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Hydrocracking Straight-Run Diesel into High-Value Chemical Materials: The Effect of Acidity and Kinetic Study
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-14 , DOI: 10.1021/acs.iecr.2c00262 Zhengkai Cao 1, 2 , Xia Zhang 2 , Jinlin Mei 1 , Rong Guo 2 , Ziming Wu 2 , Shuandi Hou 2 , Shaozhong Peng 2 , Siqiang Fan 2 , Chong Peng 2 , Aijun Duan 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-14 , DOI: 10.1021/acs.iecr.2c00262 Zhengkai Cao 1, 2 , Xia Zhang 2 , Jinlin Mei 1 , Rong Guo 2 , Ziming Wu 2 , Shuandi Hou 2 , Shaozhong Peng 2 , Siqiang Fan 2 , Chong Peng 2 , Aijun Duan 1
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A novel process of hydrocracking straight-run diesel was proposed for producing more chemical materials. The influences of acidities and hydrogenation abilities for serial bifunctional catalysts on hydrocracking behaviors for diesel were also investigated. The results showed that the acidities of catalysts increased with additional amounts of Y zeolite, and the hydrogenation abilities enhanced with the amounts of Al2O3 due to its large pore size and pore volume, which could provide a preferable support colony for active metals to disperse. The X-ray photoelectron spectra (XPS) and high-resolution transmission electron microscopy (HRTEM) results demonstrated that the NiW/AY-15 catalyst had the highest proportion and dispersion degree of MoS2 active phases. Meanwhile, the evaluation results of straight-run diesel hydrocracking exhibited that the light naphtha, jet fuel, and upgraded diesel with large amounts of paraffins could be directly applied as feedstock of the steam-cracking unit for producing olefins. The heavy naphtha with high amounts of aromatics and cyclanes could also serve as high-quality feedstock for the catalytic reforming unit. Therefore, the quantities of chemical materials were maximized through hydrocracking straight-run diesel. Moreover, the amounts of paraffins in the hydrocracking product of diesel over the NiW/AY-15 catalyst were the highest among all of the catalysts due to its best hydrogenation performance. Finally, the kinetic model and reaction characteristics of straight-run diesel hydrocracking were initially proposed on the basis of the experimental results. The kinetic analysis proved that hydrocracking of straight-run diesel followed the pseudo-first-order reaction.
中文翻译：
将直馏柴油加氢裂化成高价值化学材料：酸度和动力学研究的影响
为生产更多化工原料，提出了一种直馏柴油加氢裂化新工艺。还研究了系列双功能催化剂的酸度和加氢能力对柴油加氢裂化行为的影响。结果表明，催化剂的酸性随着Y沸石的添加量增加而增加，而由于Al 2 O 3的孔尺寸和孔体积大，催化剂的加氢能力随着添加量的增加而增强，这可以为活性金属提供优选的载体团。分散。X射线光电子能谱（XPS）和高分辨率透射电子显微镜（HRTEM）结果表明，NiW/AY-15催化剂具有最高的MoS 2比例和分散度活跃阶段。同时，直馏柴油加氢裂化评价结果表明，轻石脑油、航煤和含大量链烷烃的改质柴油可直接作为蒸汽裂化装置生产烯烃的原料。含有大量芳烃和环烷烃的重质石脑油也可以作为催化重整装置的优质原料。因此，通过加氢裂化直馏柴油使化学材料的数量最大化。此外，NiW/AY-15催化剂上的柴油加氢裂化产物中链烷烃的含量是所有催化剂中最高的，因为它的加氢性能最好。最后，在实验结果的基础上，初步提出了直馏柴油加氢裂化的动力学模型和反应特性。动力学分析证明直馏柴油的加氢裂化遵循准一级反应。
更新日期：2022-06-14
中文翻译：
将直馏柴油加氢裂化成高价值化学材料：酸度和动力学研究的影响
为生产更多化工原料，提出了一种直馏柴油加氢裂化新工艺。还研究了系列双功能催化剂的酸度和加氢能力对柴油加氢裂化行为的影响。结果表明，催化剂的酸性随着Y沸石的添加量增加而增加，而由于Al 2 O 3的孔尺寸和孔体积大，催化剂的加氢能力随着添加量的增加而增强，这可以为活性金属提供优选的载体团。分散。X射线光电子能谱（XPS）和高分辨率透射电子显微镜（HRTEM）结果表明，NiW/AY-15催化剂具有最高的MoS 2比例和分散度活跃阶段。同时，直馏柴油加氢裂化评价结果表明，轻石脑油、航煤和含大量链烷烃的改质柴油可直接作为蒸汽裂化装置生产烯烃的原料。含有大量芳烃和环烷烃的重质石脑油也可以作为催化重整装置的优质原料。因此，通过加氢裂化直馏柴油使化学材料的数量最大化。此外，NiW/AY-15催化剂上的柴油加氢裂化产物中链烷烃的含量是所有催化剂中最高的，因为它的加氢性能最好。最后，在实验结果的基础上，初步提出了直馏柴油加氢裂化的动力学模型和反应特性。动力学分析证明直馏柴油的加氢裂化遵循准一级反应。
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