园林废弃物与餐厨厌氧沼渣混合热解特性及动力学分析

为了探究园林废弃物和餐厨厌氧沼渣的热解特性以及2者混合热解的交互作用。采用热重分析法对餐厨厌氧沼渣、园林废弃物及其不同比例的混合样品热解特性进行了分析，并研究了混合比例和升温速率对热解过程的影响。结果表明，园林废弃物与沼渣单独热解时，园林废弃物热解反应活性高且能耗低，热解终温为400 ℃左右；沼渣热解反应活性低且能耗高，热解终温为600 ℃左右。混合热解实验中，随着园林废弃物添加比例升高，样品热解残余率不断下降，综合热解指数不断增大，园林废弃物与沼渣混合热解适宜的添加比例为50%，热解终温为600 ℃左右。采用Coats-Redfern积分法对园林废弃物、沼渣及混合样品进行动力学分析，园林废弃物和餐厨厌氧沼渣反应活化能分别为12.08和1.79 kJ·mol⁻¹，混合样品实际活化能均略高于理论值。这说明，2者混合热解过程中存在一定抑制作用，但对热解过程影响不大。本研究结果可为园林废弃物与餐厨厌氧沼渣混合热解处理提供参考。

Pyrolysis characteristics and kinetic analysis of co-pyrolysis of garden waste and kitchen anaerobic biogas residue

To explore the pyrolysis characteristics of garden waste and kitchen anaerobic biogas residue and the interaction of their mixed pyrolysis. Thermogravimetric analysis was used to analyze the pyrolysis characteristics of kitchen anaerobic biogas residue, garden waste and the mixed samples in different proportions, and the effects of mixing proportion and heating rates on the pyrolysis process were studied. The results showed as follows, when the garden waste and biogas residue were pyrolyzed separately, the pyrolysis reaction activity of garden waste was high and the energy consumption was low, and the final pyrolysis temperature was about 400 ℃. While biogas slag had low pyrolysis activity and high energy consumption, and the final pyrolysis temperature was around 600 ℃. In the mixed pyrolysis experiment, with the increase of the addition proportion of garden waste, the sample pyrolysis residual rate decreased and the comprehensive pyrolysis index increased. The appropriate proportion ratio of garden waste and biogas residue was 50%, and the final pyrolysis temperature was about 600 ℃. Kinetic analysis of garden waste, biogas residue and mixed samples was performed by the Coats-Redfern integral method. The activation energies of garden waste and kitchen anaerobic biogas residue were 12.08 kJ·mol−1 and 1.79 kJ·mol−1, respectively. The actual activation energies of the mixed samples were slightly higher than the theoretical values, indicating that the two have a certain inhibitory effect in the mixed pyrolysis process, while the influence was not significant. The research results can provide a reference for the mixed pyrolysis treatment of garden waste and kitchen anaerobic biogas residue.