Utilizing calcium aluminate(CaAlO)as a catalyst in lignocellulosic biomass pyrolysis offers dual advantages of cost saving and mitigating environmental pollution from industrial waste.This study employs kinetic analys...Utilizing calcium aluminate(CaAlO)as a catalyst in lignocellulosic biomass pyrolysis offers dual advantages of cost saving and mitigating environmental pollution from industrial waste.This study employs kinetic analysis to validate the catalytic effect of CaAlO on biomass pyrolysis.Thermalgravimetric analysis of walnut shell pyrolysis was conducted,incorporating CaAlO,CaO,and Al_(2)O_(3) additives to examine catalytic pyrolysis and gas release characteristics.The results reveal that CaAlO exhibits a catalytic effect similar to that of CaO and Al_(2)O_(3),suggesting its potential as an effective catalyst.Activation energies obtained without additive and with CaAlO,CaO,and Al_(2)O_(3) by Friedman method are 184,178,158,and 176 kJ·mol^(-1),while by Flynn-Wall-Ozawa(FWO)method are 186,179,160,177 kJ·mol^(-1).Finally,distributed activation energy model(DAEM)analysis was performed,and the obtained parameters were successfully coupled into three-dimensional numerical simulation with some simplifications in the DAEM integration to reduce calculation cost,showing its potential applicability in biomass pyrolysis investigation.展开更多
在生物质高效利用的过程中,须要对纤维素与木质素进行有效分离,为了更深入地研究木质素及其提取剩余物,以松木为原料,对木质素及其提取后剩余物进行热解特性研究和热解动力学分析。结果表明,乙二醇木质素的热解过程为3个阶段:水分挥发...在生物质高效利用的过程中,须要对纤维素与木质素进行有效分离,为了更深入地研究木质素及其提取剩余物,以松木为原料,对木质素及其提取后剩余物进行热解特性研究和热解动力学分析。结果表明,乙二醇木质素的热解过程为3个阶段:水分挥发、支链断裂重组和芳环缩聚成炭;经Flynn-Wall-Ozawa(FWO)模型拟合得出的线性方程相关系数较高,因此FWO模型可应用于乙二醇木质素及其提取剩余物主要热解阶段的动力学分析。通过热解动力学分析得出,乙二醇木质素及其提取剩余物的平均表观活化能分别为221.81、193.13 k J/mol。展开更多
基金the financial support of the National Natural Science Foundation of China(22278432)National Key Research&Development Program of China(2022YFB3805602)Science Foundation of China University of Petroleum-Beijing(2462021BJRC001,2462021QNXZ007)。
文摘Utilizing calcium aluminate(CaAlO)as a catalyst in lignocellulosic biomass pyrolysis offers dual advantages of cost saving and mitigating environmental pollution from industrial waste.This study employs kinetic analysis to validate the catalytic effect of CaAlO on biomass pyrolysis.Thermalgravimetric analysis of walnut shell pyrolysis was conducted,incorporating CaAlO,CaO,and Al_(2)O_(3) additives to examine catalytic pyrolysis and gas release characteristics.The results reveal that CaAlO exhibits a catalytic effect similar to that of CaO and Al_(2)O_(3),suggesting its potential as an effective catalyst.Activation energies obtained without additive and with CaAlO,CaO,and Al_(2)O_(3) by Friedman method are 184,178,158,and 176 kJ·mol^(-1),while by Flynn-Wall-Ozawa(FWO)method are 186,179,160,177 kJ·mol^(-1).Finally,distributed activation energy model(DAEM)analysis was performed,and the obtained parameters were successfully coupled into three-dimensional numerical simulation with some simplifications in the DAEM integration to reduce calculation cost,showing its potential applicability in biomass pyrolysis investigation.
文摘在生物质高效利用的过程中,须要对纤维素与木质素进行有效分离,为了更深入地研究木质素及其提取剩余物,以松木为原料,对木质素及其提取后剩余物进行热解特性研究和热解动力学分析。结果表明,乙二醇木质素的热解过程为3个阶段:水分挥发、支链断裂重组和芳环缩聚成炭;经Flynn-Wall-Ozawa(FWO)模型拟合得出的线性方程相关系数较高,因此FWO模型可应用于乙二醇木质素及其提取剩余物主要热解阶段的动力学分析。通过热解动力学分析得出,乙二醇木质素及其提取剩余物的平均表观活化能分别为221.81、193.13 k J/mol。
