Cover Image

Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst

Catalytic steam reforming is a promising approach to address tar formation and improve hydrogen (H2) production from biomass gasification. In this research, multi-compound tar model (phenol, toluene, naphthalene, and pyrene) was steam reformed for H2 production over various types of 10 wt.% dolomite...

Full description

Saved in:
Bibliographic Details
Main Author: Tan, Ru Shien
Format: Thesis
Language:English
Published: 2019
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/92862/1/TanRuShienMSChE2019.pdf
http://eprints.utm.my/id/eprint/92862/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131863
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.92862
record_format eprints
spelling my.utm.928622021-10-28T10:25:37Z http://eprints.utm.my/id/eprint/92862/ Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst Tan, Ru Shien TP Chemical technology Catalytic steam reforming is a promising approach to address tar formation and improve hydrogen (H2) production from biomass gasification. In this research, multi-compound tar model (phenol, toluene, naphthalene, and pyrene) was steam reformed for H2 production over various types of 10 wt.% dolomite promoted 10 wt.% nickel based catalysts supported on alumina, lanthana, ceria, and zirconia. The research aims to synthesize nickel-dolomite catalyst for steam reforming of gasified biomass tar for optimum H2 production. The catalysts were characterized by thermogravimetric analysis, temperature programmed reduction, temperature programmed desorption, nitrogen physisorption, and X-ray diffraction. The results showed that the addition of dolomite promoter to the catalysts strengthened the metal-support interaction and basicity of the catalyst. Steam reforming for catalyst screening was carried out at 700 oC with steam to carbon (S/C) molar ratio of 1 and gas hourly space velocity (GHSV) of 20,453 mL/h·gcat. The Ni/dolomite/La2O3 (NiDLa) catalyst displayed mesoporous structure, high reducibility, and basicity, which lead to superior carbon conversion to gas (77.66 mol%) and H2 yield (66.20 mol%). In addition, spent NiDLa exhibited the lowest amount of filamentous coke (110 mg/gcat) formation after 5 hours of reaction compared to the other catalysts investigated. Findings on effect of reaction condition revealed that higher temperature (> 750 oC), S/C ratio that is close to the stoichiometric value (1), and moderate GHSV (12,000 – 18,000 h-1) can improve carbon conversion to gas and H2 yield. The optimum conditions were found to be 775 oC of temperature, 1.02 of S/C molar ratio, and 14,648 h-1 of GHSV which resulted in 99.94 mol% of carbon conversion to gas and 82.84 mol% of H2 yield. This finding is close to the predicted 98.96 mol% of carbon conversion to gas and 82.00 mol% of H2 yield by response surface method. 2019 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/92862/1/TanRuShienMSChE2019.pdf Tan, Ru Shien (2019) Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst. Masters thesis, Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131863
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Tan, Ru Shien
Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
description Catalytic steam reforming is a promising approach to address tar formation and improve hydrogen (H2) production from biomass gasification. In this research, multi-compound tar model (phenol, toluene, naphthalene, and pyrene) was steam reformed for H2 production over various types of 10 wt.% dolomite promoted 10 wt.% nickel based catalysts supported on alumina, lanthana, ceria, and zirconia. The research aims to synthesize nickel-dolomite catalyst for steam reforming of gasified biomass tar for optimum H2 production. The catalysts were characterized by thermogravimetric analysis, temperature programmed reduction, temperature programmed desorption, nitrogen physisorption, and X-ray diffraction. The results showed that the addition of dolomite promoter to the catalysts strengthened the metal-support interaction and basicity of the catalyst. Steam reforming for catalyst screening was carried out at 700 oC with steam to carbon (S/C) molar ratio of 1 and gas hourly space velocity (GHSV) of 20,453 mL/h·gcat. The Ni/dolomite/La2O3 (NiDLa) catalyst displayed mesoporous structure, high reducibility, and basicity, which lead to superior carbon conversion to gas (77.66 mol%) and H2 yield (66.20 mol%). In addition, spent NiDLa exhibited the lowest amount of filamentous coke (110 mg/gcat) formation after 5 hours of reaction compared to the other catalysts investigated. Findings on effect of reaction condition revealed that higher temperature (> 750 oC), S/C ratio that is close to the stoichiometric value (1), and moderate GHSV (12,000 – 18,000 h-1) can improve carbon conversion to gas and H2 yield. The optimum conditions were found to be 775 oC of temperature, 1.02 of S/C molar ratio, and 14,648 h-1 of GHSV which resulted in 99.94 mol% of carbon conversion to gas and 82.84 mol% of H2 yield. This finding is close to the predicted 98.96 mol% of carbon conversion to gas and 82.00 mol% of H2 yield by response surface method.
format Thesis
author Tan, Ru Shien
author_facet Tan, Ru Shien
author_sort Tan, Ru Shien
title Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
title_short Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
title_full Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
title_fullStr Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
title_full_unstemmed Steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
title_sort steam reforming of gasified biomass tar for hydrogen production over nickel-dolomite based catalyst
publishDate 2019
url http://eprints.utm.my/id/eprint/92862/1/TanRuShienMSChE2019.pdf
http://eprints.utm.my/id/eprint/92862/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131863
_version_ 1715189700995579904
score 13.211869

Similar Items