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题名: Heat Capacities and Nonisothermal Thermal Decomposition Reaction Kinetics of D-Mannitol
作者: Tong, Bo3;  Liu, Rui-Bin3;  Meng, Chang-Gong3;  Yu, Feng-Yun2;  Ji, Shou-Hua2;  Tan, Zhi-Cheng1
刊名: JOURNAL OF CHEMICAL AND ENGINEERING DATA
发表日期: 2010
DOI: 10.1021/je900285w
卷: 55, 期:1, 页:119-124
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The low-temperature heat capacity C(p,m) of D-mannitol was measured in the temperature range from (80 to 390) K by means of a fully automated adiabatic calorimeter. The dependence of heat capacity on the temperature was fitted to a polynomial equation with the least-squares method. The thermodynamic functions (H(T) - H(298.15) (K)) and (S(T) - S(298.15) (K)) were derived from the heat capacity data ill the temperature range of (80 to 390) K with an interval of 5 K. The melting temperature, molar enthalpy, and entropy of fusion were determined to be (437.25 +/- 0.12) K, (54.69 +/- 1.64) kJ.mol(-1), and (125.08 +/- 3.75) J.K(-1).mol(-1) by DSC measurements. The thermal stability and nonisothermal thermal decomposition kinetics of the compound were studied by the TG-DTG technique Under atmospheric pressure and flowing nitrogen gas conditions. The thermal decomposition process had one mass loss stage, and the apparent activation energy E(a) was obtained to be (120.61 +/- 1.85) kJ.mol(-1) by the Kissinger, Friedman, and Flynn-Wall-Ozawa methods. The Malek method Was used to identify the most probable kinetic model SB(m, n). The kinetics model function and the pre-exponential factor A were expressed to be: f(alpha) = alpha(0.306)(1 - alpha)(0.381); In A = 17.88, respectively.
关键词[WOS]: THERMODYNAMIC PROPERTIES ;  NATURAL POLYOLS ;  ADIABATIC CALORIMETER ;  SMALL SAMPLES ;  SWEETENERS ;  STABILITY ;  STATE ;  ACID
语种: 英语
WOS记录号: WOS:000273405200017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141731
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Mat Testing Ctr, Dalian 116023, Peoples R China
3.Dalian Univ Technol, Sch Chem Engn, Dept Chem, Dalian 116023, Peoples R China

Recommended Citation:
Tong, Bo,Liu, Rui-Bin,Meng, Chang-Gong,et al. Heat Capacities and Nonisothermal Thermal Decomposition Reaction Kinetics of D-Mannitol[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2010,55(1):119-124.
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