The Resource Gas phase conversion of sugars to valuable C3 chemicals, by Wei Yan, (electronic resource)

Gas phase conversion of sugars to valuable C3 chemicals, by Wei Yan, (electronic resource)

Label
Gas phase conversion of sugars to valuable C3 chemicals
Title
Gas phase conversion of sugars to valuable C3 chemicals
Statement of responsibility
by Wei Yan
Creator
Contributor
Thesis advisor
Subject
Genre
Language
eng
Summary
The limited fossil oil reserve, fast-rising crude oil price and increasing environmental concerns make scientists and researchers give a serious look at biomass as feed stocks to produce chemicals and fuels. Five chapters in this dissertation focused on various methodologies to convert biomass into value added chemicals. The vapor pressure estimation and evaporation of sugars and sugar alcohols was first discussed. The purpose of this study is to overcome the drawbacks of liquid phase hydrogenolysis (low selectivities to desired products and high cost of catalyst recovery) and identify potential conditions for gas phase hydrogenolysis. A thermogravimetric analysis (TGA) method was used to estimate a boiling point of 362 0C for sorbitol with sorbitol's vapor pressure following a Clausius- Clapeyron model behavior. In addition, evaporation studies demonstrated sobitol evaporation and condensation on a practical level. The evaporation of sorbitol was experimentally validated with no decomposition at 0.1 bar and 294 0C and 2.5 % (mass fraction) in water. The evaporation of high-concentration sorbitol feed can be achieved by mixing with a high-temperature gas. Glucose evaporated with partial decomposition at temperatures as low as 220 0C. Gas phase catalytic hydrogenolysis was secondly demonstrated to be a means to produce valuable chemicals from sugars and sugar alcohols. Copper-chromite, palladium, and nickel beads catalysts were investigated for gas phase hydrogenolysis of sorbitol. Complete conversion was attained at reaction pressures of 0.3 to 1 bars. The highest selectivities favored acetol. The advantages over liquid phase hydrogeonolysis are mild reaction conditions (low temperatures and pressures), high selectivity to acetol and continuous operation in packed bed reactor. In addition, gas phase dehydration of glycerol was studied in the presence of solid acid catalyst. The reaction mechanism of producing acroelin from glycerol was proposed and validated. At mild condition of 2600C and 0.85 bar, up to 84% selectivity to acrolein can be achieved. Compared with other processes, this technology showed more advantages, e.g. higher selectivity, milder reaction conditions and long catalyst life. This process was considered as an alternative process for industry-scale production of acrolein
Cataloging source
MUU
http://library.link/vocab/creatorDate
1978-
http://library.link/vocab/creatorName
Yan, Wei
Degree
Ph. D.
Dissertation year
2008.
Granting institution
University of Missouri-Columbia
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorName
Suppes, Galen J.
http://library.link/vocab/subjectName
  • Biomass chemicals
  • Hydrogenolysis
  • Thermogravimetry
  • Acrolein
  • Glycerin
Target audience
specialized
Label
Gas phase conversion of sugars to valuable C3 chemicals, by Wei Yan, (electronic resource)
Instantiates
Publication
Note
  • The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file
  • Title from title screen of research.pdf file (viewed on July 31, 2009)
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
mixed
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
428975597
Dimensions
unknown
Form of item
electronic
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Specific material designation
remote
System control number
(OCoLC)428975597
System details
Mode of access: World Wide Web
Label
Gas phase conversion of sugars to valuable C3 chemicals, by Wei Yan, (electronic resource)
Publication
Note
  • The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file
  • Title from title screen of research.pdf file (viewed on July 31, 2009)
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
mixed
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
428975597
Dimensions
unknown
Form of item
electronic
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Specific material designation
remote
System control number
(OCoLC)428975597
System details
Mode of access: World Wide Web

Library Locations

  • Curtis Laws Wilson LibraryBorrow it
    400 West 14th Street, Rolla, MO, 65409, US
    37.955220 -91.772210
  • Missouri University of Science & Technology Library DepositoryBorrow it
    2908 Lemone Blvd, Columbia, MO, 65201, US
    38.919360 -92.291620
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