Regenerative aqueous carbonate

Regenerative Aqueous Carbonate Process for Utility and Industrial Sulfur Dioxide Removal... 

Besides chemical catalytic reduction of carbon dioxide with hydrogen, which is already possible in the laboratory, we are exploring a new approach to recycling carbon dioxide into methyl alcohol or related oxygenates via aqueous eleetrocatalytic reduction using what can be called a regenerative fuel cell system. The direct methanol fuel cell... 

Hydrogen sulfide, H2S, is removed by a variety of processes, of which one is a regenerative solution process using aqueous solutions of sodium hydroxide, NaOH, calcium hydroxide, Ca(OH)2, sodium phosphate, Na PO, and sodium carbonate, Na2C02. 

Sodium hydroxide, m aqueous solution with sodium carbonate, is occasionally used to remove Ae last traces of carbon dioxide from hydrogen, or other gases, where Ae bulk of the carbon Aoxide has been removed by a more economical, but less efficient regenerative process. Caustic scrubbing is also used to remove CO2 from small volumes of air where CC>2-ffee air is required. 

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