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| 废油脂生物柴油的脱硫处理研究 |
| Desulfurization of biodiesel prepared from waste oil |
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| DOI：10.12166/j.zgyz.1003-7969/2019.11.011 |
| 中文关键词: 生物柴油 地沟油 脱硫 吸附 双氧水洗涤 负压蒸馏 |
| 英文关键词:biodiesel swill-cooked dirty oil desulfurization adsorption hydrogen peroxide washing negative |
| 基金项目:国家重点研发计划（2017YFD0601003）；国家自然科学基金项目（51606201） |
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| 中文摘要: |
| 液体燃料的硫排放是环境污染的一个重要来源。废油脂制得的生物柴油硫含量往往超出国家标准。在相同条件下，采用活性炭、阴离子交换树脂、活性白土3种吸附剂对地沟油生物柴油进行脱硫试验。结果表明：活性炭脱硫效果较好，在活性炭用量为地沟油生物柴油质量的3%、吸附温度65 ℃、吸附时间30 min条件下，生物柴油脱硫率为11.7%。试验发现地沟油生物柴油采用双氧水洗涤后再进行二次负压蒸馏能达到显著的脱硫效果，生物柴油脱硫率达77.8%；高含硫地沟油、棕榈酸化油制备的生物柴油最佳的脱硫工艺为原料油经双氧水洗涤、生物柴油粗品二次负压蒸馏，生物柴油成品脱硫率分别达到95.6%、93.3%，硫含量分别为6.7、8.9 mg/kg，满足国Ⅵ柴油排放标准（GB 19147—2016）的硫含量小于等于10 mg/kg要求。 |
| 英文摘要: |
| ：Sulfur emission from liquid fuels is one of the major sources of environmental pollution．The sulfur content of biodiesel produced from waste oil often exceeds the national standard．The desulfurization experiment was carried out by three adsorbents (activated carbon，anion exchange resin and activated clay) under the same conditions. The results showed that the desulfurization effect of activated carbon was better. The optimal desulphurization conditions of activated carbon were obtained as follows: dosage of activated carbon 3% of the swill-cooked dirty oil biodiesel, adsorption temperature 65 ℃ and adsorption time 30 min. Under these conditions, the desulfurization rate was 11.7%. A remarkable desulfurization effect could be achieved when the swill-cooked dirty oil biodiesel was washed with hydrogen peroxide followed by secondary negative pressure distillation with the desulfurization rate 77.8%. The optimal desulfurization process of the biodiesel prepared from the swill-cooked dirty oil and palm acidic oil was that the raw oil was washed with hydrogen peroride, and the crude biodiesel produced was treated by secondary negative pressure distillation. The final desulphurization rate of biodiesel products reached 95.6% and 933% respectively, and the sulfur contents were 6.7, 8.9 mg/kg, which met the latest national VI diesel emission standard （GB 19147—2016） with sulfur content less than 10 mg/kg． |
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