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Catalytic fast pyrolysis of softwood under N2 and H2 atmosphere
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology. (Energy and furnace technology)
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Bio-oil generated from biomass is becoming one of the most promising alternatives as potential energy sources to replace fossil fuels in the transportation sector. Fast pyrolysis of biomass is one of the most economically feasible ways to produce bio-oil according to recent research on thermochemical conversion of biomass. Upgrading of oils derived from to hydrocarbon fuels requires oxygen removal and molecular weight reduction.  Catalytic cracking and hydrotreating are two efficient processes to upgrade bio-oil. Hydrotreating requires that hydrogen is added in the process to increase the H/C ratio of the product. Normally, catalytic fast pyrolysis and hydrotreating are two separated processes.

In order to increase the energy efficiency of the process, exploring the fast pyrolysis of biomass with in-situ catalyst under the hydrogen atmosphere, i.e. catalytic hydropyrolysis shall be very interesting, and this is the objective of this work.

In this work, biomass pyrolysis experiments using softwood have been performed in hydrogen and nitrogen atmospheres with/without catalyst. It was found that in the case of the H2 atmosphere, a higher yield on oil phase and a reduced water production is found. More oxygen was removed as CO and CO2. The catalytic fast pyrolysis (CFP) under H2 atmosphere also produce relatively more PAH (polymer aromatic hydrocarbon) and less MAH (monomer aromatic hydrocarbon) than under N2 atmosphere.

 

Place, publisher, year, edition, pages
2017. , 31 p.
Keyword [en]
pyrolysis; CFP; bioenergy
Keyword [zh]
生物质; 生物能源;
National Category
Materials Engineering Bioenergy
Identifiers
URN: urn:nbn:se:kth:diva-216995OAI: oai:DiVA.org:kth-216995DiVA: diva2:1152936
Subject / course
Materials and Process Design
Educational program
Master of Science - Engineering Materials Science
Presentation
2017-10-17, Conference room, BRINELLVÄGEN 23, 10044 STOCKHOLM, Stockholm, 15:00 (English)
Supervisors
Examiners
Available from: 2017-11-03 Created: 2017-10-26 Last updated: 2017-11-03Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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Output format
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