Partial deoxygenation of biomass derived pyrolysis liquids

Biomass pyrolysis liquids (also known as bio-oil), are derived from renewable lignocellulosic biomass residues by fast pyrolysis process. These second-generation oxygenated hydrocarbon resources have the potential to partially substitute for petroleum-derived feedstocks and thus enhance the economic...

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Main Authors: Gupta Murlidhar, Monnier Jacques, Turriff Eric, Boyd Mark
Format: Article
Language:English
Published: EDP Sciences 2018-01-01
Series:E3S Web of Conferences
Online Access:https://doi.org/10.1051/e3sconf/20186100018
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spelling doaj-e3e7c0e21e694e2088ef51aad14eda712021-02-02T00:26:28ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01610001810.1051/e3sconf/20186100018e3sconf_icren2018_00018Partial deoxygenation of biomass derived pyrolysis liquidsGupta MurlidharMonnier JacquesTurriff EricBoyd MarkBiomass pyrolysis liquids (also known as bio-oil), are derived from renewable lignocellulosic biomass residues by fast pyrolysis process. These second-generation oxygenated hydrocarbon resources have the potential to partially substitute for petroleum-derived feedstocks and thus enhance the economic and environmental sustainability of our natural resources. However, in contrast to petroleum fuels, biomass-derived pyrolysis liquids contain a large amount of oxygen, usually 40-50% wt% (wet basis). This undesirable high oxygen content in pyrolysis liquids is considered as the primary reason for its high polarity, high acidity, lower stability, lower energy density and very low miscibility with conventional crude refining feedstocks. There are two major pathways for upgrading the pyrolysis liquids. While hydrodeoxygenation route is one of the most explored options, it requires production and supply of large amounts of expensive hydrogen at high pressures, mandating large and centralized upgrading plants, and thus large capital investment. In this paper, we discuss an alternative method of pyrolysis liquid upgrading, using cheap and affordable hydrogen donor additives and catalysts to promote partial deoxygenation at near atmospheric pressure. This approach is preferably to be used as a pre-treatment and stabilizing method for pyrolysis liquids in the close vicinity of remote biomass pyrolysis plants. The pre-treated oil, then can be shipped for further hydrocracking process in a centralized co-processing facility. Preliminary results from the initial proof of concept experiments involving a 200 g/h gas-phase continuous fast catalytic cracking system with continuous coke removal to enhance deoxygenation performance are presented. These results indicate positive impact of catalyst bed on quality and yield of the upgraded bio-oil product in terms of pH, viscosity, degree of deoxygenation, oil yield and concentration of hydrogen in the off gases.https://doi.org/10.1051/e3sconf/20186100018
collection DOAJ
language English
format Article
sources DOAJ
author Gupta Murlidhar
Monnier Jacques
Turriff Eric
Boyd Mark
spellingShingle Gupta Murlidhar
Monnier Jacques
Turriff Eric
Boyd Mark
Partial deoxygenation of biomass derived pyrolysis liquids
E3S Web of Conferences
author_facet Gupta Murlidhar
Monnier Jacques
Turriff Eric
Boyd Mark
author_sort Gupta Murlidhar
title Partial deoxygenation of biomass derived pyrolysis liquids
title_short Partial deoxygenation of biomass derived pyrolysis liquids
title_full Partial deoxygenation of biomass derived pyrolysis liquids
title_fullStr Partial deoxygenation of biomass derived pyrolysis liquids
title_full_unstemmed Partial deoxygenation of biomass derived pyrolysis liquids
title_sort partial deoxygenation of biomass derived pyrolysis liquids
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2018-01-01
description Biomass pyrolysis liquids (also known as bio-oil), are derived from renewable lignocellulosic biomass residues by fast pyrolysis process. These second-generation oxygenated hydrocarbon resources have the potential to partially substitute for petroleum-derived feedstocks and thus enhance the economic and environmental sustainability of our natural resources. However, in contrast to petroleum fuels, biomass-derived pyrolysis liquids contain a large amount of oxygen, usually 40-50% wt% (wet basis). This undesirable high oxygen content in pyrolysis liquids is considered as the primary reason for its high polarity, high acidity, lower stability, lower energy density and very low miscibility with conventional crude refining feedstocks. There are two major pathways for upgrading the pyrolysis liquids. While hydrodeoxygenation route is one of the most explored options, it requires production and supply of large amounts of expensive hydrogen at high pressures, mandating large and centralized upgrading plants, and thus large capital investment. In this paper, we discuss an alternative method of pyrolysis liquid upgrading, using cheap and affordable hydrogen donor additives and catalysts to promote partial deoxygenation at near atmospheric pressure. This approach is preferably to be used as a pre-treatment and stabilizing method for pyrolysis liquids in the close vicinity of remote biomass pyrolysis plants. The pre-treated oil, then can be shipped for further hydrocracking process in a centralized co-processing facility. Preliminary results from the initial proof of concept experiments involving a 200 g/h gas-phase continuous fast catalytic cracking system with continuous coke removal to enhance deoxygenation performance are presented. These results indicate positive impact of catalyst bed on quality and yield of the upgraded bio-oil product in terms of pH, viscosity, degree of deoxygenation, oil yield and concentration of hydrogen in the off gases.
url https://doi.org/10.1051/e3sconf/20186100018
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AT boydmark partialdeoxygenationofbiomassderivedpyrolysisliquids
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