High-Capacity Amine-Imidazole Solvent Blends for CO2 Capture

被引：12

作者：

Evjen, Sigvart ^{[1
]}

Fiksdahl, Anne ^{[1
]}

Knuutila, Hanna K. ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Chem, Hgsk Ringen 5, N-7034 Trondheim, Norway

[2] Norwegian Univ Sci & Technol, Dept Chem Engn, Sem Saelands Vei 6, N-7034 Trondheim, Norway

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2019年 / 58卷 / 24期

关键词：

CARBON-DIOXIDE; AQUEOUS PIPERAZINE; ABSORPTION; DEGRADATION; VISCOSITY; MONOETHANOLAMINE; TERTIARY; KINETICS;

D O I：

10.1021/acs.iecr.9b01486

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The CO2 absorption performance of aqueous solvent blends containing four imidazoles (2-MeIm, 2-Et-4-MeIm, 2,4,5-MeIm and 1,2,4,5-MeIm) and four promoters (MEA, DEA, PZ, and MAPA) were investigated using a small-scale screening apparatus. Exceptionally high absorption capacity of 14 and 16 wt % was obtained for 2,4,5-MeIm/PZ and 2,4,5-MeIm/MAPA solutions, respectively. Cyclic capacities as high as 12 wt % were obtained for 3 M 2,4,5-MeIm + 1 M PZ solutions between 40 and 80 degrees C at 10 kPa CO2. The outstanding performance is the result of selective precipitation of 2,4,5-MeImH(+) bicarbonate, allowing the formation of a highly loaded slurry solution. 2,4,5-MeIm/diamine solutions are proposed as a novel type of absorption blend for CO2 capture.

引用

页码：10533 / 10539

页数：7

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