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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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不同蒸馏压力下的生物油分子蒸馏分离特性研究
, PP. 177-182
Keywords: 生物油,分子蒸馏,分离特性,蒸馏压力
Abstract:
？采用分子蒸馏分离技术对热敏性生物油在不同蒸馏压力下的分离特性进行了研究。经过分子蒸馏分离后,生物油被分离为蒸出馏分油与残留馏分油,蒸出馏分油的得率随着压力的下降而显著增大,在700pa时达到了56.50%(质量分数)。在馏分油的物理性质方面,蒸出馏分油富集了生物油内的大部分水分,残留馏分油内水分得到了较好的脱除,其中,700pa下残留馏分油的水分含量降至4.20%(质量分数)。结合生物油及馏分油的gc-ms分析结果,对乙酸、苯酚、糠醛以及左旋葡聚糖等生物油内典型化合物在不同蒸馏压力下的分布特性进行了研究,获得了相应化合物在分子蒸馏过程中的富集规律。结合分离因子评估模型对生物油内14种代表化合物的富集特性进行了量化评价。
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