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Synthesis of novel catalysts for hydrodeoxygenation of bio-oil: guaiacol as a model component

机译:生物油加氢脱氧新催化剂的合成:Guaiacol作为模型组分

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In this work, NiMo/Support catalysts have been prepared by impregnation technique and evaluated for hydrodeoxygneation (HDO) reaction of guaiacol (GUA) aiming at the identification of active catalysts. Among various catalysts, NiMo/TiO_2 was chosen to understand the influence of reaction parameters, such as temperature, reaction time, H_2 pressure, and quantity of the catalyst. The influence of the metal components on guaiacol conversion is determined by comparing mono (Ni and Mo) metals deposited TiO_2. These results signify the alloying nature of metal components. GCMS results showed that phenol is a major component in all the conditions. As there is an increase in the temperature (200, 250, 300, 350°C), reaction time (1, 5, 8, 24 h), H_2/guaiacol molar feed ratio (0, 1:2, 1:1, and 2:1), and catalyst amount (0, 25, 50, 100 mg), the conversion has increased significantly while maintaining the high selectivity to HDO products without ring opening reactions. Under optimized conditions (350°C and 2:1 of H_2:guaiacol ratio), 98% guaiacol is converted on NiMo/TiO_2 resulting phenol, poly methyl substituted phenols, and traces of cyclohexanone and benzene. It is remarkable that a low amount of catechol dimethyl ether and no indication of catechol and creosol were detected.
机译:在这项工作中,的NiMo /支持催化剂已经制备浸渍技术,并评价愈创木酚针对活性催化剂的识别hydrodeoxygneation(HDO)反应(GUA)。在各种催化剂中,的NiMo /的TiO_2被选为了解反应参数,如温度,反应时间,压力H_2,和数量的催化剂的影响。愈创木酚上转换的金属成分的影响通过比较沉积的TiO_2单(Ni和Mo)的金属来确定。这些结果表明金属成分的合金的性质。 GCMS结果表明,苯酚是在所有条件下的主要组成部分。由于有增加的温度(200,250,300,350℃),反应时间(1,5,8,24小时),H_2 /愈创木酚的摩尔进料比(0,1:2,1:1,和2:1),和催化剂量(0,25,50,100毫克),转换已显著,同时保持高选择性HDO产品无开环反应增加。在优化条件下(350℃和2:H_2的1:愈创木酚的比例),98%愈创木酚转化上的NiMo /所得的TiO_2苯酚,聚甲基取代的苯酚和环己酮和苯的痕迹。值得注意的是,检测到儿茶酚二甲醚的低量和无儿茶酚和甲氧甲酚的指示。

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