Institute of Gas Technology

Harley A Borders

Gerald L Anderson

F Otis Berry

Maria R Aquino

A process for substantial removal of nitrogen and sulfur compounds from gas streams, particularly fuel gas mixtures produced from sulfur and nitrogen containing coal or other carbonaceous fuels, by contacting the gas stream with solid zinc oxide at elevated temperatures in a reaction zone. The process provides a continuous method of removal of ammonia and hydrogen sulfide by contacting the gas stream with zinc oxide solids and regenerating the sulfided zinc in a fluidized bed regeneration zone by contact with oxygen containing gas at elevated temperatures. The process provides simultaneous removal of sulfur and nitrogen components of a fuel gas stream without requiring a decrease in the temperature of the fuel gas stream.

Purification of fuel gases

A process is disclosed for desulfurization of gas streams by which reduced sulfur compound, such as H.sub.2 S, is reacted with solid sulfur removal metal oxide compound which is an oxide of chromium, combination of zinc and chromium, combination of zinc and aluminum and mixtures thereof at about 400.degree. to about 1600.degree. F. producing sulfided sulfur removal compound followed by regeneration of the sulfided compound by contact with oxygen containing gas at temperatures about 1400.degree. to about 2400.degree. F. to regenerate the sulfur removal metal oxide compound with at least 10 weight percent of the sulfur removed being in the form of elemental sulfur. The process does not consume valuable fuels, such as coke or fuel gases, and provides an environmentally acceptable off-gas with reduced amounts of SO.sub.x.

Growing community of inventors

Berwyn, IL, United States of America

Harley A Borders