High temperature electrochemical polishing of H{sub 2}S from coal gasification process streams: Quarterly progress report, July 1, 1996-September 30, 1996

PDF Version Also Available for Download.

Description

The Electrochemical Membrane Separator (E.M.S.), the focus of experimental work, purges a fuel gas contaminated with H{sub 2}S. This is done by reducing the most electro-active species in the gas stream. In this case, H{sub 2}S is reduced by the following: H{sub 2}S + 2e{sup -} {yields} H{sub 2} + S{sup 2-}. A membrane which contains sulfide ions in a molten salt electrolyte will act to transport the ions across to the anode. If the membrane is impermeable to H{sub 2} diffusion from the cathode side, an inert sweep gas can be used to carry the vaporous oxidized sulfur downstream ... continued below

Physical Description

39 p.

Creation Information

Winnick, J. March 1, 1997.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

  • Winnick, J. Georgia Inst. of Tech., Atlanta, GA (United States). School of Chemical Engineering

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The Electrochemical Membrane Separator (E.M.S.), the focus of experimental work, purges a fuel gas contaminated with H{sub 2}S. This is done by reducing the most electro-active species in the gas stream. In this case, H{sub 2}S is reduced by the following: H{sub 2}S + 2e{sup -} {yields} H{sub 2} + S{sup 2-}. A membrane which contains sulfide ions in a molten salt electrolyte will act to transport the ions across to the anode. If the membrane is impermeable to H{sub 2} diffusion from the cathode side, an inert sweep gas can be used to carry the vaporous oxidized sulfur downstream to be condensed. S{sup 2-}{yields} 1/2 S{sub 2} +2e{sup -}. Processes to remove H{sub 2}S typically rely on low-to-ambient temperature adsorption, followed by sorbent regeneration and Claus plant treatment for conversion of H{sub 2}S to a salable by-product, sulfur. Although effective, this type of removal is very process- intensive as well as energy-inefficient due to low temperature operation. Gasification streams generally range from 500{degrees}C - 1000{degrees}C, requiring cooling before and reheating after process gas sweetening. Although these technologies have proven capable of meeting H{sub 2}S levels required by molten carbonate fuel cell systems, there are several disadvantages inherent to these processes. Alternative high temperature methods are presently available, but process drawbacks including morphological changes in catalytic beds or inefficient molten salt sorbent processes negate savings incurred through energy efficient removal temperatures. An electrochemical membrane separation system for removing H{sub 2}S from coal gasification product streams is the subject of this investigation. The high operating temperature, flow-through design, and capability of selective H{sub 2}S removal and direct production of elemental sulfur offered by this process provide several advantages over existing and developmental H{sub 2}S removal technologies. 17 refs., 21 figs., 1 tab.

Physical Description

39 p.

Notes

OSTI as DE97051431

Source

  • Other Information: PBD: [1997]

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Other: DE97051431
  • Report No.: DOE/PC/94207--T9
  • Grant Number: FG22-94PC94207
  • DOI: 10.2172/469534 | External Link
  • Office of Scientific & Technical Information Report Number: 469534
  • Archival Resource Key: ark:/67531/metadc683512

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • March 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

Description Last Updated

  • Nov. 10, 2015, 9 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 2

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Winnick, J. High temperature electrochemical polishing of H{sub 2}S from coal gasification process streams: Quarterly progress report, July 1, 1996-September 30, 1996, report, March 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc683512/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.