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Title: Performance of a palladium membrane reactor using a Ni catalyst for fusion fuel impurities processing

Abstract

The palladium membrane reactor (PMR) provides a means to recover hydrogen isotopes from impurities expected to be present in fusion reactor exhaust. This recovery is based on reactions such as water gas shift and steam reforming for which conversion is equilibrium limited. By including a selectively permeable membrane such as Pd/Ag in the catalyst bed, hydrogen isotopes can be removed from the reacting environment, thus promoting the reaction to complete conversion. Such a device has been built and operated at the Tritium Systems Test Assembly (TSTA) at Los Alamos National Laboratory (LANL). For the reactions listed above, earlier study with this unit has shown that hydrogen single-pass recoveries approaching 100% can be achieved. It was also determined that a nickel catalyst is a feasible choice for use with a PMR appropriate for fusion fuel impurities processing. The purpose of this study is to systematically assess the performance of the PMR using a nickel catalyst. Reactions which will be studied include the water gas shift reaction, steam reforming and methane cracking. Extended operation will be performed to detect performance degradation if it exists. The use of methane in these tests may lead to the formation of coke on the catalyst. Methodsmore » of removing the coke such as treatment with carbon dioxide or diluted oxygen will be examined.« less

Authors:
 [1];  [2]
  1. Los Alamos National Lab., NM (United States)
  2. Japan Atomic Energy Research Inst., Ibaraki-ken (Japan)
Publication Date:
OSTI Identifier:
196965
Report Number(s):
CONF-940664-
TRN: 95:005767-0134
Resource Type:
Conference
Resource Relation:
Conference: ISFNT-3: international symposium on fusion nuclear technology, Los Angeles, CA (United States), 27 Jun - 1 Jul 1994; Other Information: PBD: 1994; Related Information: Is Part Of Third international symposium on fusion nuclear technology; PB: 362 p.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; HYDROGEN ISOTOPES; MEMBRANE TRANSPORT; SEPARATION PROCESSES; PALLADIUM ALLOYS; SILVER ALLOYS; MEMBRANES; NICKEL; CATALYSIS; TRITIUM SYSTEMS TEST ASSEMBLY; STEAM REFORMER PROCESSES; WATER GAS PROCESSES

Citation Formats

Willm, R S, and Okuno, K. Performance of a palladium membrane reactor using a Ni catalyst for fusion fuel impurities processing. United States: N. p., 1994. Web.
Willm, R S, & Okuno, K. Performance of a palladium membrane reactor using a Ni catalyst for fusion fuel impurities processing. United States.
Willm, R S, and Okuno, K. 1994. "Performance of a palladium membrane reactor using a Ni catalyst for fusion fuel impurities processing". United States.
@article{osti_196965,
title = {Performance of a palladium membrane reactor using a Ni catalyst for fusion fuel impurities processing},
author = {Willm, R S and Okuno, K},
abstractNote = {The palladium membrane reactor (PMR) provides a means to recover hydrogen isotopes from impurities expected to be present in fusion reactor exhaust. This recovery is based on reactions such as water gas shift and steam reforming for which conversion is equilibrium limited. By including a selectively permeable membrane such as Pd/Ag in the catalyst bed, hydrogen isotopes can be removed from the reacting environment, thus promoting the reaction to complete conversion. Such a device has been built and operated at the Tritium Systems Test Assembly (TSTA) at Los Alamos National Laboratory (LANL). For the reactions listed above, earlier study with this unit has shown that hydrogen single-pass recoveries approaching 100% can be achieved. It was also determined that a nickel catalyst is a feasible choice for use with a PMR appropriate for fusion fuel impurities processing. The purpose of this study is to systematically assess the performance of the PMR using a nickel catalyst. Reactions which will be studied include the water gas shift reaction, steam reforming and methane cracking. Extended operation will be performed to detect performance degradation if it exists. The use of methane in these tests may lead to the formation of coke on the catalyst. Methods of removing the coke such as treatment with carbon dioxide or diluted oxygen will be examined.},
doi = {},
url = {https://www.osti.gov/biblio/196965}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}

Conference:
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