熔融三元碳酸盐催化芦竹热解实验研究  

Experimental study on the pyrolysis of Arundo donax catalyzed by molten ternary carbonate

作　　者：封萍 褚会鑫 贺渝 高莹 白音达 梅磊 朱学帅[1] FENG Ping;CHU Huixin;HE Yu;GAO Ying;BAI Yinda;MEI Lei;ZHU Xueshuai(School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;State Power Investment Corporation Science and Technology Research Institute Co.,Ltd.,Beijing 100221,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]国家电投集团电站运营技术(北京)有限公司,北京100221

出　　处：《实验技术与管理》2025年第2期162-168,共7页Experimental Technology and Management

基　　金：国家自然科学基金项目(51604281);中国矿业大学(北京)本科教育教学改革与研究重点项目(J22ZD07);教育部产学研合作协同育人项目(231007568282236);大学生创新训练项目(202403046)。

摘　　要：熔融盐具有较高的热容和导热系数,加热速度较无熔融盐时可高出4~10倍,可作为一种优良的储热和反应介质,熔融盐热解是一种高效、环保的生物质能源转化技术。将熔融盐催化芦竹热解应用于科研创新训练教学中,能够引导学生从实验设计、设备搭建、产物表征等方面形成科学思维。该文以熔融三元碳酸盐(Li_(2)CO_(3)-Na_(2)CO_(3)-K_(2)CO_(3))作为传热介质和催化剂,设计了芦竹热解特性实验。实验结果表明,熔融盐催化可显著提高芦竹热解效率,在650℃时,热解气产率达65%以上,产量约为352.67 mL/g。其中,H_(2)约占热解气的44.39%,约为单独热解的H2产率的1.7倍。熔融盐催化还可同时增大半焦的孔容积和比表面积,改善表面含氧官能团分布。[Objective]The heat transfer efficiency in traditional pyrolysis processes of biomass is relatively low.Meanwhile,the liquid product yield is high during medium-and low-temperature pyrolysis,which is difficult to directly utilize.Therefore,exploring rapid heating technology is beneficial for improving the pyrolysis efficiency of biomass fuels.In this respect,molten salt has high heat capacity and thermal conductivity,and the heating rate can be 4–10 times higher than that without molten salt.It can be used as an excellent heat storage and reaction medium.Thus,the use of molten salt pyrolysis is an efficient and environmentally friendly biomass conversion technology.[Methods]In this study,molten-salt-catalyzed Arundo donax pyrolysis was applied in scientific research and innovation training and teaching.Molten salt energy storage was combined with traditional biomass pyrolysis technology to guide students in scientific thinking from experimental design,equipment construction,product characterization,and mechanism exploration.In this study,a molten salt energy storage biomass pyrolysis reaction system was independently designed,which utilized molten salt to store heat for the preparation of hydrogen-rich gas from A.donax pyrolysis.A molten ternary carbonate(Li_(2)CO_(3)-Na_(2)CO_(3)-K_(2)CO_(3),with a mass ratio of 1∶1∶1)suitable for biomass pyrolysis was selected as the heat transfer medium and catalyst in the melting temperature range.The pyrolysis of A.donax was designed,and the compositions of the pyrolysis products were characterized.[Results]The results indicated that at the same temperature,molten salt catalysis can significantly improve the pyrolysis efficiency of A.donax,and the catalytic effect was more pronounced in the high-temperature zone.At 650℃,the pyrolysis gas yield of A.donax catalyzed by molten salt reached over 65%,with a yield of~352.67 mL/g,which was about one-third higher than that of pyrolysis alone.H2 accounted for about 44.39%of the pyrolysis gas,which was about 1.7 times the yiel

关 键 词：熔融盐 生物质 热解碳酸盐 储能 

分 类 号：TQ424.1[化学工程] G642.423[文化科学—高等教育学]