Catalytic Flash Pyrolysis of Biomass Using Different Types of Zeolite and Online Vapor Fractionation

Handle URI:
http://hdl.handle.net/10754/606962
Title:
Catalytic Flash Pyrolysis of Biomass Using Different Types of Zeolite and Online Vapor Fractionation
Authors:
Imran, Ali; Bramer, Eddy; Seshan, Kulathuiyer; Brem, Gerrit
Abstract:
Bio-oil produced from conventional flash pyrolysis has poor quality and requires expensive upgrading before it can be used as a transportation fuel. In this work, a high quality bio-oil has been produced using a novel approach where flash pyrolysis, catalysis and fractionation of pyrolysis vapors using two stage condensation are combined in a single process unit. A bench scale unit of 1 kg/h feedstock capacity is used for catalytic pyrolysis in an entrained down-flow reactor system equipped with two-staged condensation of the pyrolysis vapor. Zeolite-based catalysts are investigated to study the effect of varying acidities of faujasite Y zeolites, zeolite structures (ZSM5), different catalyst to biomass ratios and different catalytic pyrolysis temperatures. Low catalyst/biomass ratios did not show any significant improvements in the bio-oil quality, while high catalyst/biomass ratios showed an effective deoxygenation of the bio-oil. The application of zeolites decreased the organic liquid yield due to the increased production of non-condensables, primarily hydrocarbons. The catalytically produced bio-oil was less viscous and zeolites were effective at cracking heavy molecular weight compounds in the bio-oil. Acidic zeolites, H-Y and H-ZSM5, increased the desirable chemical compounds in the bio-oil such as phenols, furans and hydrocarbon, and reduced the undesired compounds such as acids. On the other hand reducing the acidity of zeolites reduced some of the undesired compounds in the bio-oil such as ketones and aldehydes. The performance of H-Y was superior to that of the rest of zeolites studied: bio-oil of high chemical and calorific value was produced with a high organic liquid yield and low oxygen content. H-ZSM5 was a close competitor to H-Y in performance but with a lower yield of bio-oil. Online fractionation of catalytic pyrolysis vapors was employed by controlling the condenser temperature and proved to be a successful process parameter to tailor the desired bio-oil properties. A high calorific value bio-oil having up to 90% organics was produced using two staged condensation of catalytic pyrolysis vapor. Zeolite-based acidic catalysts can be used for selective deoxygenation, and the catalytic bio-oil quality can be further improved with staged vapor condensation.
KAUST Department:
Water Desalination & Reuse Research Cntr
Citation:
Catalytic Flash Pyrolysis of Biomass Using Different Types of Zeolite and Online Vapor Fractionation 2016, 9 (3):187 Energies
Publisher:
MDPI AG
Journal:
Energies
Issue Date:
11-Mar-2016
DOI:
10.3390/en9030187
Type:
Article
ISSN:
1996-1073
Sponsors:
This work was funded by the Dutch Technology Foundation STW and carried out at the University of Twente, The Netherlands.
Additional Links:
http://www.mdpi.com/1996-1073/9/3/187
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorImran, Alien
dc.contributor.authorBramer, Eddyen
dc.contributor.authorSeshan, Kulathuiyeren
dc.contributor.authorBrem, Gerriten
dc.date.accessioned2016-04-25T13:58:29Zen
dc.date.available2016-04-25T13:58:29Zen
dc.date.issued2016-03-11en
dc.identifier.citationCatalytic Flash Pyrolysis of Biomass Using Different Types of Zeolite and Online Vapor Fractionation 2016, 9 (3):187 Energiesen
dc.identifier.issn1996-1073en
dc.identifier.doi10.3390/en9030187en
dc.identifier.urihttp://hdl.handle.net/10754/606962en
dc.description.abstractBio-oil produced from conventional flash pyrolysis has poor quality and requires expensive upgrading before it can be used as a transportation fuel. In this work, a high quality bio-oil has been produced using a novel approach where flash pyrolysis, catalysis and fractionation of pyrolysis vapors using two stage condensation are combined in a single process unit. A bench scale unit of 1 kg/h feedstock capacity is used for catalytic pyrolysis in an entrained down-flow reactor system equipped with two-staged condensation of the pyrolysis vapor. Zeolite-based catalysts are investigated to study the effect of varying acidities of faujasite Y zeolites, zeolite structures (ZSM5), different catalyst to biomass ratios and different catalytic pyrolysis temperatures. Low catalyst/biomass ratios did not show any significant improvements in the bio-oil quality, while high catalyst/biomass ratios showed an effective deoxygenation of the bio-oil. The application of zeolites decreased the organic liquid yield due to the increased production of non-condensables, primarily hydrocarbons. The catalytically produced bio-oil was less viscous and zeolites were effective at cracking heavy molecular weight compounds in the bio-oil. Acidic zeolites, H-Y and H-ZSM5, increased the desirable chemical compounds in the bio-oil such as phenols, furans and hydrocarbon, and reduced the undesired compounds such as acids. On the other hand reducing the acidity of zeolites reduced some of the undesired compounds in the bio-oil such as ketones and aldehydes. The performance of H-Y was superior to that of the rest of zeolites studied: bio-oil of high chemical and calorific value was produced with a high organic liquid yield and low oxygen content. H-ZSM5 was a close competitor to H-Y in performance but with a lower yield of bio-oil. Online fractionation of catalytic pyrolysis vapors was employed by controlling the condenser temperature and proved to be a successful process parameter to tailor the desired bio-oil properties. A high calorific value bio-oil having up to 90% organics was produced using two staged condensation of catalytic pyrolysis vapor. Zeolite-based acidic catalysts can be used for selective deoxygenation, and the catalytic bio-oil quality can be further improved with staged vapor condensation.en
dc.description.sponsorshipThis work was funded by the Dutch Technology Foundation STW and carried out at the University of Twente, The Netherlands.en
dc.language.isoenen
dc.publisherMDPI AGen
dc.relation.urlhttp://www.mdpi.com/1996-1073/9/3/187en
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/en
dc.subjectcatalytic pyrolysisen
dc.subjectzeolitesen
dc.subjectbiomassen
dc.subjectfractionationen
dc.titleCatalytic Flash Pyrolysis of Biomass Using Different Types of Zeolite and Online Vapor Fractionationen
dc.typeArticleen
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalEnergiesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionLaboratory of Thermal Engineering, Faculty of Engineering, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlandsen
dc.contributor.institutionCatalytic Processes and Materials, Faculty of Science & Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlandsen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorImran, Alien
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