Ti-MCM-41/次氯酸钠催化氧化脱除模型油中苯并噻吩的研究
收稿日期: 2015-11-27
修回日期: 2015-12-23
网络出版日期: 2016-02-28
基金资助
国家自然科学基金青年项目（21403038）；
广东省自然科学基金（2015A030313892）；
广东省大学生科技创新培育专项资金项目 “攀登计划”（pdjh2015b0355）；
茂名市科技计划项目（2014084）
Benzothiophene Catalytic Oxidation Removal with Ti-MCM-41/Sodium Hypochlorite in Model Oil
Received date: 2015-11-27
Revised date: 2015-12-23
Online published: 2016-02-28
采用水热法合成了介孔Ti-MCM-41分子筛，并通过X射线粉末衍射（XRD），傅立叶变换红外光谱（FT-IR），紫外−可见光漫反射光谱（DR UV-vis）以及BET氮气吸附−脱附等温线方法对合成的样品进行表征。以正庚烷−苯并噻吩模拟油，以Ti-MCM-41/NaClO为催化氧化体系，考察其催化氧化反应条件及动力学参数。结果表明当反应温度为308 K，反应时间为40 min，NaClO用量为3 mL，Ti-MCM-41用量为0.05 g，萃取剂乙腈用量为10 mL，脱硫率达68%；动力学分析表明苯并噻吩的氧化反应为一级反应，表观活化能Ea为56.55 kJ/mol。结果表明利用Ti-MCM-41/NaClO体系催化氧化脱硫是行之有效的。
余思钰 , 彭 晶 , 王寒露 , 莫桂娣 , 杨小勇 . Ti-MCM-41/次氯酸钠催化氧化脱除模型油中苯并噻吩的研究[J]. 新能源进展, 2016 , 4(1) : 62 -67 . DOI: 10.3969/j.issn.2095-560X.2016.01.010
Mesoporous molecular sieve Ti-MCM-41 was synthesized by hydrothermal method and characterized by using X ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflectance spectroscopy (UV-vis DR) and BET nitrogen adsorption desorption isotherm method. The catalytic oxidation reaction conditions and the kinetic parameters were investigated with Ti-MCM-41/NaClO as catalytic oxidant in the model oil consisting of n-heptane and benzothiophene. The results suggested that the sulfur removal rate was 68% under reaction temperature of 308 K, reaction time of 40 min, NaClO dosage of 3 mL, Ti-MCM-41 dosage of 0.05 g and extracting agent CH3CN dosage of 10 mL. The kinetic analysis indicated that showed benzothiophene oxidation reaction was a first-order reaction and the apparent activation energy (Ea) was 56.55 kJ/mol. The results showed that the Ti-MCM-41/NaClO wais effective in catalytic oxidation desulfurization.
Key words： Ti-MCM-41; catalytic oxidation; sodium hypochlorite; desulfurization; kinetics
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