为解析挥发分-焦炭交互反应对生物质焦炭官能团结构的影响,利用一维固定床/流化床反应器及快速热裂解仪,采用傅里叶红外光谱仪从定性与半定量角度分析交互反应对生物质焦炭官能团结构的影响.结果表明:相比于温度的作用,交互反应对生物质焦炭官能团结构的影响更为剧烈;交互反应使焦炭中的各个特征官能团对应的特征峰强度有所减弱,峰的种类也有所减少;交互反应对焦炭烷基侧链有破坏作用,并加快了其从芳香环上的脱落;在无交互反应下,焦炭有机质的成熟度随着温度的上升而增高;在交互反应下,较低的温度时该规律成立,而较高温度时该参数逐渐下降;在高温下,挥发分裂解产生的自由基会引起芳香环的缩合,导致Car含量增多.%To study the effect of volatile-char interaction on biochar functional groups, the one-stage fluidized bed/fixed bed reactor and Py were used in the experiment, and the biochar structure was analyzed by Fourier transform infrared spectrometer in the qualitative and semi-quantitative aspects. The results show that with the increase of temperature, the influence of interaction on biochar structure is more intense. The characteristic peaks of biochar functional groups are reduced and the species of peaks are reduced due to the volatile-char interaction which has a destructive effect on the alkyl side chain and accelerates its detachment from aromatic ring. Without the volatile-char interaction or with the interaction but at low temperature, the maturity of organic matter of biochar increases with the increasing of temperature. However at high temperature, the parameters decrease and the free radicals generated by the volatile splitting can cause the condensation of aromatic ring, which leads to the increase of Car content.
展开▼
