June 2016

Special Report: Process/Plant Optimization

Syngas from H2S and CO2: An alternative, pioneering synthesis route?

Hydrogen sulfide and carbon dioxide represent major concerns for the hydrocarbon industry. Both species are contaminants and, since their use as feedstock is minor, are considered troubling byproducts.

Manenti, G., Alfa Laval Olmi SpA; Molinari, L., KT-Kinetics Technology SpA; Manenti, F., Politecnico di Milano

Hydrogen sulfide (H2S) and carbon dioxide (CO2) represent major concerns for the hydrocarbon industry. Both species are contaminants and, since their use as feedstock is minor, are considered troubling byproducts. H2S, which mainly derives from oil and gas desulfurization, cannot be vented. Consequently, neutralization is mandatory. Practically every refinery is equipped with a Claus sulfur recovery unit (SRU). Flue gases rich in CO2 are vented, contributing to climate change; sequestration of CO2 is technically viable, but remote disposal still remains a questionable end. As a consequence, H2S and CO2 lead to significant capital, operating and financial costs, which are placing burdens on

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