Controlled Freeze Zone™ is an efficient single-step cryogenic distillation process for the removal of carbon dioxide, hydrogen sulfide and other impurities from natural gas. Rather than avoiding the freezing of CO2 at cryogenic temperatures, the solidification is allowed to take place, albeit in a very controlled fashion. The technology has shown the potential to more efficiently and cost-effectively separate carbon dioxide and other impurities from natural gas, and to discharge these contaminants as a high-pressure liquid stream ready for underground injection, either for enhanced oil recovery applications or for acid gas injection disposal.

Keywords:
corrosion inhibition, production chemistry, workplace hazard, oilfield chemistry, enhanced recovery, gas monetization, carbon dioxide, co 2, acid gas, freeze zone technology
Subjects:
Production Chemistry, Metallurgy and Biology, Natural Gas Conversion and Storage, Improved and Enhanced Recovery, Health, Liquified natural gas (LNG), Noise, chemicals, and other workplace hazards, Corrosion inhibition and management (including H2S and CO2)
Copyright 2012, Society of Petroleum Engineers
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