Co3O4的氢还原过程动力学研究.pdf

第36卷第8期 金属学坂 Vbl．36NO．8 2000年8月 ACTAMETALLURGICASINICA 2 000 August C0304的氢还原过程动力学研究 刘建华 张家芸 周土平 魏寿昆 aE京科技大学理化系，北京100083) 摘 要 和CoO还原为Co两个步骤，二步骤均为界面化学反应控速．在523—_603K等温及503—589K非等温条件下， Coa04 还原为CoO步骤的表观活化能均为133kJ／mol；523—-603K等温还原CoO为Co步骤的表观活化能为87．5 kJ／t001． 关键词氢，C0304，还原动力学，热重分析 中图法分类号0614，812，0643．1文献标识码A KINETICSoFREDUCTIoNoF BY C0304 LIU U Shoukun Jianhua，ZHANGJiayun，ZHOTuping，WEI of ofScienceand 100083 DepartmentPhysicalChemistry,UniversityTechnologyBeijing，Beijing Correspondent：ZHANG received1999—11—04．inrevisedform2000-02-21 Manuscript ABSTRACTThekineticsofreductionof hasbeenstudiedthethermo- C030dbyhydrogen using and hasbeenconfirmedthatthewholereduc— gravimetrictechniqueisothermallynon-isothermally．It tion underbothiso—andnoniso-thermalconditionsare oftwointerfacialchemical process composed reactioncontrolled reductionof toCOOandCOOtoCo．Theactivationof steps：the C0304 energies thereductionof toCOOobtainedfromisothermalTGAmeasurementsinthe of523— C030d range inthe of 603Kandfromnon-isothermalTGAmeasurements 503—589Ktakethesamevalue range of toCO of133 activationofthereductionCOO obtainedfromisothermal