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AssigneesMitsubishi Heavy Industries, Ltd., The Kansai Electric Power Co., Inc.
InventorsRyuji Yoshiyama, Masazumi Tanoura, Noriko Watari, Shuuji Fujii, Yukihiko Inoue, Mitsuru Sakano, Tarou Ichihara, Masaki Iijima, Tomio Mimura, Yasuyuki Yagi, Kouki Ogura
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An absorbent liquid according to the present invention is an absorbent liquid for absorbing CO2 or H2S or both from gas, in which the absorbent liquid includes an alkanolamine as a first compound component, and a second component including a nitrogen-containing compound having in a molecule thereof two members or more selected from a primary nitrogen, a secondary nitrogen, and a tertiary nitrogen or a nitrogen-containing compound having in a molecule thereof all of primary, secondary, and tertiary nitrogens. The absorbent liquid has an excellent absorption capacity performance and an excellent absorption reaction heat performance, as compared to an aqueous solution containing solely an alkanolamine and a nitrogen-containing compound in the same concentration in terms of wt %, and can recover CO2 or H2S or both from gas with smaller energy.
An absorbent liquid for absorbing CO2 or H2S or both from gas, the absorbent liquid comprising a mixture of a cyclic amine compound having one nitrogen in a ring, wherein the cyclic amine compound is hexamethyleneimine or aminomethylpiperidine and an alkanolamine, wherein the alkanolamine is monoethanolamine, ethylaminoethanol, triethanolamine, N-methyldiethanolamine, diisopropanolamine, diglycolamine, or a mixture thereof.
Dependencies are inferred from the claim text.