TY - JOUR
T1 - Ga-Supported MFI Zeolites Synthesized Using Carbon Nanotubes Containing Gallium Oxide Nanoparticles on Exterior Walls and in Interior Channels as Hard Templates for Methanol Aromatization
AU - Chang, Ching Jung
AU - Chen, Chin Han
AU - Lee, Jyh Fu
AU - Sooknoi, Tawan
AU - Lin, Yu Chuan
N1 - Funding Information:
This study was supported by the Ministry of Science and Technology (Projects 106-2221-E-006-188-MY3) and Taiwan’s Deep Decarbonization Pathways toward a Sustainable Society (Project AS-KPQ-106-DDPP). The authors also appreciate Mr. Raju Kumar and Prof. Po-Wen Chung (Institute of Chemistry, Academia Sinica) for physisorption analysis.
Funding Information:
This study was supported by the Ministry of Science and Technology (Projects 106-2221-E-006-188-MY3) and Taiwan?s Deep Decarbonization Pathways toward a Sustainable Society (Project AS-KPQ-106-DDPP). The authors also appreciate Mr. Raju Kumar and Prof. Po-Wen Chung (Institute of Chemistry, Academia Sinica) for physisorption analysis.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/6/17
Y1 - 2020/6/17
N2 - A combinative approach of steam-assisted crystallization and hard templating was employed to prepare mesostructured Ga/ZSM-5 catalysts. Carbon nanotubes (CNTs) containing gallium oxide nanoparticles supported on the exterior surface and confined in the inner space were used as the templates. A comparative study showed that by using these two templates, the crystallinities, mesoporosities, and Ga coordination environments of mesostructured Ga/ZSM-5 catalysts were similar. However, a greater strength of Lewis acid of Ga/ZSM-5 was obtained using the GaOx-encapsulated CNTs as the template. Encapsulated GaOx was less reducible than those supported on the exterior surface of the CNTs, resulting in an increased concentration of isolated (GaO)+. Moreover, compared to pristine ZSM-5, the concentration of Brønsted acid was nearly intact by using GaOx-encapsulated CNTs as the templates. A better methanol aromatization performance was achieved by the Ga/ZSM-5 made by using GaOx-encapsulated CNTs.
AB - A combinative approach of steam-assisted crystallization and hard templating was employed to prepare mesostructured Ga/ZSM-5 catalysts. Carbon nanotubes (CNTs) containing gallium oxide nanoparticles supported on the exterior surface and confined in the inner space were used as the templates. A comparative study showed that by using these two templates, the crystallinities, mesoporosities, and Ga coordination environments of mesostructured Ga/ZSM-5 catalysts were similar. However, a greater strength of Lewis acid of Ga/ZSM-5 was obtained using the GaOx-encapsulated CNTs as the template. Encapsulated GaOx was less reducible than those supported on the exterior surface of the CNTs, resulting in an increased concentration of isolated (GaO)+. Moreover, compared to pristine ZSM-5, the concentration of Brønsted acid was nearly intact by using GaOx-encapsulated CNTs as the templates. A better methanol aromatization performance was achieved by the Ga/ZSM-5 made by using GaOx-encapsulated CNTs.
UR - https://www.scopus.com/pages/publications/85090039282
UR - https://www.scopus.com/pages/publications/85090039282#tab=citedBy
U2 - 10.1021/acs.iecr.0c01628
DO - 10.1021/acs.iecr.0c01628
M3 - Article
AN - SCOPUS:85090039282
SN - 0888-5885
VL - 59
SP - 11177
EP - 11186
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 24
ER -