Thermal Characteristics of LaMnO3 Non-isothermal Synthesis Reaction

LaMnO3 비등온 합성반응의 열적특성

  • Jeon, Jong Seol (Department of Chemical Engineering, Chungnam National University) ;
  • Lee, Jung Hun (Department of Chemical Engineering, Chungnam National University) ;
  • Yoon, Chang Hyeok (Department of Chemical Engineering, Chungnam National University) ;
  • Yoo, Dong Jun (Department of Chemical Engineering, Chungnam National University) ;
  • Lim, Dae Ho (Department of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (Department of Chemical Engineering, Chungnam National University)
  • 전종설 (충남대학교 화학공학과) ;
  • 이정훈 (충남대학교 화학공학과) ;
  • 윤창혁 (충남대학교 화학공학과) ;
  • 유동준 (충남대학교 화학공학과) ;
  • 임대호 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과)
  • Received : 2016.01.05
  • Accepted : 2016.01.22
  • Published : 2016.06.01


Thermal Characteristics and kinetic parameters of $LaMnO_3$ synthesis reaction were investigated by means of TGA (Thermogravimetric analysis) at non-isothermal heating conditions (5.0, 10.0, 15.0 and 20.0 K/min). The reaction was occurred rapidly at 450~600K (X=0.4~0.7) depending on the heating rate. Activation energy for the synthesis of $LaMnO_3$ from the precursor, which was determined by different method such as Friedman, Ozawa-Flynn-Wall and Vyazovkin methods, was in the range of 23~243 kJ/g-mol depending on the fractional conversion level and estimation method. The reaction order decreased with increasing heating rate and fractional conversional level. The average reaction order was 4.50 in case of X=0.1~0.3, while it was 1.87 in case of X=0.7~0.9, respectively. The value of frequency factor of reaction rate increased with inceasing heating rate and fractional conversion level. The aveage value of frequency factor was 205.6 ($min^{-1}$) when X=0.1~0.3, while it was 475.2 ($min^{-1}$) when X=0.7~0.9, respectively.


Supported by : 한국연구재단


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