水溶性生物油丙酮萃取物的光催化氧化反应

Photocatalytic Oxidation of the Extracts in Acetone from Water-soluble Bio-oil

在超声辐射下用等体积的水萃取了稻壳生物油,离心分离后得到水溶物,并对水溶物依次用石油醚、CS2、CCl4、氯仿和丙酮进行萃取,分析发现得到的丙酮萃取物(E0)萃取率很高,但在气相色谱/质谱联用仪(GC/MS)上不显示化合物信息。为提高E0的利用效率,以TiO2作为催化剂,考察了温和条件下该生物油水溶组分丙酮萃取物的光催化氧化反应。通过活性炭吸附从反应混合物中分离了有机成分并依次用石油醚和丙酮萃取,得到萃取物1和2(E1和E2),继而用GC/MS分析了E1和E2。结果表明,在E1和E2中检测到大量的酚类、酸类、酮类和酯类等含氧化合物,且多为羟基和烷氧基取代物,这对生物油的高效利用具有重要意义。

Under the condition of ultrasonic, bio - oil from rice hull was extracted by water with the same vol- ume. The water - soluble bio - oil from rice hull was extracted with petroleum ether, carbon disulfide, tetrachloride carbon, trichloromethane and acetone. The extracts in acetone from water -soluble bio -oil was reacted with the oxi- dant of H2 02 and the catalyzer of TiO2, under photoeatalytic oxidation. The products, adsorbed by active carbon, were extracted by petroleum ether and acetone, respectly. These extracts 1 and 2 （E1 to E2 ） were analyzed by GC/MS. The result shows us significant differences between the substrates and the products. The results show most of organic compounds detected in oxidated bio -oil was phenolic compounds, ketone compounds, ester compounds and organic acids. It is important to the efficient utilization of bio oil.