A mechanistic basis for the effect of aluminum content on ethene selectivity in methanol-to-hydrocarbons conversion on HZSM-5

Handle URI:
http://hdl.handle.net/10754/623781
Title:
A mechanistic basis for the effect of aluminum content on ethene selectivity in methanol-to-hydrocarbons conversion on HZSM-5
Authors:
Khare, Rachit; Liu, Zhaohui; Han, Yu ( 0000-0003-1462-1118 ) ; Bhan, Aditya
Abstract:
Increasing crystallize size or aluminum content in MFI-type zeolites independently enhances the propagation of the aromatics-based methylation/dealkylation cycle relative to that of the olefins-based methylation/cracking cycle in methanol-to-hydrocarbons (MTH) conversion and consequentially results in higher ethene selectivity. Ethene selectivity increases monotonically with increasing aluminum content for HZSM-5 samples with nearly identical crystallite size consequent to an increase in the intracrystalline contact time analogous to our recent report detailing the effects of crystallite size (Khare et al., 2015) on MTH selectivity. The confected effects of crystallite size and site density on MTH selectivity can therefore, be correlated using a descriptor that represents the average number of acid sites that an olefin-precursor will interact with before elution.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Khare R, Liu Z, Han Y, Bhan A (2017) A mechanistic basis for the effect of aluminum content on ethene selectivity in methanol-to-hydrocarbons conversion on HZSM-5. Journal of Catalysis 348: 300–305. Available: http://dx.doi.org/10.1016/j.jcat.2017.02.022.
Publisher:
Elsevier BV
Journal:
Journal of Catalysis
Issue Date:
20-Mar-2017
DOI:
10.1016/j.jcat.2017.02.022
Type:
Article
ISSN:
0021-9517
Sponsors:
The authors acknowledge financial support from National Science Foundation (CBET 1055846) and King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors also acknowledge Mr. Brandon Foley, University of Minnesota, and Mr. Sukaran Arora, University of Minnesota, for help with catalyst preparation and the experimental setup.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0021951717300568
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorKhare, Rachiten
dc.contributor.authorLiu, Zhaohuien
dc.contributor.authorHan, Yuen
dc.contributor.authorBhan, Adityaen
dc.date.accessioned2017-05-31T11:23:04Z-
dc.date.available2017-05-31T11:23:04Z-
dc.date.issued2017-03-20en
dc.identifier.citationKhare R, Liu Z, Han Y, Bhan A (2017) A mechanistic basis for the effect of aluminum content on ethene selectivity in methanol-to-hydrocarbons conversion on HZSM-5. Journal of Catalysis 348: 300–305. Available: http://dx.doi.org/10.1016/j.jcat.2017.02.022.en
dc.identifier.issn0021-9517en
dc.identifier.doi10.1016/j.jcat.2017.02.022en
dc.identifier.urihttp://hdl.handle.net/10754/623781-
dc.description.abstractIncreasing crystallize size or aluminum content in MFI-type zeolites independently enhances the propagation of the aromatics-based methylation/dealkylation cycle relative to that of the olefins-based methylation/cracking cycle in methanol-to-hydrocarbons (MTH) conversion and consequentially results in higher ethene selectivity. Ethene selectivity increases monotonically with increasing aluminum content for HZSM-5 samples with nearly identical crystallite size consequent to an increase in the intracrystalline contact time analogous to our recent report detailing the effects of crystallite size (Khare et al., 2015) on MTH selectivity. The confected effects of crystallite size and site density on MTH selectivity can therefore, be correlated using a descriptor that represents the average number of acid sites that an olefin-precursor will interact with before elution.en
dc.description.sponsorshipThe authors acknowledge financial support from National Science Foundation (CBET 1055846) and King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors also acknowledge Mr. Brandon Foley, University of Minnesota, and Mr. Sukaran Arora, University of Minnesota, for help with catalyst preparation and the experimental setup.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0021951717300568en
dc.subjectMethanol-to-hydrocarbonsen
dc.subjectMethanol-to-olefinsen
dc.subjectZeolitesen
dc.subjectMFIen
dc.subjectZSM-5en
dc.subjectSilicon to aluminum ratioen
dc.subjectEthene selectivityen
dc.titleA mechanistic basis for the effect of aluminum content on ethene selectivity in methanol-to-hydrocarbons conversion on HZSM-5en
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalJournal of Catalysisen
dc.contributor.institutionDepartment of Chemical Engineering and Materials Science, University of Minnesota – Twin Cities, 421 Washington Avenue SE, Minneapolis, MN 55455, USAen
kaust.authorLiu, Zhaohuien
kaust.authorHan, Yuen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.