METHOD AND APPARATUS FOR REGENERATING GAS USED IN CARBON DIOXIDE LASER GENERATOR

摘要

An improved method and apparatus for regenerationand reuse of He-N2-CO2 mixed gas for carbon dioxide gaslaser generator. The mixed gas after use is contactedwith a precious metal catalyst (for example, Pt-Al2O3) at atemperature of 200 - 300 °C to react CO and O2 so as toform CO2. Poisoning of the catalyst by NO x is suppressedat this relatively high temperature of reaction.Deterioration of the catalyst can be prevented to someextent by pretreating the catalyst prior to use, and theactivity of the catalyst, even if decreased, may berecovered by reactivation.