【摘要】 探索了等离子体介质阻挡放电甲苯加氢工艺的行为。反应产物的气相色谱分析结果表明甲基环己烷为主产物。单因素实验法考察不同因素对甲苯加氢反应行为的影响,初步推测等离子体环境下甲苯加氢反应包含三种机理:加成反应、取代反应、C-C键断裂反应。研究发现,通过增大放电功率和催化剂(Ni/SiO2)协同作用,可使甲基环己烷转化率趋于最佳值。在反应条件为:"一段式"催化剂装填方式,0.30 g催化剂固载于0.1 g玻璃纤维上,催化剂活性金属组分含量17%(wt);放电电压8.4 k V;电极直径50 mm;气体配比(VH2/VC7H8)31;停留时间21 s,其甲苯转化率可达78.4%,甲基环己烷选择性72.2%。更多还原

【Abstract】 The reaction of toluene with hydrogen by DBD plasma was studied. The products were collected and analyzed by gas chromatography. Methyl cyclohexenes was the major product identified. Three kinds of reaction mechanisms in the plasma environment were observed: addition reaction, substitution reaction and carbon-carbon bond broken. Various parameters of influencing toluene hydrogenation were investigated with single factor experiment. The methyl cyclohexane was optimized by increasing the power and using the effect of catalytic(Ni/Si O2) synergy. Under the optimal condition: the "one-stage" catalyst loading pattern with catalyst loading quantity 0.30 g, catalyst active metal content 17%(wt), discharge voltage 8.4 k V, electrode diameter 50 mm, the ratio of gas(VH2 / VC7H8) 31, and the residence time 21 s, the conversion rate of toluene can reach 78.4 % and the selective of methyl cyclohexane is 72.2%.更多还原