Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, PR China.
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, PR China.
Waste Manag. 2015 Dec;46:247-56. doi: 10.1016/j.wasman.2015.08.025. Epub 2015 Aug 28.
The pyrolysis and gasification of typical components of solid waste, cellulose, hemicellulose, lignin, pectin, starch, polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC) and poly(ethylene terephthalate) (PET) were performed and compared in a macro thermogravimetric analyzer (macro-TGA). Three model biomasses, poplar stem, orange peel and Chinese cabbage, were applied to pyrolysis and gasification simulation by their components based on TG curves. Compared to those from TGA, peaks temperature of the differential thermogravimetric (DTG) curves of each samples pyrolysis on macro-TGA delayed 30-55°C due to heat transferring effect. CO2 promoted the thermal decomposition of hemicellulose, lignin, starch, pectin and model biomasses significantly by Boudouard reaction, and enhanced slightly the decomposition of PET. The activation energy (AE) of biomass components pyrolysis on macro-TGA was 167-197 kJ/mol, while that of plastic samples was 185-235 kJ/mol. The activation energy of 351-377 kJ/mol was corresponding to the Boudouard reaction in CO2 gasification. All overlap ratios in pseudo-components simulation were higher than 0.98 to indicate that pseudo-components model could be applied to both pyrolysis and CO2 gasification, and the mass fractions of components derived from pyrolysis and gasification were slightly different but not brought in obvious difference in simulating curves when they were applied across.
采用热重分析仪（macro-TGA）对固体废弃物典型组分纤维素、半纤维素、木质素、果胶、淀粉、聚乙烯（PE）、聚苯乙烯（PS）、聚氯乙烯（PVC）和聚对苯二甲酸乙二醇酯（PET）进行了热解和气化实验，并进行了比较。通过各组分的 TG 曲线，应用三种模型生物质（杨木、桔皮和大白菜）进行热解和气化模拟。与 TGA 相比，由于热传递效应，各样品在 macro-TGA 上的差热失重（DTG）曲线的峰温延迟了 30-55°C。CO2 通过 Boudouard 反应显著促进了半纤维素、木质素、淀粉、果胶和模型生物质的热分解，对 PET 的分解略有促进。生物质组分在 macro-TGA 上的热解活化能（AE）为 167-197 kJ/mol，而塑料样品的活化能为 185-235 kJ/mol。351-377 kJ/mol 的活化能对应于 CO2 气化中的 Boudouard 反应。拟组分模拟中的所有重叠比均高于 0.98，表明拟组分模型可应用于热解和 CO2 气化，当应用于跨时，热解和气化所得组分的质量分数略有不同，但不会在模拟曲线中带来明显差异。
