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Chinese Journal of Chemical Engineering 2022年第6期35卷 11-20页

作者： Vladimir S.Derevschikov Janna V.Veselovskaya Anton S.Shalygin Dmitry A.Yatsenko Andrey Z.Sheshkovas Oleg N.Martyanov Boreskov Institute of Catalysis SB RAS Akademika Lavrentieva Av.5630090 NovosibirskRussia Novosibirsk State University Pirogova Str.1630090 NovosibirskRussia

potassium carbonate-based sorbents are prospective materials for direct air capture(DAC).In the present study,we examined and revealed the influence of the temperature swing adsorption(TSA)cycle conditions on the CO_(2) sorption properties of a novel aerogel-based K_(2)CO_(3)/ZrO_(2) sorbent in a DAC *** was shown that the humidity and temperature drastically affect the sorption dynamic and sorption capacity of the *** a temperature at the sorption stage was 29℃ and a water vapor pressure P_(H2O) in the feed air was 5.2 mbar(1 bar=105 Pa),the composite material demonstrated a stable CO_(2) sorption capacity of 3.4%(mass).An increase in sorption temperature leads to a continuous decrease in the CO_(2) absorption capacity reaching a value of 0.7%(mass)at T=80℃.The material showed the retention of a stable CO_(2) sorption capacity for many cycles at each temperature in the *** PH2O in the inlet air from 5.2 to 6.8 mbar leads to instability of CO_(2) sorption capacity which decreases in the course of 3 consecutive TSA cycles from 1.7%to 0.8%(mass)at T=29℃.A further increase in air humidity only facilitates the deterioration of the CO_(2) sorption capacity of the material.A possible explanation for this phenomenon could be the filling of the porous system of the sorbent with solid reaction products and an aqueous solution of potassium salts,which leads to a significant slowdown in the CO_(2) diffusion in the composite sorbent *** investigate the regeneration step of the TSA cycle in situ,the macro ATRFTIR(attenuated total reflection Fourier-transform infrared)spectroscopic imaging was applied for the first *** was shown that the migration of carbonate-containing species over the surface of sorbent occurs during the thermal regeneration stage of the TSA *** movement of the active component in the porous matrix of the sorbent can affect the sorption characteristics of the composite *** revealed features make it possible

关键词： Zirconia aerogel potassium carbonate Carbon dioxide Direct air capture Fourier-transform infrared spectroscopic imaging

Synthesis of Dimethyl carbonate from CO_2, Methanol, and Epoxides Using Re(CO)_5Cl/K_2CO_3 as Catalyst System

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Chemical Research in Chinese Universities 2007年第3期23卷 374-376页

作者： JIANG Jia-li HUA Rui-mao Department of Chemistry Innovative Catalysis Program Key Laboratory of Organic Optoelectronics ＆ Molecular Engineering of Ministry of Education Tsinghua University Beifing 100084 P. R. China

Over the past few years, dimethyl carbonate （DMC） has been proven to be an efficient methylating, methoxylating, and methoxycarbonylating agent in organic syntheses, in which DMC is used to replace the toxic methyl halides, dimethyl sulfate or carbon monoxide, and so forth. Furthermore, DMC has been used in the syntheses of polycarbonates and polyurethane to develop the nonphosgene routes Therefore, DMC has become one of the most important compounds in the development of green synthetic chemistry.

关键词： Carbon dioxide Dimethyl carbonate Epoxide Methanol potassium carbonate Rhenium

NO adsorption and temperature programmed desorption on K_2CO_3 modified activated carbons

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Journal of Central South University 2018年第10期25卷 2339-2348页

作者： YANG Dai-jun MA Xiao-wei LV Hong LI Bing ZHANG Cun-man School of Automotive Studies Tongji University Clean Energy Automotive Engineering Center Tongji University Department of Physics and Atmospheric Science Dalhousie University

Fuel cell stacks as the automotive power source can be severely poisoned by a trace amount of NOx in atmosphere,which makes it necessary to provide clean air for fuel cell *** this work,activating commercial activated carbons with K2CO3 for the large enhancement of NO capture was studied.K2CO3 modified activated carbons(K2CO3 ACs)were prepared by impregnating activate carbons in K2CO3 solution under ultrasound treatment,followed by temperature programmed baking at 800 *** dynamic NO flow tests on K2CO3 ACs at room temperature indicated that NO adsorption capacity reached the maximum(96 mg/g)when K2CO3 loading was 19.5 wt%,which corresponded to a specific surface area of 1196.1 m2/g and total pore volume of 0.70 cm3/*** ten-fold enhancement of NO adsorption on K2CO3 ACs compared to the unimpregnated activated carbon was mainly attributed to the formation of potassium nitrite,which was confirmed by FTIR and temperature programmed desorption *** tests of NO adsorption on the optimum sample revealed that 76%of the NO adsorption capacity could be remained after the fourth cycle.

关键词： activated carbon potassium carbonate modification NO adsorption temperature programmed desorption

Density functional theory study on the mechanism of CO2 capture by K2CO3/TiO2

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Density functional theory study on the mechanism of CO2 capt...

Facile and Efficient Synthesis of 1, 3-Dialkylimidazole-2-Selenones

第十三届全国量子化学会议

作者： Qiaoyun Qin Hongyan Liu Baojun Wang Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology

potassium carbonate has been considered to be a potentially effective sorbent to capturing CO from power station flue gas due to highly cost effective and an energy efficient[1]. A large number of studies have shown that bicarbonate formation the OH group breaks from HO and attacks the C atom of CO, and the low coverage of CO likely limits the rate of bicarbonate formation of dry potassium carbonate[2], a effective method is to load potassium carbonate on metal oxide[ 3 ]. In this study, the mechanisms of CO capture by K2CO/TiO were studied and identified by density functional theory（DFT）. The results show that K2CO molecules are clearly substantially stronger bind on this surface, and potassium carbonate molecule favor disperse on the rutile（110） surface in a appropriate coverage;The carbonate reaction is mainly focus on the edge of loaded potassium carbonate and the reaction mechanism have changed（show in Fig. 1）: the TiO surface catalyzed dissociation of molecule HO, leads to formation of OHt and OHb group, then the CO group depriving an H from OHb group and the gas CO molecule reaction with the OHt group leads to produce bicarbonate group.

关键词： CO2 capture potassium carbonate Titanium dioxide

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Facile and Efficient Synthesis of 1, 3-Dialkylimidazole-2-Se...

Preparation of K_2CO_3 Using Potassic Syenite from East Qinling Mountains

河南省化学会2014年学术年会

作者： Fengshou Tian Yahong Chen Peng Li Shiwei Lu Department of Chemistry Zhoukou Normal University Dalian Institute of Chemical Physics Chinese Academy of Sciences

A facile and efficient method for the synthesis of 1,3-dialkylimidazole-2-selenones is *** reaction of 1,3-dialkylimidazole salts with selenium in the presence of potassium carbonate in ethanol or acetone under reflux... 详细信息

关键词： 1 3-Dialkylimidazole salts 3-Dialkylimidazole-2-selenones Selenium potassium carbonate Ethanol Acetone

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 388-388页

作者： YANG Jing MA Hongwen QI Hongbin LUO Zheng ZENG Cheng School of Materials Science and Technology China University of Geosciences School of Mathematics and Physics China University of Geosciences

1 Introduction Songxian at East Qinling mountains in China possesses more than 100 million tons potassic syenite with the average K2O content of 13%and the main mineral phase of K-feldspar which is a kind of potential... 详细信息

关键词： potassic syenite potassium carbonate alkali-hydrothermal method