盘管式流量逆变微反应器中光化学合成H_(2)O_(2)的研究  

Study on photochemical synthesis of H_(2)O_(2) in coiled flow inverter microreactor

作　　者：马骏 金央[1] 李军[1] 陈明 王玉滨[1] MA Jun;JIN Yang;LI Jun;CHEN Ming;WANG Yubin(School of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《无机盐工业》2025年第2期50-56,共7页Inorganic Chemicals Industry

摘　　要：为了绿色可持续地便捷化合成H_(2)O_(2),采用盘管式流量逆变微反应器(CFIMR)进行光激发苯甲醇(BA)合成H_(2)O_(2)的强化研究。系统研究了CFIMR光反应系统中,原料单次停留时间、光强和累计停留时间对光激发BA合成H_(2)O_(2)效率的影响,通过反应-萃取耦合和气-液两相流强化等方法进行了进一步优化。研究结果表明,在CFIMR中,在50 s的最佳单次停留时间下,H_(2)O_(2)平均合成速率(r)为0.5633 mmol/(L·min)。在最佳的辐照方式下,BA单相流的累计停留时间达到200 s时,BA相中H_(2)O_(2)浓度高达1.7623 mmol/L。通过引入反应-萃取耦合过程优化技术,简化工艺流程,r可达0.3762 mmol/(L·min);在pH=1.0的酸性条件下,r达到最高[1.2041 mmol/(L·min)];最佳H_(2)O/BA体积流量比下r为0.4580 mmol/(L·min);采用气-液两相流强化方法,r高达0.8832 mmol/(L·min)。CFIMR内BA单相流、H_(2)O-BA两相流和空气-BA两相流三种方式的r分别达到常规的光激发BA合成H_(2)O_(2)的151.06%、100.88%和236.85%。结果表明,在高光子通量密度和优异混合传质性能的CFIMR内光化学合成H_(2)O_(2)具有操作灵活和高效快速的优势。In order to synthesize H_(2)O_(2) in a green,sustainable,and convenient manner,the intensified study on the synthesis of H_(2)O_(2) from benzyl alcohol(BA)under photoexcitation using a coiled flow inverter microreactor(CFIMR)was conducted.The effects of the residence time,light intensity,and cumulative residence time on the efficiency of H_(2)O_(2) synthesis from BA under photoexcitation in the CFIMR photoreaction system were systematically investigated,and further optimization was car-ried out through methods such as reaction-extraction coupling and enhancement of gas-liquid two-phase flow.The results of the study showed that in the CFIMR,at the optimal single residence time of 50 s,the average synthesis rate of H_(2)O_(2)(r)was 0.5633 mmol/(L·min).Under the optimal irradiation conditions,when the cumulative residence time of the BA single phase reached 200 s,the concentration of H_(2)O_(2) in the BA phase reached as high as 1.7623 mmol/L.By introducing reaction-extraction coupling optimization techniques to simplify the process,r was 0.3762 mmol/(L·min).Under acidic conditions at pH=1.0,the highest r reached was 1.2041 mmol/(L·min).The r under the optimal H_(2)O/BA volume flow rate ratio was 0.4580 mmol/(L·min).Through the employment of gas-liquid two-phase flow intensification methods,the maximum value of r reached 0.8832 mmol/(L·min).In the CFIMR,the synthesis rates(r)of BA single-phase flow,H_(2)O-BA two-phase flow,and air-BA two-phase flow reached 151.06%,100.88%,and 236.85%,respectively,compared to conventional photo-excited BA synthesis of H_(2)O_(2).It demonstrated the operational flexibility and high efficiency of photochemical synthesis of H_(2)O_(2) inside the CFIMR,which was attributed to its high photon flux density and excellent mixing and mass transfer perfor-mance.

关 键 词：盘管 微反应器 光化学合成 H_(2)O_(2) 苯甲醇 

分 类 号：TQ123.6[化学工程—无机化工]