Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature

Light olefins can be produced from CO2 hydrogenation in a single reactor using a combination of a methanol synthesis catalyst and a methanol-to-olefin (MTO) catalyst. However, commercial methanol synthesis catalysts are active at low temperatures (200–260 °C), while MTO reaction is feasible at highe...

Full description

Bibliographic Details
Main Authors:	Akkharaphatthawon, Naphattanun, Chanlek, Narong, Cheng, C. K., Chareonpanich, Metta, Limtrakul, Jumras, Witoon, Thongthai
Format:	Article
Language:	English
Published:	Elsevier 2019
Subjects:	QD Chemistry TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/1/Tuning%20adsorption%20properties%20of%20GaxIn2%E2%88%92xO3%20catalysts%20.pdf

id	ump-25373
recordtype	eprints
spelling	ump-253732019-10-25T03:40:29Z http://umpir.ump.edu.my/id/eprint/25373/ Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature Akkharaphatthawon, Naphattanun Chanlek, Narong Cheng, C. K. Chareonpanich, Metta Limtrakul, Jumras Witoon, Thongthai QD Chemistry TP Chemical technology Light olefins can be produced from CO2 hydrogenation in a single reactor using a combination of a methanol synthesis catalyst and a methanol-to-olefin (MTO) catalyst. However, commercial methanol synthesis catalysts are active at low temperatures (200–260 °C), while MTO reaction is feasible at higher temperatures (>300 °C). Herein, we report the CO2 hydrogenation to methanol at high temperatures (320–400 °C) over GaxIn2−xO3 catalysts. By tuning the Ga/In ratios, phase, crystallinity, pore structure, morphology, electronic properties as well as adsorptive properties of GaxIn2−xO3 catalysts can be modified. At the lowest temperature (320 °C), the pure In2O3 shows the highest methanol yield. However, the maximum methanol yield declines significantly with increasing reaction temperatures. Incorporation of Ga into the In2O3 crystal lattices at x = 0.4 (Ga0.4In1.6O3) maximizes the methanol yield at higher reaction temperatures of 340–360 °C. This enhancement can be attributed to an increased binding energy of adsorptive molecules with the catalyst surface to promote the hydrogenation of CO2 to methanol. Further increasing Ga content (x > 0.4) leads to greatly strengthen the binding for adsorptive molecules, resulting in a lower methanol yield and the formation of methane. The surface chemisorbed oxygen is found to be a key factor determining the CO yield. Elsevier 2019-09-30 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/25373/1/Tuning%20adsorption%20properties%20of%20GaxIn2%E2%88%92xO3%20catalysts%20.pdf Akkharaphatthawon, Naphattanun and Chanlek, Narong and Cheng, C. K. and Chareonpanich, Metta and Limtrakul, Jumras and Witoon, Thongthai (2019) Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature. Applied Surface Science, 489. pp. 278-286. ISSN 0169-4332 https://doi.org/10.1016/j.apsusc.2019.05.363 https://doi.org/10.1016/j.apsusc.2019.05.363
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QD Chemistry TP Chemical technology
spellingShingle	QD Chemistry TP Chemical technology Akkharaphatthawon, Naphattanun Chanlek, Narong Cheng, C. K. Chareonpanich, Metta Limtrakul, Jumras Witoon, Thongthai Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
description	Light olefins can be produced from CO2 hydrogenation in a single reactor using a combination of a methanol synthesis catalyst and a methanol-to-olefin (MTO) catalyst. However, commercial methanol synthesis catalysts are active at low temperatures (200–260 °C), while MTO reaction is feasible at higher temperatures (>300 °C). Herein, we report the CO2 hydrogenation to methanol at high temperatures (320–400 °C) over GaxIn2−xO3 catalysts. By tuning the Ga/In ratios, phase, crystallinity, pore structure, morphology, electronic properties as well as adsorptive properties of GaxIn2−xO3 catalysts can be modified. At the lowest temperature (320 °C), the pure In2O3 shows the highest methanol yield. However, the maximum methanol yield declines significantly with increasing reaction temperatures. Incorporation of Ga into the In2O3 crystal lattices at x = 0.4 (Ga0.4In1.6O3) maximizes the methanol yield at higher reaction temperatures of 340–360 °C. This enhancement can be attributed to an increased binding energy of adsorptive molecules with the catalyst surface to promote the hydrogenation of CO2 to methanol. Further increasing Ga content (x > 0.4) leads to greatly strengthen the binding for adsorptive molecules, resulting in a lower methanol yield and the formation of methane. The surface chemisorbed oxygen is found to be a key factor determining the CO yield.
format	Article
author	Akkharaphatthawon, Naphattanun Chanlek, Narong Cheng, C. K. Chareonpanich, Metta Limtrakul, Jumras Witoon, Thongthai
author_facet	Akkharaphatthawon, Naphattanun Chanlek, Narong Cheng, C. K. Chareonpanich, Metta Limtrakul, Jumras Witoon, Thongthai
author_sort	Akkharaphatthawon, Naphattanun
title	Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
title_short	Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
title_full	Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
title_fullStr	Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
title_full_unstemmed	Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature
title_sort	tuning adsorption properties of gaxin2−xo3 catalysts for enhancement of methanol synthesis activity from co2 hydrogenation at high reaction temperature
publisher	Elsevier
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/ http://umpir.ump.edu.my/id/eprint/25373/1/Tuning%20adsorption%20properties%20of%20GaxIn2%E2%88%92xO3%20catalysts%20.pdf
first_indexed	2023-09-18T22:38:55Z
last_indexed	2023-09-18T22:38:55Z
_version_	1777416783237480448

Tuning adsorption properties of GaxIn2−xO3 catalysts for enhancement of methanol synthesis activity from CO2 hydrogenation at high reaction temperature

Similar Items