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The Resource Glycerin reformation in high temperature and pressure water, by Jason Wade Picou

Glycerin reformation in high temperature and pressure water, by Jason Wade Picou

Creator
Summary
"The noncatalytic reformation of glycerin in supercritical water was studied in a Haynes 282 tubular reactor. In order to determine which parameters were the most influential, a 23 experimental matrix was conducted, with temperatures of 500 and 700°C, water/glycerin molar ratios of 3:1 and 13:1, and residence times of 30 and 90 seconds, all at a pressure of 24 MPa. It was found that temperature had the largest effect on the two gasification parameters deemed most important, gasification percentage and hydrogen yield. Based on this, the effect of temperature was further investigated by looking at 50°C intervals from 500 to 800°C. From this it was determined that a temperature of 700 to 750°C was most conducive to glycerin reformation. The results were compared to equilibrium, as calculated by Gibbs free energy minimization. It was found that at temperatures from 750°C to 800°C; most of the results were at equilibrium. Based on this, kinetic models were developed for experiments not in equilibrium. The first model is a pseudo first order model of the gasification, which compares favorably with other studies. The second kinetic model takes into account the carbon containing gaseous species. Three reactions are used to model the gaseous products: Complete gasification of the glycerin into carbon monoxide and hydrogen, water gas shift of the resulting carbon monoxide, and a reaction in which glycerin and hydrogen combine to produce methane. Other reaction pathways were tested, and they either did not fit the data as well, or were thermodynamically impossible. The reactions are also capable of predicting hydrogen production for most conditions"--Abstract, leaf iii
Language
eng
Work
Publication
Extent
xii, 233 leaves
Note
Vita
Instance
Label
Glycerin reformation in high temperature and pressure water
Title
Glycerin reformation in high temperature and pressure water
Statement of responsibility
by Jason Wade Picou
Creator
Subject
Language
eng
Summary
"The noncatalytic reformation of glycerin in supercritical water was studied in a Haynes 282 tubular reactor. In order to determine which parameters were the most influential, a 23 experimental matrix was conducted, with temperatures of 500 and 700°C, water/glycerin molar ratios of 3:1 and 13:1, and residence times of 30 and 90 seconds, all at a pressure of 24 MPa. It was found that temperature had the largest effect on the two gasification parameters deemed most important, gasification percentage and hydrogen yield. Based on this, the effect of temperature was further investigated by looking at 50°C intervals from 500 to 800°C. From this it was determined that a temperature of 700 to 750°C was most conducive to glycerin reformation. The results were compared to equilibrium, as calculated by Gibbs free energy minimization. It was found that at temperatures from 750°C to 800°C; most of the results were at equilibrium. Based on this, kinetic models were developed for experiments not in equilibrium. The first model is a pseudo first order model of the gasification, which compares favorably with other studies. The second kinetic model takes into account the carbon containing gaseous species. Three reactions are used to model the gaseous products: Complete gasification of the glycerin into carbon monoxide and hydrogen, water gas shift of the resulting carbon monoxide, and a reaction in which glycerin and hydrogen combine to produce methane. Other reaction pathways were tested, and they either did not fit the data as well, or were thermodynamically impossible. The reactions are also capable of predicting hydrogen production for most conditions"--Abstract, leaf iii
Related
Cataloging source
UMR
http://library.link/vocab/creatorName
Picou, Jason W
Degree
Ph. D.
Dissertation year
2012.
Granting institution
Missouri University of Science and Technology
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
theses
http://library.link/vocab/subjectName
  • Biomass gasification
  • Glycerin
  • Synthesis gas
  • Supercritical fluids
  • Kinetic theory of liquids
Label
Glycerin reformation in high temperature and pressure water, by Jason Wade Picou
Instantiates
Publication
Note
Vita
Bibliography note
Includes bibliographical references (leaves 203-232)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
815749334
Dimensions
28 cm
Extent
xii, 233 leaves
Media category
unmediated
Media MARC source
rdamedia
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)815749334
Label
Glycerin reformation in high temperature and pressure water, by Jason Wade Picou
Publication
Note
Vita
Bibliography note
Includes bibliographical references (leaves 203-232)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
815749334
Dimensions
28 cm
Extent
xii, 233 leaves
Media category
unmediated
Media MARC source
rdamedia
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)815749334

Subject

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Library Locations

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      400 West 14th Street, Rolla, MO, 65409, US
      37.955220 -91.772210

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