Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts

The present work reports on the effects of phosphoric acid-modified Zeolites-Y towards the ethylene formation from ethanol dehydration. The catalyst was impregnated with different H3PO4 loadings from 10 to 30wt%. All the catalysts were characterized using N2-physisorption, thermogravimetric analysis...

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Main Authors:	Jiah, Chee Soh, Soo, Ling Chong, Cheng, C. K.
Format:	Article
Language:	English English
Published:	Elsevier Ltd 2017
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/1/pagination_FUPROC_5223.pdf http://umpir.ump.edu.my/id/eprint/15845/7/fkksa-2017-ckcheng-Catalytic%20Ethylene%20Production1.pdf

id	ump-15845
recordtype	eprints
spelling	ump-158452017-08-09T07:56:08Z http://umpir.ump.edu.my/id/eprint/15845/ Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts Jiah, Chee Soh Soo, Ling Chong Cheng, C. K. TP Chemical technology The present work reports on the effects of phosphoric acid-modified Zeolites-Y towards the ethylene formation from ethanol dehydration. The catalyst was impregnated with different H3PO4 loadings from 10 to 30wt%. All the catalysts were characterized using N2-physisorption, thermogravimetric analysis, NH3-TPD, FTIR, SEM-EDX, X-ray diffraction and XPS techniques. The non-modified Zeolite-Y with Si/Al 80:1, H-Y (80) was found to exhibit excellent catalytic activity owing to the presence of weak acid sites that was able to protonate the hydroxyl group of ethanol. Although ethanol conversion dropped with phosphorus modified catalysts, it was found that the modified Zeolite-Y with 10wt% H3PO4 can achieve 99% selectivity to ethylene at 723 K and ethanol partial pressure of 16 kPa. Overall, ethanol conversion and ethylene selectivity decreased in the order of H-Y (80)> 10P/H-Y (80) > 20P/H-Y (80) > 30P/H-Y (80). The decrease in ethanol dehydration activity of phosphorus modified catalysts can be ascribed to the reduced BET specific surface area and pore volume due to the surface coverage by layers of H3PO4, consequently, hindered ethanol access to the active site However, the spent phosphorus modified Zeolite-Y catalyst consistently showed less carbon formation compared to the undoped catalyst. This could be due to the reduction in strong acid site and also hindrance of C2H5OH from travelling deep into the pore networks of H-Y (80), therefore reducing the residence time with a consequence of minimizing the carbon laydown. Elsevier Ltd 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/15845/1/pagination_FUPROC_5223.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/15845/7/fkksa-2017-ckcheng-Catalytic%20Ethylene%20Production1.pdf Jiah, Chee Soh and Soo, Ling Chong and Cheng, C. K. (2017) Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts. Fuel Processing Technology, 158. pp. 85-95. ISSN 0378-3820 http://dx.doi.org/10.1016/j.fuproc.2016.12.012 doi: 10.1016/j.fuproc.2016.12.012
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Jiah, Chee Soh Soo, Ling Chong Cheng, C. K. Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
description	The present work reports on the effects of phosphoric acid-modified Zeolites-Y towards the ethylene formation from ethanol dehydration. The catalyst was impregnated with different H3PO4 loadings from 10 to 30wt%. All the catalysts were characterized using N2-physisorption, thermogravimetric analysis, NH3-TPD, FTIR, SEM-EDX, X-ray diffraction and XPS techniques. The non-modified Zeolite-Y with Si/Al 80:1, H-Y (80) was found to exhibit excellent catalytic activity owing to the presence of weak acid sites that was able to protonate the hydroxyl group of ethanol. Although ethanol conversion dropped with phosphorus modified catalysts, it was found that the modified Zeolite-Y with 10wt% H3PO4 can achieve 99% selectivity to ethylene at 723 K and ethanol partial pressure of 16 kPa. Overall, ethanol conversion and ethylene selectivity decreased in the order of H-Y (80)> 10P/H-Y (80) > 20P/H-Y (80) > 30P/H-Y (80). The decrease in ethanol dehydration activity of phosphorus modified catalysts can be ascribed to the reduced BET specific surface area and pore volume due to the surface coverage by layers of H3PO4, consequently, hindered ethanol access to the active site However, the spent phosphorus modified Zeolite-Y catalyst consistently showed less carbon formation compared to the undoped catalyst. This could be due to the reduction in strong acid site and also hindrance of C2H5OH from travelling deep into the pore networks of H-Y (80), therefore reducing the residence time with a consequence of minimizing the carbon laydown.
format	Article
author	Jiah, Chee Soh Soo, Ling Chong Cheng, C. K.
author_facet	Jiah, Chee Soh Soo, Ling Chong Cheng, C. K.
author_sort	Jiah, Chee Soh
title	Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
title_short	Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
title_full	Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
title_fullStr	Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
title_full_unstemmed	Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts
title_sort	catalytic ethylene production from ethanol dehydration over non-modified and phosphoric acid modified zeolite h-y (80) catalysts
publisher	Elsevier Ltd
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/ http://umpir.ump.edu.my/id/eprint/15845/1/pagination_FUPROC_5223.pdf http://umpir.ump.edu.my/id/eprint/15845/7/fkksa-2017-ckcheng-Catalytic%20Ethylene%20Production1.pdf
first_indexed	2023-09-18T22:20:58Z
last_indexed	2023-09-18T22:20:58Z
_version_	1777415653197611008

Catalytic Ethylene Production from Ethanol Dehydration over Non-Modified and Phosphoric Acid Modified Zeolite H-Y (80) Catalysts

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