University of Twente Student Theses


Hydrogen Recovery from UCG Gas: experimental data of hydrogen separation from UCG gas using a polymer membrane

Hagen, Jeffrey (2011) Hydrogen Recovery from UCG Gas: experimental data of hydrogen separation from UCG gas using a polymer membrane.

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Abstract:The internship was done for the combined master SET and ChE-PT and covered a period of 5 months. The assignment was provided by the University of the Western Cape (UWC) in Cape Town, South Africa. UWC cooperates in research projects with Eskom, South Africa’s electricity company. Eskom is developing Underground Coal Gasification (UCG) on a commercial scale. UCG is a process to gasify coal underground, this yields a product gas rich in H2, CO2, CO and CH4. This gas can be used in a gas turbine to produce electricity or can be used as a synthesis gas to produced chemicals. UCG has the potential to become a so called ‘clean coal technology’ because the emissions of SOx and NOx are reduced and CO2 can be captured before combustion. UCG has large economical potential because unminable coal seams (too thin or too deep) can be recovered by it. This is relevant for South Africa, because the country relies heavily on its large coal reserves for both electricity and transportation fuels. The assignment involved the design of a hydrogen plant to produce ultra pure hydrogen from the UCG product gas. A small membrane based process was designed that can be placed at the UCG demonstration plant. Various designs were made and both the capital investment and the production costs of them were compared. A polymer membrane module was tested at the current UCG pilot plant on the UCG product gas. For this an experimental setup was build and 3 weeks of testing was done. The acquired data was used in the design of the hydrogen plant. The experimental work was presented at the International Underground Coal Gasification conference held on 13-14 July 2011 in Johannesburg (South Africa). The extended abstract which was hand in for the conference can be found on blackboard.
Item Type:Internship Report (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Sustainable Energy Technology MSc (60443)
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