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Title: Catalytic igniters and their use to ignite lean hydrogen-air mixtures

Abstract

A catalytic igniter which can ignite a hydrogen-air mixture as lean as 5.5% hydrogen with induction times ranging from 20 s to 400 s, under conditions which may be present during a loss-of-liquid-coolant accident at a light water nuclear reactor comprises (a) a perforate catalytically active substrate, such as a platinum coated ceramic honeycomb or wire mesh screen, through which heated gases produced by oxidation of the mixture can freely flow and (b) a plurality of thin platinum wires mounted in a thermally conductive manner on the substrate and positioned thereon so as to be able to receive heat from the substrate and the heated gases while also in contact with unoxidized gases.

Inventors:
 [1];  [2];  [2]
  1. (Oakland, CA)
  2. (Livermore, CA)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
866578
Patent Number(s):
4741879
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
catalytic; igniters; ignite; lean; hydrogen-air; mixtures; igniter; mixture; hydrogen; induction; times; ranging; 20; 400; conditions; loss-of-liquid-coolant; accident; light; water; nuclear; reactor; comprises; perforate; catalytically; active; substrate; platinum; coated; ceramic; honeycomb; wire; mesh; screen; heated; gases; produced; oxidation; freely; flow; plurality; wires; mounted; thermally; conductive; manner; positioned; thereon; receive; heat; contact; unoxidized; mesh screen; active substrate; nuclear reactor; wire mesh; thermally conductive; catalytically active; air mixture; light water; water nuclear; reactor comprises; coated ceramic; ceramic honeycomb; gases produced; heated gas; air mixtures; catalytic igniter; coolant accident; /376/423/976/

Citation Formats

McLean, William J., Thorne, Lawrence R., and Volponi, Joanne V. Catalytic igniters and their use to ignite lean hydrogen-air mixtures. United States: N. p., 1988. Web.
McLean, William J., Thorne, Lawrence R., & Volponi, Joanne V. Catalytic igniters and their use to ignite lean hydrogen-air mixtures. United States.
McLean, William J., Thorne, Lawrence R., and Volponi, Joanne V. Fri . "Catalytic igniters and their use to ignite lean hydrogen-air mixtures". United States. https://www.osti.gov/servlets/purl/866578.
@article{osti_866578,
title = {Catalytic igniters and their use to ignite lean hydrogen-air mixtures},
author = {McLean, William J. and Thorne, Lawrence R. and Volponi, Joanne V.},
abstractNote = {A catalytic igniter which can ignite a hydrogen-air mixture as lean as 5.5% hydrogen with induction times ranging from 20 s to 400 s, under conditions which may be present during a loss-of-liquid-coolant accident at a light water nuclear reactor comprises (a) a perforate catalytically active substrate, such as a platinum coated ceramic honeycomb or wire mesh screen, through which heated gases produced by oxidation of the mixture can freely flow and (b) a plurality of thin platinum wires mounted in a thermally conductive manner on the substrate and positioned thereon so as to be able to receive heat from the substrate and the heated gases while also in contact with unoxidized gases.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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