Abstract

The use of nickel-based catalysts in the hydrodeoxygenation of vegetable oils is an alternative to employing systems based on noble metals and sulfided hydrotreatment catalysts. Modifying nickel hydrodeoxygenation catalysts with molybdenum and copper increases the yield of target reaction products and the resistance of catalytic systems to the effect of an aggressive medium. The aim of this work is to determine the dependence between the temperature, contact time, and activity of modified nickel-containing catalyst in the hydrodeoxygenation of esters of fatty carboxylic acids and determine the effective kinetic parameters for the consumption of the reagent. The experiments are performed in a continuous flow reactor with a fixed catalyst bed at \({{P}_{{{{{\text{H}}}_{2}}}}}\) = 0.25 MPa, temperatures of 270, 285, 300, and 315°C, and a contact time varying from 600 to 1800 s. The results show the selectivity toward the main reaction products (nonane and decane) remains the same when either the temperature of experiment or the contact time are varied. Experimental data are used to determine the effective rate constant and energy of activation of ester consumption.

中文翻译：

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Ni-Cu-Mo / Al 2 O 3催化剂上癸酸乙酯的加氢脱氧动力学

摘要

在植物油的加氢脱氧中使用镍基催化剂是采用基于贵金属和硫化加氢处理催化剂的系统的替代方法。用钼和铜改性镍加氢脱氧催化剂可提高目标反应产物的收率和催化体系对侵蚀性介质的抵抗力。这项工作的目的是确定脂肪羧酸酯加氢脱氧中温度，接触时间和改性含镍催化剂活性之间的关系，并确定试剂消耗的有效动力学参数。实验在\（{{P} _ {{{{\ text {H}}} __ {2}}}}} \）上在固定催化剂床的连续流反应器中进行= 0.25 MPa，温度270、285、300和315°C，接触时间从600到1800 s不等。结果表明，当实验温度或接触时间变化时，对主要反应产物（壬烷和癸烷）的选择性均保持不变。实验数据用于确定有效的速率常数和激活酯消耗的能量。