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Study on CO_2 Absorption by Aqueous benzylamine and Its Formulations with Monoethanolamine as a Component for Post-Combustion Capture Process

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China Petroleum Processing & Petrochemical Technology 2016年第3期18卷 7-14页

作者： Gao Jie Yin Jun Zhu Feifei Chen Xin Tong Ming Kang Wanzhong Zhou Yanbo Lu Jun Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education East China University of Science & Technology SINOPEC Ningbo Engineering Co. Ltd.

benzylamine(BZA) has been identified as a promising candidate for CO_2 capture process; however the evaluation of BZA in the packed column was very few. Thus, in this work, the absorption and regeneration performance of unblended BZA solvent as well as a series of amine concentrations and ratios in the formulations were studied using a semibatch bubbling reactor. And due to the formation of ivory-white precipitates in solvents containing higher BZA ratios, a 4:1 molar ratio of MEA/BZA mixed solvent was used to study its performance in a pilot-scale test bed. The results showed that a higher BZA ratio in the MEA/BZA mixed solvent resulted in a faster absorption rate, a higher mass transfer and heat transfer rate and a better cyclic performance, but the mass transfer rate of BZA decreased more quickly than MEA with the increase of CO_2 loading of the solvents. In addition, at high CO_2 loading in the MEA/ BZA mixed solvent with a molar ratio of 4:1, the ivory-white precipitates were generated which could cause blockage of the packing in the absorber, the stripper and the liquid pipelines.

关键词： benzylamine (BZA) monoethanolamine (MEA) post combustion CO2 capture pilot plant mass transfer

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CO_(2)-adsorbent spongy electrode for non-aqueous Li–O_(2) batteries

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Journal of Energy Chemistry 2022年第2期31卷 646-653页

作者： Yiseul Yoo Giseung Lee Min-Gi Jeong Hun-Gi Jung Sunghee Shin Dongjin Byun Taeeun Yim Hee-Dae Lim Center for Energy Storage Research Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seongbuk-guSeoul 02792Republic of Korea Department of Materials Science and Engineering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea Department of Chemistry Incheon National University119 Academy-roYeonsu-guIncheon 22012Republic of Korea Department of Chemical and Biological Engineering Korea UniversitySeoul 02841Republic of Korea

Regulation of the Li_(2)CO_(3) byproduct is the most critical challenge in the field of non-aqueous Li–O_(2) batteries.Although considerable efforts have been devoted to preventing Li_(2)CO_(3) formation,no approaches have suggested the ultimate solution of utilizing the clean Li_(2)O_(2) reaction instead of that of Li_(2)CO_(3).Even if extremely pure O_(2) is used in a Li–O_(2) cell,its complete elimination is impossible,eventually generating CO_(2) gas during charge.In this paper,we present the new concept of a CO_(2)-adsorbent spongy electrode(CASE),which is designed to trap the evolved CO_(2) using adsorption materials.Various candidates composed of amine functional groups(–NH2)for capturing CO_(2) were screened,with quadrapurebenzylamine(QPBZA)exhibiting superior CO_(2)-adsorbing ability among the proposed candidates.Accordingly,we fabricated the CASE by sandwiching QPBZA between porous carbon layers,which facilitated the transport of gaseous products.The new electrode was demonstrated to effectively capture the evolved CO_(2) during charge,therefore altering the reaction pathways to the ideal case.It is highly advantageous to mitigate the undesirable CO_(2) incorporation in the next discharge,resulting in improved cyclability.This novel concept of a CO_(2)-sponging electrode provides an alternative route to the realization of practically meaningful Li–O_(2) batteries.

关键词： Li-O_(2)battery benzylamine CO_(2)adsorption Li_(2)CO_(3) Li_(2)O_(2) CO_(2)-sponging electrode

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Highly efficient photocatalytic dehydrogenative coupling of amines with supported platinum catalyst under the oxidant-free conditions

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Green Chemical Engineering 2022年第4期3卷 313-320页

作者： Peng Bai Guobao Yang Haijing Sun Xinli Tong School of Chemistry and Chemical Engineering Tianjin University of TechnologyTianjin300384China

A highly efficient photocatalytic dehydrogenative coupling(PDC)of amines to prepare value-added imines has been developed under the mild conditions.A complete conversion of benzylamine with a 99%selectivity of Nbenzylidenebenzylamine could be obtained using the 2%Pt@g-C_(3)N_(4)as photocatalyst in the absence of hydrogen acceptor at room temperature.Moreover,the relationship between the physical properties of different photocatalysts and their activities has been discussed according to the characterization results of the XRD,BET,SEM,TEM,and XPS techniques.Next,the PDC of different amines have been further investigated,where ca.70.2%-99.0%yields of corresponding imines were attained.Finally,based on the experimental results and heterogeneous catalytic principle,a possible reaction mechanism for the PDC of benzylamine is proposed.

关键词： Photocatalysis Green synthesis benzylamine Acceptorless dehydrogenation Platinum

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Improvement on the Synthesis of Primary Amino Sugar Derivatives <i>via</i><i>N</i>-Benzyl Intermediates

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International Journal of Organic Chemistry 2013年第3期3卷 41-48页

作者： Massimo Corsi Marco Bonanni Giorgio Catelani Felicia D’Andrea Tiziana Gragnani Roberto Bianchini Dipartimento di Chimica Università di Firenze Florence Italy Dipartimento di Farmacia Università di Pisa Pisa Italy

Primary tosylates 1a-d were converted to the corresponding amino species 3a-d. benzylamine was proved effective for the substitution of tosylates, using acetonitrile (MeCN) as the solvent of choice and citric acid to remove excess of the reagent from crude products 2a-d. Debenzylation was carried out at circa (ca.) atmospheric pressure of hydrogen gas in the presence of acetic acid (AcOH). The method was also demonstrated in a demo batch experiment for the synthesis of compound 3a on a 50 g scale of 1a.

关键词： Amino Sugars Nucleophilic Substitution benzylamine Primary Tosylates

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