dc.contributor.author | Ali, Daniel | |
dc.contributor.author | Zeiger, Caren | |
dc.contributor.author | Azim, Muhammad Mohsin | |
dc.contributor.author | Lein, Hilde Lea | |
dc.contributor.author | Mathisen, Karina | |
dc.date.accessioned | 2020-08-19T07:29:00Z | |
dc.date.available | 2020-08-19T07:29:00Z | |
dc.date.created | 2020-08-18T12:27:36Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 1387-1811 | |
dc.identifier.uri | https://hdl.handle.net/11250/2672900 | |
dc.description.abstract | Hierarchical SAPO-5 molecular sieves were synthesized with three different mesopore structure-directing agents
(meso-SDAs) (cetyltrimethylammonium bromide (CTAB), myristyltrimethylammonium bromide (MTMAB) and
[3-(trimethoxysilyl)propyl] dimethyloctadecylammonium chloride (TPOAC)) based on a soft-template hydrothermal synthesis procedure. To investigate the modified porosity of the hierarchical SAPO-5s, they were
characterized thoroughly with the results being compared to the conventional microporous SAPO-5. Nitrogen
sorption measurements revealed considerable hysteresis loops for the hierarchical SAPO-5s as well as larger
mesopore volumes (�0.15 cm3 g-1) compared to the conventional SAPO-5 (0.05 cm3 g-1). The relative number of
acid sites for each sample was calculated from FTIR adsorption data and was in the order of C-SAPO-5>HCTAB>H-MTMAB>H-TPOAC. The hierarchical SAPO-5s had a significantly increased lifetime (>150 h) in the
methanol to hydrocarbons (MTH) model reaction compared to the conventional SAPO-5 (<10 h), with TPOAC
producing the most stable catalyst and MTMAB producing the catalyst with the largest product distribution. The
modified porosity of the hierarchical SAPO-5s was additionally verified by an enhanced lifetime and increased
production of large products in a shape selective process as well as a lower rate of coke formation compared to
the conventional SAPO-5. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Evaluation of surfactant templates for one-pot hydrothermal synthesis of hierarchical SAPO-5 | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.journal | Microporous and Mesoporous Materials | en_US |
dc.identifier.doi | 10.1016/j.micromeso.2020.110364 | |
dc.identifier.cristin | 1823809 | |
dc.description.localcode | Available online 20 June 2020 1387-1811/© 2020 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |