摘要
基于烧结微纤结构材料发展了一种集微混合、反应和换热于一体的微反应器,以苯硝化为模型反应考察了该微反应器用于快速、强放热的液-液两相混合反应的效果.烧结微纤材料具有大的空隙率、三维开放孔结构和大的面积与体积比,有利于传质和传热,同时微纤三维网络具有微搅拌器的作用,有利于流体的微米尺度分割和快速混合.因此,苯硝化反应得以在很短的时间内高选择性地进行完全.在一定的操作条件下,苯转化率可以达到91.7%,硝基苯选择性高达99.4%.
A microreactor with an integrated heat-exchanger has been developed for strongly exothermic liquidliquid reactions on the basis of novel metallic microfibrous structure. The microreactor was made from simply inserting quadrate pieces of the microfibrous media in the reaction and heat-exchange chambers. This microreactor was examined in the use with the nitration of benzene. This new approach facilitates mass and heat transfer by taking the beneficial properties in terms of large void volume, three-dimensional micron-grade pore structure, and large surface area to volume ratio. Note that three-dimensional network structure acts as a micromixer thereby leading to micronic segmentation and fast mixing of fluids. The results showed that nitration of benzene could proceed completely in this novel microreactor with high selectivity at a short residence time. The selectivity of 99.4% to nitrobenzene was achieved with a benzene conversion of 91.7% at a residence time of 30 s and 60 ℃.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期931-933,共3页
基金
国家自然科学基金(20590366
20573036)
上海市科委重大基础项目(05DJ14002)
上海市重点学科建设(B409)
新世纪优秀人才支持计划(NCET-06-0423)
上海市"曙光计划"(06SG028)
华东师范大学2007年优秀博士研究生培养基金
关键词
微纤
微反应器
苯
硝化
microfiber
microreactor
benzene
nitration
