leito protetor contendo compostos de chumbo à montante de um leito catalisador contendo cobre para prevenir a sua contaminação por contaminantes cloro e enxofre.

摘要

A combination comprising a bed of a particulate copper-containing catalyst and, a guard bed of a particulate composition containing a) lead and/or at least one lead compound that reacts with hydrogen chloride and b) a support therefor. The lead compound is preferably lead nitrate. The combination is of particular utility for the low temperature shift reaction wherein carbon monoxide is reacted with steam to produce hydrogen and carbon dioxide.