Liquefaction of metal-contaminated giant reed biomass in acidified ethylene glycol system: Batch experiments |
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作者姓名: | 郭朝晖 刘亚男 王凤永 肖细元 |
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基金项目: | Project(41271330) supported by the National Natural Science Foundation of China; Project(2012BAC09B04) supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China; Project(2012FJ1010) supported by the Science and Technology Major Program of Hunan Province, China |
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摘 要: | Giant reed is a suitable pioneer plant for metal-contaminated soil phytoremediation,however,it is imperative to dispose the metal-contaminated biomass after harvesting.The liquefaction of metal-contaminated giant reed biomass in ethylene glycol system with sulfuric acid as catalyst for the precursors of polyurethane compounds was studied.The results show that giant reed biomass from metal-contaminated soil is potentially liquefied and significantly affected by solvent/solid ratio,liquefaction temperature and liquefaction time (P〈0.05).The liquefaction rate of biomass in acidified ethylene glycol system can reach 85.2% with optimized conditions of 60 min,170 ℃,3% sulfuric acid and solvent/biomass ratio of 5:1.The hydroxyl value of liquefied products is of 481 mg KOH/g while reactive hydroxyl groups of them are abundant,which is promised as potential precursors for polyurethane compounds.The solvent liquefaction is a potential method to dispose the metal-contaminated biomass,however,the containing-metal liquefied products should be studied deeply in order to get the suitable precursors in future.
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关 键 词: | 液化时间 金属污染 生物质 乙二醇 芦竹 系统 酸化 实验 |
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