The Resource On the high density hydrogen films adsorbed in carbon nanospaces, by Elmar Dohnke

On the high density hydrogen films adsorbed in carbon nanospaces, by Elmar Dohnke

Label
On the high density hydrogen films adsorbed in carbon nanospaces
Title
On the high density hydrogen films adsorbed in carbon nanospaces
Statement of responsibility
by Elmar Dohnke
Creator
Contributor
Author
Thesis advisor
Subject
Genre
Language
eng
Summary
The commercialization of hydrogen-powered fuel cell cars, with their environmentally friendly emissions, provides an opportunity to replace current gasoline powered vehicles. The main drawback of hydrogen as a fuel is the low density at ambient temperatures. The gas needs to be compressed to high pressure or kept under cryogenic temperatures to achieve reasonably long driving ranges. These obstacles can be overcome if the tanks are filled with a porous material that adsorbs a high volume of hydrogen. Many materials are put forward for this purpose, such as metal organic frameworks (MOFs) and engineered carbon nanospaces (synthetic carbon). To get a better understanding of the materials performance, an attempt was made to analyze the properties of the adsorbed hydrogen film. High pressure hydrogen isotherms at cryogenic temperatures (77 K, 50 K) have been studied to estimate adsorbed film properties such as density and thickness. Furthermore, how isosteric heat of adsorption, surface chemistry, and pore size distribution affect the adsorbed film has been investigated. At supercritical temperatures and high pressures, a film density 20% higher than liquid hydrogen at 1 bar and 20 K was obtained. These densities are independent of the isosteric heat of adsorption or pore size distribution. The adsorbed film densities behave similarly for all carbon-based surfaces at 77 K. Additionally a new method was developed to estimate specific surface areas of gas storage materials from high pressure isotherms and tested against the BET theory. The new method does not require knowledge of the packing fraction or cross-sectional area of an adsorbed molecule in the film. In most cases the new method leads to surface areas comparable to those found using BET theory if cryogenic high pressure isotherms are used. A new manometric (Sieverts type) adsorption instrument was designed and test, capable of measuring sub- and supercritical hydrogen isotherms at high pressure
Cataloging source
MUU
http://library.link/vocab/creatorDate
1982-
http://library.link/vocab/creatorName
Dohnke, Elmar
Degree
PhD
Dissertation note
Thesis
Dissertation year
2015.
Government publication
government publication of a state province territory dependency etc
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/relatedWorkOrContributorDate
1946-
http://library.link/vocab/relatedWorkOrContributorName
Pfeifer, Peter
http://library.link/vocab/subjectName
  • Hydrogen as fuel
  • Hydrogen
  • Adsorption
  • Energy storage
Label
On the high density hydrogen films adsorbed in carbon nanospaces, by Elmar Dohnke
Instantiates
Publication
Note
  • "A Dissertation presented to the Faculty of the Graduate School at the University of Missouri-Columbia In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy."
  • Dissertation supervisor: Dr. Peter Pfeifer
  • Includes vita
Bibliography note
Includes bibliographical references (pages 97-99)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
958885742
Extent
1 online resource (xi, 100 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some color)
Specific material designation
remote
System control number
(OCoLC)958885742
Label
On the high density hydrogen films adsorbed in carbon nanospaces, by Elmar Dohnke
Publication
Note
  • "A Dissertation presented to the Faculty of the Graduate School at the University of Missouri-Columbia In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy."
  • Dissertation supervisor: Dr. Peter Pfeifer
  • Includes vita
Bibliography note
Includes bibliographical references (pages 97-99)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
958885742
Extent
1 online resource (xi, 100 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some color)
Specific material designation
remote
System control number
(OCoLC)958885742

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