Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts

A novel chemical looping cracking–gasification process was investigated to produce separate H2 and syngas from plastic-derived pyrolysis gas over synthetic Ni–Fe–Al redox catalysts. The non-condensable pyrolysis gas was catalytically cracked at 800 °C, followed by catalyst regeneration with steam. T...

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Main Authors: Huang, Jijiang, Veksha, Andrei, Foo, Thaddeus Jin Jun, Lisak, Grzegorz
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/162172
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1621722022-10-07T05:20:09Z Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts Huang, Jijiang Veksha, Andrei Foo, Thaddeus Jin Jun Lisak, Grzegorz School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Civil engineering Waste Plastic Pyrolysis Gas A novel chemical looping cracking–gasification process was investigated to produce separate H2 and syngas from plastic-derived pyrolysis gas over synthetic Ni–Fe–Al redox catalysts. The non-condensable pyrolysis gas was catalytically cracked at 800 °C, followed by catalyst regeneration with steam. The highest activity was obtained over NiFeAl (molar Ni:Fe:Al = 1:1:1), producing concentrated H2 (83.1 vol%, 0.46 mol g(Ni+Fe)−1) and coke intermediate (232.1 wt%) from cracking. During the steam gasification stage, coke removal efficiency of 96% was obtained with a high syngas yield of 0.89 mol g(Ni+Fe)−1. With equimolar Ni/Fe, increasing Al/(Ni+Fe) ratio led to decreased catalyst activity due to enhanced metal–support interaction. Plausible reaction mechanisms were proposed to interpret the catalytic effects on tuning the morphologies, chemical structure and activity of the coke deposits. This work demonstrates the important role of Ni–Fe–Al catalysts on the production of H2 and syngas via chemical looping cracking–gasification process. Economic Development Board (EDB) Nanyang Technological University The authors would like to acknowledge the Nanyang Environment and Water Research Institute, Nanyang Technological University (Singapore) and Economic Development Board (Singapore) for financial support of this research. 2022-10-07T05:20:09Z 2022-10-07T05:20:09Z 2022 Journal Article Huang, J., Veksha, A., Foo, T. J. J. & Lisak, G. (2022). Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts. Chemical Engineering Journal, 438, 135580-. https://dx.doi.org/10.1016/j.cej.2022.135580 1385-8947 https://hdl.handle.net/10356/162172 10.1016/j.cej.2022.135580 2-s2.0-85125784017 438 135580 en Chemical Engineering Journal © 2022 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Waste Plastic
Pyrolysis Gas
spellingShingle Engineering::Civil engineering
Waste Plastic
Pyrolysis Gas
Huang, Jijiang
Veksha, Andrei
Foo, Thaddeus Jin Jun
Lisak, Grzegorz
Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
description A novel chemical looping cracking–gasification process was investigated to produce separate H2 and syngas from plastic-derived pyrolysis gas over synthetic Ni–Fe–Al redox catalysts. The non-condensable pyrolysis gas was catalytically cracked at 800 °C, followed by catalyst regeneration with steam. The highest activity was obtained over NiFeAl (molar Ni:Fe:Al = 1:1:1), producing concentrated H2 (83.1 vol%, 0.46 mol g(Ni+Fe)−1) and coke intermediate (232.1 wt%) from cracking. During the steam gasification stage, coke removal efficiency of 96% was obtained with a high syngas yield of 0.89 mol g(Ni+Fe)−1. With equimolar Ni/Fe, increasing Al/(Ni+Fe) ratio led to decreased catalyst activity due to enhanced metal–support interaction. Plausible reaction mechanisms were proposed to interpret the catalytic effects on tuning the morphologies, chemical structure and activity of the coke deposits. This work demonstrates the important role of Ni–Fe–Al catalysts on the production of H2 and syngas via chemical looping cracking–gasification process.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Huang, Jijiang
Veksha, Andrei
Foo, Thaddeus Jin Jun
Lisak, Grzegorz
format Article
author Huang, Jijiang
Veksha, Andrei
Foo, Thaddeus Jin Jun
Lisak, Grzegorz
author_sort Huang, Jijiang
title Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
title_short Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
title_full Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
title_fullStr Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
title_full_unstemmed Upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using Ni–Fe–Al redox catalysts
title_sort upgrading waste plastic derived pyrolysis gas via chemical looping cracking–gasification using ni–fe–al redox catalysts
publishDate 2022
url https://hdl.handle.net/10356/162172
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