H.sub.2 S abatement in geothermal steam during stacking operatio
H.sub.2 S removal from gas streams
H.sub.2 S removal process
H.sub.2 S removal process and composition
Halogen absorbtion using vegetable oils and surfactants
Hardness suppression in urea solutions
HCL adsorbent and method for making and using same
HCN and iron cyanide complex removal
Heat and mass transfer
Heat exchanger and pollutant removal system
Heat recirculating cooler for fluid stream pollutant removal
Heat recovery and pollution abatement device
Heat recovery device for a boiler
Heat recovery gas absorption process
Heat-treated active carbons for use in denitration,...
Heating of a storage trap
High activity titania supported metal oxide DeNOx catalysts
High activity water gas shift catalysts with no methane...
High capacity sulfur oxide-acceptors and their preparation
High surface area hydrated lime and method of removing SO.sub.2