采用GC-MS分析玉米秸秆纤维素与亚/超临界乙醇液化产物,将产物划分酮类(KE)、酯类(ES)、醇类(AL)、液化残渣(RE)和其他(OT)五集总,初步探索反应网络,建立12条反应路径的5集总模型,运用遗传算法简化优化后得出计算结果和最佳条件。结果显...采用GC-MS分析玉米秸秆纤维素与亚/超临界乙醇液化产物,将产物划分酮类(KE)、酯类(ES)、醇类(AL)、液化残渣(RE)和其他(OT)五集总,初步探索反应网络,建立12条反应路径的5集总模型,运用遗传算法简化优化后得出计算结果和最佳条件。结果显示,反应级数n在0.1~1.2之间,指前因子A在1.23×10~7/h到1.78×10^(15)/h之间,活化能Ea在76.75~153.45 k J/mol。模拟结果与实验数据相吻合,证实该5集总模型是可靠的,用遗传算法计算动力学参数是可行的,为生物质转化为平台化合物提供基础数据。展开更多
Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the r...Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the residuals were tested by 1H NMR, FTIR and SEM techniques. The results indicated that under the same conditions, the oil yield from liquefaction of wheat straw in water/ethanol was higher than that in sub-critical water. The result also showed that under the investigated conditions, adding 1-butyl-3-methylimidazolium chloride([Bmim]Cl) could increase the total conversion and gas yield, while at the same time the yield of n-hexane insoluble fraction and the tetrahydrofuran soluble fraction was reduced. Moreover, the results also showed that upon adding [Bmim]Cl the contents of the aliphatic hydrogen and phenols in liquid oil also increased along with improved oil quality.展开更多
文摘采用GC-MS分析玉米秸秆纤维素与亚/超临界乙醇液化产物,将产物划分酮类(KE)、酯类(ES)、醇类(AL)、液化残渣(RE)和其他(OT)五集总,初步探索反应网络,建立12条反应路径的5集总模型,运用遗传算法简化优化后得出计算结果和最佳条件。结果显示,反应级数n在0.1~1.2之间,指前因子A在1.23×10~7/h到1.78×10^(15)/h之间,活化能Ea在76.75~153.45 k J/mol。模拟结果与实验数据相吻合,证实该5集总模型是可靠的,用遗传算法计算动力学参数是可行的,为生物质转化为平台化合物提供基础数据。
基金the Research Fund for the Doctoral Program of Higher Education for new teachers of China(20091404120002)the Shanxi Province Science Foundation for Youths of China(2011021008-1)the Soft Science Program of Shanxi Province(2011041015-01)
文摘Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the residuals were tested by 1H NMR, FTIR and SEM techniques. The results indicated that under the same conditions, the oil yield from liquefaction of wheat straw in water/ethanol was higher than that in sub-critical water. The result also showed that under the investigated conditions, adding 1-butyl-3-methylimidazolium chloride([Bmim]Cl) could increase the total conversion and gas yield, while at the same time the yield of n-hexane insoluble fraction and the tetrahydrofuran soluble fraction was reduced. Moreover, the results also showed that upon adding [Bmim]Cl the contents of the aliphatic hydrogen and phenols in liquid oil also increased along with improved oil quality.
