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Environmental Chemistry Letters - Carbon neutral becomes one of the most important environmental goals due to the excessive emission of CO2. The reduction of CO2 into valuable chemicals or fuels is... 相似文献
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Hengrui Tao Jia Xing Gaofeng Pan Jonathan Pleim Limei Ran Shuxiao Wang Xing Chang Guojing Li Fei Chen Junhua Li 《Frontiers of Environmental Science & Engineering》2022,16(4):44
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Biwu Chu Kun Wang Hideto Takekawa Junhua Li Wei Zhou Jingkun Jiang Qinxing Ma Hong He Jiming Hao 《环境科学学报(英文版)》2014,(1)
Smog chamber experiments were conducted to investigate the hygroscopicity of particles generated from photooxidation of α-pinene/NOx with diferent sulfate seed aerosols or oxidation conditions. Hygroscopicity of particles was measured by a tandem diferential mobility analyzer(TDMA) in terms of hygroscopic growth factor(Gf), with a relative humidity of 85%. With sulfate seed aerosols present, Gf of the aerosols decreased very fast before notable secondary organic aerosols(SOA) formation was observed, indicating a heterogeneous process between inorganic seeds and organic products might take place as soon as oxidation begins, rather than only happening after gas-aerosol partition of organic products starts. The final SOA-coated sulfate particles had similar or lower Gf than seed-free SOA. The hygroscopicity of the final particles was not dependent on the thickness but on the hygroscopicity properties of the SOA, which were influenced by the initial sulfate seed particles. In the two designed aging processes, Gf of the particles increased more significantly with introduction of OH radical than with ozone. However, the hygroscopicity of SOA was very low even after a long time of aging, implying that either SOA aging in the chamber was very slow or the Gf of SOA did not change significantly in aging. Using an aerosol composition speciation monitor(ACSM) and matrix factorization(PMF) method, two factors for the components of SOA were identified, but the correlation between SOA hygroscopicity and the proportion of the more highly oxidized factor could be either positive or negative depending on the speciation of seed aerosols present. 相似文献
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This is the first case applying 2-haloethylamine to CO2 capture. The prospect of global warming and the urgent need to reduce atmospheric concentration of carbon dioxide has prompted
actions at many levels. The conventional capture of carbon dioxide is predominantly based on chemical absorption using ethanolamine.
Recent developments of carbon dioxide capture focus on new materials, such as ionic liquids, zeolites, membranes, carbonaceous
absorbents, and metal–organic frameworks. However, no unique solution exists currently to solve the problem of carbon dioxide
capture. In order to examine the efficiency of 2-chloroethylamine as an absorbent of CO2, we treated an aqueous solution of 2-chloroethylamine hydrochloride with CO2 in the presence of an alkali, e.g., NaOH, under ambient conditions. The absorption was complete within 30 min, seemingly
following first-order reaction kinetics. Furthermore, we succeeded in capturing CO2 from ambient air using 2-chloroethanolamine. The efficiency of 2-chloroethylamine as an absorbent of CO2 could be attributed to the production of stable 2-oxazolidinone, therefore, this reaction is favored thermodynamically. Compared
with previously reported absorbents, this novel system is capable of capturing CO2 with an extremely high efficiency of 1 mol per mol absorbent under ambient conditions, even from the atmosphere. This potential
method could be used to capture CO2 particularly from small, mobile, or low-concentration emission sources. 相似文献