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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...

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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/25373/1/Tuning%20adsorption%20properties%20of%20GaxIn2%E2%88%92xO3%20catalysts%20.pdf
http://umpir.ump.edu.my/id/eprint/25373/
https://doi.org/10.1016/j.apsusc.2019.05.363
https://doi.org/10.1016/j.apsusc.2019.05.363
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spelling my.ump.umpir.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
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
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/25373/1/Tuning%20adsorption%20properties%20of%20GaxIn2%E2%88%92xO3%20catalysts%20.pdf
http://umpir.ump.edu.my/id/eprint/25373/
https://doi.org/10.1016/j.apsusc.2019.05.363
https://doi.org/10.1016/j.apsusc.2019.05.363
_version_ 1648741195245944832
score 13.211869

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