Arenas Castiblanco Erika, Montoya Juan Henao, Rincón Gabriela Valencia, Zapata-Benabithe Zulamita, Gómez-Vásquez Rafael, Camargo-Trillos Diego A
Grupo de Energía y Termodinámica, Facultad de Ingeniería Química, Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 No. 70-01, Medellín, 050031, Antioquia, Colombia.
Semillero de Termofluidos y Conversión de La Energía, Facultad de Ingeniería Química, Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 No. 70-01, Medellín, 050031, Antioquia, Colombia.
Heliyon. 2022 Aug 12;8(8):e10195. doi: 10.1016/j.heliyon.2022.e10195. eCollection 2022 Aug.
A new approach is proposed to obtain the kinetic parameters of biomass pyrolysis mixed with calcium catalyst. This approach involves the optimization of least squares (LS) with the Coats-Redfern integral method to avoid mathematical biases that may appear when applying the linear regression approach. The method was applied to the TGA data of pyrolysis of corn cob and corn cob mixed with 20 or 40 % by weight of CaO or CaCO under N atmosphere at temperatures between 25 and 700 °C. For raw cob, r reaches 0.997. For corn cob mixed with 20 % by weight of CaO or CaCO, r reached 0.996-0.998, and for 40 % by weight, r reached 0.836-0.957. Applying this method, the activation energy (EA) value of the raw cob pyrolysis is 58.35 kJ mol, while the addition of CaO or CaCO increases the EA to 69.33 and 66.07 kJ mol, respectively. The method is simple to use and allows reliable values of kinetic parameters.
提出了一种获取生物质与钙催化剂混合热解动力学参数的新方法。该方法涉及用Coats-Redfern积分法对最小二乘法进行优化，以避免应用线性回归方法时可能出现的数学偏差。该方法应用于玉米芯以及在25至700°C温度下于氮气气氛中与20%或40%（重量）的CaO或CaCO混合的玉米芯热解的热重分析（TGA）数据。对于生玉米芯，r达到0.997。对于与20%（重量）的CaO或CaCO混合的玉米芯，r达到0.996 - 0.998，而对于40%（重量）的情况，r达到0.836 - 0.957。应用该方法，生玉米芯热解的活化能（EA）值为58.35 kJ/mol，而添加CaO或CaCO分别将EA提高到69.33和66.07 kJ/mol。该方法使用简单，并能得到可靠的动力学参数值。
