Page 58 - 《精细化工》2021年第10期
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第 38 卷第 10 期                            精   细   化   工                                 Vol.38, No.10
             2021 年 10 月                             FINE CHEMICALS                                  Oct.  2021


              功能材料
                              仲胺桥联共价三嗪聚合物对 CO 的
                                                                                     2

                                                高选择性吸附



                                                                           *
                                             沙芯如,张金菊,刘安华
                             (大连理工大学  化工学院  精细化工国家重点实验室,辽宁  大连  116023)

                 摘要:针对有机聚合物材料对 CO 2 的吸附量和吸附选择性不能兼得的问题,由三(4-氰胺基苯基)胺和四(4-氰胺
                 基苯基)甲烷设计合成了仲胺桥联共价三嗪聚合物 NB-CTP-1 和 NB-CTP-2,通过 FTIR、TGA、XRD、SEM、TEM
                                                                            5
                 和全自动物理吸附分析仪对制备的样品进行了结构和形貌表征。在 1.01×10 Pa、273 K 条件下,NB-CTP-1 和
                                                                                                    5
                 NB-CTP-2 的 CO 2 吸附量分别为 3.04 和 3.23 mmol/g。依据亨利定律法和 IAST 法分别对两种材料在 1.01×10  Pa、
                 273 K 条件下的吸附选择性进行计算,其中,NB-CTP-1 的 CO 2 /N 2 吸附选择性高达 113 (亨利定律法)和 143
                 (IAST 法),而 NB-CTP-2 也能达到 75(亨利定律法)和 89(IAST 法)。此外,通过 Clausius-Clapeyron 方程
                 计算得出 NB-CTP-1 和 NB-CTP-2 的极限吸附热分别为 35.3 和 37.6 kJ/mol,表明其与 CO 2 存在较强的偶极-四极
                 相互作用,有利于提升吸附选择性。
                 关键词:共价三嗪聚合物;CO 2 ;捕集;吸附选择性;吸附热;碳中和;碳达峰;功能材料
                 中图分类号:X701;O647.3;O631.2     文献标识码:A      文章编号:1003-5214 (2021) 10-1988-08


                                Nitrogen-bridged covalent triazine polymer for
                                            highly selective CO 2 capture


                                                                             *
                                           SHA Xinru, ZHANG Jinju, LIU Anhua
                                 (State Key Laboratory of Fine Chemicals, School of Chemical Engineering,
                                    Dalian University of Technology, Dalian 116023, Liaoning, China)


                 Abstract:  Nitrogen-bridged covalent triazine polymers NB-CTP-1 and  NB-CTP-2 were  designed and
                 synthesized from tris(4-cyanamidophenyl)amine and tetrakis(4-cyanamidophenyl)methane to address the
                 issue of  trade-off between CO 2 adsorption capacity and CO 2/N 2 adsorption selectivity among  the
                 well-established organic polymers. The structure and morphology features of the prepared samples were
                 characterized by means of FTIR, TGA, XRD, SEM, TEM and automatic physical adsorption analyzer. The
                 NB-CTP materials showed good CO 2 adsorption capacities (3.04 mmol/g for NB-CTP-1, 3.23 mmol/g for
                                        5
                 NB-CTP-2) under  1.01×10  Pa and 273  K conditions. Based on the reversible adsorption-desorption
                                   5
                 isotherms at 1.01×10  Pa and  273  K, CO 2/N 2  selectivity  for NB-CTP-1 was obtained  as high  as 113
                 (Henry's law) and 143 (IAST), whereas for NB-CTP-2, it was 75 (Henry's law) and 89 (IAST). In addition,
                 the enthalpy of adsorption at zero coverage for NB-CTP-1 (35.3 kJ/mol) and NB-CTP-2 (37.6 kJ/mol)
                 were calculated  using the Vant Hoff  equation  based  on  Virial  equation, revealing the strong
                 dipole-quadrupole interactions between these materials and CO 2, which could enhance the CO 2/N 2
                 adsorption selectivity.
                 Key words:  covalent triazine polymer;  carbon dioxide; capture; adsorption selectivity; enthalpy of
                 adsorption; carbon neutrality; peak carbon dioxide emissions; functional materials


                 收稿日期:2021-04-19;  定用日期:2021-06-08; DOI: 10.13550/j.jxhg.20210405
                 基金项目:大连理工大学基本科研业务费项目(DUT20LK17)
                 作者简介:沙芯如(1996—),女,硕士生,E-mail:a516701195@163.com。联系人:刘安华(1985—),男,副教授,E-mail:ahliu@dlut.
                 edu.cn。
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