Evaluation of a Carbonic Anhydrase Mimic for Industrial Carbon Capture

被引：70

作者：

Floyd, William C., III

Baker, Sarah E. ^{[1
]}

Valdez, Carlos A. ^{[1
]}

Stolaroff, Joshuah K. ^{[2
]}

Bearinger, Jane P. ^{[1
]}

Satcher, Joe H., Jr. ^{[1
]}

Aines, Roger D. ^{[1
,2
]}

机构：

[1] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2013年 / 47卷 / 17期

关键词：

DIOXIDE CAPTURE; POSTCOMBUSTION CAPTURE; METAL-COMPLEXES; CO2; ABSORPTION; MONOETHANOLAMINE; CATALYSTS; MODEL; 1,4,7,10-TETRAAZACYCLODODECANE; STABILITY; HYDRATION;

D O I：

10.1021/es401336f

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Zinc(II) cyclen, a small molecule mimic of the enzyme carbonic anhydrase, was evaluated under rigorous conditions resembling those in an industrial carbon capture process: high pH (>12), nearly saturated salt concentrations (45% K2CO3) and elevated temperatures (100-130 degrees C). We found that the catalytic activity of zinc cyclen increased with increasing temperature and pH and was retained after exposure to a 45% w/w K2CO3 solution at 130 degrees C for 6 days. However, high bicarbonate concentrations markedly reduced the activity of the catalyst. Our results establish a benchmark level of stability and provide qualitative insights for the design of improved small-molecule carbon capture catalysts.

引用

页码：10049 / 10055

页数：7

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