烟酸锶[Sr(C6H4NO2)2·3H2O]的热解动力学Thermal Decomposition Kinetics of Sr(C6H4NO2)2·3H2O
廖辉伟,潘雅妹,周远
摘要(Abstract)：
采用TG-DTG/DTA等方法对新合成的烟酸锶[Sr(C6H4NO2)2·3H2O]的热解过程及其动力学行为进行了研究,并利用非等温动力学原理,通过Flynn-Wall-Ozawa,Kissinger,Friedman和Freeman-Carroll等方法,计算得到烟酸锶三步热解过程的动力学参数。结果表明烟酸锶的热解分为三步,第一步为失去结晶水的过程,第二步和第三步为配体失去和配合物结构坍塌的过程;活化能(E)分别为(68.03±0.38),(369.98±9.76),(255.53±7.53)kJ·mol-1;指前因子(lgA)分别为7.68,24.69,12.88;反应级数(n)分别为1.1,2.8,1.4。同时采用Coats-Redfern法确定了烟酸锶三步热解阶段可能的机理函数及热解动力学方程。通过多步线性回归方法,确定烟酸锶三步热解过程的最佳动力学模型分别为F1(n=1),2D(n=2),AE4(n=4)。
关键词(KeyWords)： 烟酸锶;热解;热解动力学;热重法
基金项目(Foundation): 国家科技支撑计划(2009BAE85B02)
作者(Author): 廖辉伟,潘雅妹,周远
参考文献(References)：
- [1]DI You-ying(邸友莹),KONG Yu-xia(孔玉霞),ZHANG Shuang(张双),et al.Synthesis,characterization and thero-chemistry of the hydrated barium nicotinate(水合烟酸钡的合成结构表征和热化学性质)[J].Acta Phys-Chim Sin(物理化学学报),2008,24(10):1884-1890.
- [2]Di Y Y,Kong Y X,Yang W W,et al.Synthesis,characterization,and thermodynamic study of solid state coordination compound Ca(Nic)2(s)(Nic=Nicotinate)[J].J Chem Eng Data,2008,53(12):2777-2782.
- [3]WENG Shi-fu(翁师釜).Fourier transform infrared spectromete(傅里叶变换红外光谱仪)[M].Beijing(北京):Chemical Industry Press(化学工业出版社),2005:249.
- [4]HU Rong-zu(胡荣祖),GAO Sheng-li(高胜利),ZHAO Feng-qi(赵凤起),et al.Thermal analysis kinetics(热分析动力学),Version 2(第2版)[M].Beijing(北京):Science Press(科学出版社),2008:57,63-64,117,151-159.
- [5]Zhan D,Cong C J,Diakite K,et al.Kinetics of thermal decomposition of nickel oxalate dehydrate in air[J].Thermochim Acta,2005,430(1/2):101-105.
- [6]Kissinger H E.Reaction kinetics in differential thermal analysis[J].Anal Chem,1957,29(11):1702-1706.
- [7]LIU Zhen-hai(刘振海),GUI Shan-lizi(龟山立子).Analytical chemistry manual:thermal analysis(分析化学手册:热分析)[M].Beijing(北京):Chemical Industry Press(化学出版社),2000:46.
- [8]CHEN Li-yu(陈立宇),LEI Peng(雷鹏),SHI Bo-hui(师博辉),et al.Study on the thermodynamics of methane partial oxidation in oleum(甲烷在发烟硫酸体系中部分氧化反应的热力学研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2012,26(3):365-369.
- [9]WANG Lin(王琳),LI Ru-lin(李入林),CHEN Wen-tao(陈文涛),et al.Thermal decomposition mechanism and kinetics of N-(phenylacetamido)-N'-(α-naphthylaceto)thiourea(N-(苯乙酰氨基)-N'-(α-萘乙酰基)硫脲的热解机理及热动力学研究)[J].Acta Chimica Sinica(化学学报),2009,67(8):838-842.
- [10]Su T T,Jiang H,Gong H.Thermal decomposition and dehydration kinetic studies on hydrated Co(II)methanesulfonate[J].Thermochim acta,2005,435(1):1-5.
- [11]Freeman E S,Carroll B.The application of thermoanalytical techniques to reaction kinetics:the thermo-gravimetric evaluation of the kinetics of the decomposition of calcium oxidation monohydrate[J].J Phys Chem,1958,62(4):394-397.
- [12]XU Fen(徐芬),SUN Li-xian(孙立贤),TAN Zhi-cheng(谭志诚),et al.Studies on thermal decompsition mechanism and kinetics of aspirin(阿司匹林的热解机理及热动力学研究)[J].Acta Phys-Chim Sin(物理化学学报),2004,20(1):50-54.
- [13]Coats A W,Redfern J P.Kinetic parameters from thermogravimetric data[J].Nature,1964,201(4914):68-69.
- [14]ZHAO Xue-bing(赵雪冰),LIU De-hua(刘德华).Pyroly of formic acid lignin and acetic acid lignin isolated from crofton weed stem(紫茎泽兰甲酸和乙酸木素的热解)[J].J Tsinghua Univ(Sci&Tech)(清华大学学报),2011,51(6):814-819.
- [15]Eftimie E,Segal E.Basic language programs for automatic processing non-isothermal kinetic data[J].Thermolchim Acta,1987,111(8):359-367.
- [16]WANG Shao-xu(王韶旭),LIN Lu(林璐),TAN Zhi-cheng(谭志诚),et al.Thermal stability and kinetics of thermal decomposition of naringin(柚皮苷的热稳定性及其热分析动力学研究)[J].Acta Chimica Sinica(化学学报),2010,68(21):2156-21.