temperature to above 375 °C saw complete methanol conversion and durable catalyst activity. Further increasing the reaction temperature to above 400 °C reduced gasoline yield. Pressure mainly affected the product selectivity; a higher pressure led to a lower C1-C4 selectivity but enhanced durene formation. Further increasing pressure also favoured coke formation, leading to faster loss of catalyst activity. Likewise, increasing WHSV reduced C1-C4 selectivity but promoted the formation of durene and coke, resulting in a rapid deactivation of the catalyst. The optimal reaction conditions for this nanocrystal ZSM-5 catalyst in MTG were found to be 375 °C, 1.0 MPa and WHSV of 2 h-1.

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