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Impact of variables on the naphthalene hydrogenation for the tetralin formation towards BTX production

机译:变量对萘萘氢化对BTX生产的影响

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To achieve high naphthalene conversion and selectivity to tetralin as a first step for BTX production, experiments were carried out in a bench-scale setup processing four model mixtures with a commercial CoMo/Al2O3 catalyst at 250 degrees C-375 degrees C, 1.96-7.84 MPa, and 0.7-1.4 h(-1). Model mixtures were prepared by dissolving in n-hexadecane: naphthalene (10 wt%), dibenzothiophene (1.5 wt%) and carbazole (0.05 wt%). Without dibenzothiophene and carbazole, naphthalene conversion and selectivity to tetralin reached 95.6 and 97.2wt%, respectively at 250 degrees C, 1.96 MPa and 1.2 h(-1). With dibenzothiophene and carbazole, naphthalene conversion dropped to 38.3 wt% (selectivity to tetralin = 99.6 wt%) at the same experimental conditions. Temperature and pressure were increased to 300 degrees C and 2.94 MPa to enhance naphthalene conversion (97.4 wt%); (selectivity to tetralin = 87.0 wt%). HDS and HDN were complete yet accompanied by a loss in the catalyst activity due to deactivation by coke. [Received: December 11, 2017; Accepted: May 9, 2018]
机译:为了实现高萘转化和对转甲蛋白的选择性作为BTX生产的第一步,在台级设置中进行实验,处理四种模型混合物,其中250℃-375摄氏度,1.96-7.84 MPA和0.7-1.4小时(-1)。通过溶解在正己烷烷中制备模型混合物:萘(10wt%),二苯并噻吩(1.5wt%)和咔唑(0.05wt%)。在没有二苯并噻吩和咔唑的情况下,萘转化和对四萘的选择性分别在250℃,1.96MPa和1.2小时(-1)时分别达到95.6和97.2wt%。用二苯并噻吩和咔唑,在相同的实验条件下,萘转化率下降至38.3wt%(对等特拉仑= 99.6wt%的选择性)。温度和压力增加至300℃和2.94MPa,以增强萘转化率(97.4wt%); (对等rallin的选择性= 87.0wt%)。 HDS和HDN的完整尚未伴随着焦炭失活的催化剂活动中的损失。 [收到:2017年12月11日;接受:2018年5月9日]

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