Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Bioresour Technol. 2015 Apr;182:160-168. doi: 10.1016/j.biortech.2015.01.124. Epub 2015 Feb 4.
Hydrothermal liquefaction can be used to convert rice straw into an aqueous phase product that contains valuable phenolic compounds. In experiments, commercial adsorption resin XAD-4 was modified by a benzene ring - α,α'-dichloro-p-xylene (DCX) - in order to separate the phenolic compounds from the aqueous phase product; and, the optimal conditions for separation were explored. The results showed that, after modification of the resin, its adsorption capacity improved by 50%, due to increases in surface area, pore volume and micropore volume. The selectivity of the resin increased when the benzene ring was introduced as the ring formed hydrogen bonds with the compounds. The optimal conditions for separation were desorption agent of 40%, 45% and 55% ethanol solution, a flow rate of 2.5-5 mL/min, and a ratio of the sample volume to the column volume was 1:1. The total content of phenolic compounds in aqueous solution increased from 18% to 78% after separation.
水热液化可以将稻草转化为含有有价值酚类化合物的水相产物。在实验中，通过苯环-α,α'-二氯对二甲苯（DCX）对商用吸附树脂 XAD-4 进行改性，以从水相产物中分离酚类化合物，并探索了分离的最佳条件。结果表明，树脂改性后，由于表面积、孔体积和微孔体积的增加，其吸附容量提高了 50%。苯环的引入增加了树脂的选择性，因为苯环与化合物形成氢键。分离的最佳条件为解吸剂为 40%、45%和 55%的乙醇溶液，流速为 2.5-5mL/min，样品体积与柱体积比为 1:1。分离后，水溶液中酚类化合物的总含量从 18%增加到 78%。
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