污泥含碳有机官能团分布及其模型化合物构建

污泥有机结构体系中碳属于活泼元素，化学活性较强，能源转化处理过程时易发生热化学反应，对污泥能源转化产物的化学特征及生成规律有重大影响.本研究采用傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）开展了污泥含碳官能团分布特征分析，污泥中的主要含碳官能团为烯基（C-C）、苯环（π-π^*）、醚（C-O-C）、羧基（-COOH）.基于污泥中主要含碳官能团分布和污水中常见有机物组成，构建了污泥典型含碳官能团模型化合物：间二甲苯（π-π^*），四氢呋喃（C-O-C），乙酸（-COOH）和环戊烯（C=C）.此外采用热解仪与气相色谱/质谱联用技术（Py-GC/MS）对比分析了不同温度下污泥与含碳模型化合物的热解规律，验证了所构建的含碳模型化合物基本合理可靠.

Characterization of carbon-containing organic functional groups in sludge and construction of its model compounds

Carbon contained in the organic structure of sludge is an active element with strong chemical activity. Its thermochemical reaction occurs easily during energy conversion, which has a significant impact on the chemical characteristics and formation of the resulting products from sludge energy conversion. Firstly, the distribution of carbon-containing functional groups on the surface of sludge were analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The main carbon containing functional groups in sludge include Enyl (C-C), benzene ring (pi-pi^*), ether (C-O-C), carboxyl (-COOH). Based on the obtained results regarding organic carbon and the composition of common organic compounds in sludge, a few typical carbon functional group model compounds of sludge were then constructed:M-xylene (pi-pi^*), tetrahydrofuran (C-O-C), acetic acid (-COOH) and cyclopentene (C=C). Finally, pyrolysis apparatus and gas chromatography/mass spectrometry (Py-GC/MS) was combined to compare the pyrolysis characteristics of sludge and carbon-containing model compounds at different temperatures. It was proved that the constructed carbon-containing model compounds were basically reasonable and reliable.