Chemical activation gases produced during

Precious metals can be reduced by reaction with hydrogen even at room temperature. It is therefore possible to reduce supported precious metal catalysts after suspension in the liquid where the catalytic reaction is to proceed, merely by passing a flow of hydrogen through the liquid. It must, however, be considered that the water produced during the reduction of the precious metal particles must be removed from the surface of the catalyst before the reactants can approach the catalytically active sites. With liquids that are not miscible with water, it might take some time before the water is released from the metal surface. That precious metal catalysts need not be reduced at elevated temperatures in a gas flow is one reason these expensive metals are attractive for the fine-chemical industry. As... 

During our earlier work, it was recognized that adsorption capacity of carbons was dependent on the type of activated carbon used. In order to understand the influence of the chemical and physical characteristics of carbons on NO adsorption and to possibly optimize a process for the selective removal of NO, from combustion flue gas, it was considered important to understand the relationship between adsorption capacity and carbon characteristics, especially the nature of the active binding sites, lliis work used thermogravimetiy/ mass spectrometry (TG/MS) to determine adsorptive capacity of commercially available activated carbons produced firom co, coconut, and petroleum pitch. The relationship between their chemical and physical characteristics relative to NO, adsorptive capacities was explored. 

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