化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年
2期
312-318
,共7页
膜%反应动力学%传质%反应器
膜%反應動力學%傳質%反應器
막%반응동역학%전질%반응기
membranes%reaction kinetics%mass transfer%reactors
对聚合物膜催化接触器的特点、所用催化膜材料及其制备方法进行归纳总结。与传统催化反应器相比,聚合物膜催化接触器具有结构紧凑,工艺及操作流程简单,催化活性、反应速率及转化率高等特点。所用聚合物膜材料分子主链和侧链具有丰富的功能基团,以便引入活性纳米粒子或基团,得到高活性的催化膜。聚合物催化膜制备方法主要有杂化法、浸渍法及化学接枝法。扩散过程为聚合物膜接触器催化反应过程的控制步骤,整个过程包括内扩散和外扩散两个步骤。文中最后提出聚合物膜催化接触器应用中存在的问题,即催化效率和使用寿命有待进一步提高;新型聚合物催化膜材料亟需开发,膜污染和催化膜失活问题亟待解决;膜催化反应动力学模型的建立和研究等关键性、基础性问题还需要更加深入地研究。
對聚閤物膜催化接觸器的特點、所用催化膜材料及其製備方法進行歸納總結。與傳統催化反應器相比,聚閤物膜催化接觸器具有結構緊湊,工藝及操作流程簡單,催化活性、反應速率及轉化率高等特點。所用聚閤物膜材料分子主鏈和側鏈具有豐富的功能基糰,以便引入活性納米粒子或基糰,得到高活性的催化膜。聚閤物催化膜製備方法主要有雜化法、浸漬法及化學接枝法。擴散過程為聚閤物膜接觸器催化反應過程的控製步驟,整箇過程包括內擴散和外擴散兩箇步驟。文中最後提齣聚閤物膜催化接觸器應用中存在的問題,即催化效率和使用壽命有待進一步提高;新型聚閤物催化膜材料亟需開髮,膜汙染和催化膜失活問題亟待解決;膜催化反應動力學模型的建立和研究等關鍵性、基礎性問題還需要更加深入地研究。
대취합물막최화접촉기적특점、소용최화막재료급기제비방법진행귀납총결。여전통최화반응기상비,취합물막최화접촉기구유결구긴주,공예급조작류정간단,최화활성、반응속솔급전화솔고등특점。소용취합물막재료분자주련화측련구유봉부적공능기단,이편인입활성납미입자혹기단,득도고활성적최화막。취합물최화막제비방법주요유잡화법、침지법급화학접지법。확산과정위취합물막접촉기최화반응과정적공제보취,정개과정포괄내확산화외확산량개보취。문중최후제출취합물막최화접촉기응용중존재적문제,즉최화효솔화사용수명유대진일보제고;신형취합물최화막재료극수개발,막오염화최화막실활문제극대해결;막최화반응동역학모형적건립화연구등관건성、기출성문제환수요경가심입지연구。
In this paper, the characteristics of polymeric membrane catalytic contactor, catalytic membrane materials and preparation methods are summarized. Compared with the traditional catalytic reactor,polymeric membrane catalytic contactor has the advantages of compact structure,simple technology and operation process,high catalytic activity,high reaction rate and high conversion rate. Active nanoparticles or groups can be easily introduced onto molecular backbone and side chains which are bonded with lots of functional groups. The preparation methods of polymeric catalytic membrane mainly include hybrid method,dipping method and chemical grafting method. Diffusion process is the controlling step of catalytic reaction process of polymeric membrane catalytic contactor. The whole process includes internal diffusion and external diffusion. Some problems deserving further research and application prospects of polymeric membrane catalytic contactor are presented. Catalytic efficiency and service life need to be further improved;novel polymeric membrane materials need to be developed;membrane fouling and membrane catalytic deactivation problems need to be resolved;basic issues, such as establishing kinetic model of polymeric membrane catalytic reaction need to be further studied.