磷钼酸季铵盐催化柴油氧化脱硫研究 |
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引用本文: | 邱江华,王光辉,曾丹林,卢本才.磷钼酸季铵盐催化柴油氧化脱硫研究[J].武汉冶金科技大学学报,2009(4):427-430. |
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作者姓名: | 邱江华 王光辉 曾丹林 卢本才 |
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作者单位: | 武汉科技大学煤转化与新型炭材料省级重点实验室,湖北武汉430081 |
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基金项目: | 高等学校博士学科点专项科研基金资助项目(200804880003);湖北省自然科学基金资助项目(2008CDB376,2008CDB025). |
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摘 要: | 以十八烷基三甲基磷钼酸铵作催化剂、H2O2作氧化剂,对模型油和直馏柴油进行了氧化脱硫研究。结果表明,相同反应条件下,以磷钼酸季铵盐作催化荆时,二苯并噻吩(DBT)和苯并噻吩(BT)的脱除率比磷钼酸作催化剂分别提高了5.3倍和2.4倍;在70℃下反应2.5h,DBT、BT的脱除率分别达到100%和40.5%;动力学研究表明,DBT、BT的催化氧化反应皆符合表观一级动力学规律,其活化能分别为22.5kJ/mol和62.4kJ/mol;各反应条件对直馏柴油脱硫率的影响大小顺序为:催化剂用量〉反应时间〉氧化剂用量〉反应温度;在m(催化剂)/m(柴油)=1.8%、V(H2O2)/V(柴油)-2.5%、反应温度70℃、反应时间3h条件下,柴油的脱硫率达88.7%,收得率不低于99%。
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关 键 词: | 磷钼酸 季铵盐 柴油 氧化脱硫 |
Catalytic oxidative desulfurization of diesel fuel by quaternary ammonium phosphomolybdate |
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Authors: | Qiu Jianghua Wang Guanghui Zeng Danlin Lu Bencai |
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Affiliation: | (Hubei Coal Conversion and New Carbon Materials Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China) |
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Abstract: | The oxidative desulfurization of model oil and straight-run diesel catalyzed by octadecyl trimethyl ammonium phosphomolybdate was studied with the aqueous solution of H2O2 as the oxidant. It is shown that under the same reaction conditions, the conversion rates of dibenzothiophene (DBT) and benzothiophene (BT) are 5.3 times and 2.4 times higher catalyzed by quaternary ammonium phos- phomolybdate than by phosphomolybdic acid, respectively. The conversion rates of DBT and BT can be up to 100% and 40.5% under 70℃ and 2.5 h, respectively. Both the oxidative reactions of DBT and BT are in conformity with first order kinetics, and the apparent activation energies are 22.5 KJ/ tool and 62.4 KJ/mol, respectively. The influential factors for desulfurization of straight-run diesel are catalyst dosage〉reaction time,hydrogen peroxide dosage〉reaction temperature. Under the condition of m(catalyst)/m(diesel) 1.8%,v(H2O2)/v(diesel) 2.5%,70℃ and 3 h, the desulfurization rate of diesel is 88.7% with the recovery rate no less than 99%. |
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Keywords: | phosphomolybdic acid quaternary ammonium salt diesel oxidative desulfurization |
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