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Upgrading of Bio-Oil Aqueous Fraction by Dual-Stage Hydrotreating–Cocracking with Methanol
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-06-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b01505 Qinjie Cai 1 , Jia Xu 1 , Suping Zhang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-06-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b01505 Qinjie Cai 1 , Jia Xu 1 , Suping Zhang 1
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Upgrading of the bio-oil aqueous fraction (BAF) for liquid hydrocarbon production was studied in this work. Hydrotreating pretreatment and methanol cocracking were combined as a dual-stage hydrotreating–cocracking process to overcome the severe coking problem caused by the hydrogen-lacking property of BAF. The influences of hydrotreating temperature, reaction pressure, and BAF/methanol ratio in feedstock were investigated. It was found that the hydrogenation efficiencies of phenols in BAF were elevated with increases in hydrotreating temperature and reaction pressure, which were important for maintaining cracking catalyst activity. However, a too high hydrotreating temperature significantly enhanced the gasification reaction and led to reduction in the final liquid hydrocarbon yield. Meanwhile, an excessively high BAF/methanol ratio obviously accelerated the deactivation of the cracking catalyst. The comparison of different cracking processes showed that dual-stage hydrotreating–cocracking was the most superior in stable liquid hydrocarbon generation. Finally, the reaction mechanism was proposed based on experimental results.
中文翻译：
双级加氢裂化-甲醇共裂解法提高生物油级分的效率
在这项工作中，研究了用于生产液态烃的生物油水性馏分（BAF）的升级。加氢处理预处理和甲醇共裂化结合在一起进行了双阶段加氢裂化-裂化工艺，以克服由BAF缺乏氢的特性引起的严重的焦化问题。研究了加氢处理温度，反应压力和原料中BAF /甲醇比的影响。发现随着加氢处理温度和反应压力的增加，BAF中苯酚的氢化效率提高，这对于维持裂化催化剂活性是重要的。然而，过高的加氢处理温度显着增强了气化反应并导致最终液态烃产率的降低。同时，过高的BAF /甲醇比显然会加速裂化催化剂的失活。对不同裂化过程的比较表明，在稳定的液态烃生成中，双级加氢处理-裂化是最优异的。最后根据实验结果提出了反应机理。
更新日期：2017-06-21
中文翻译：
双级加氢裂化-甲醇共裂解法提高生物油级分的效率
在这项工作中，研究了用于生产液态烃的生物油水性馏分（BAF）的升级。加氢处理预处理和甲醇共裂化结合在一起进行了双阶段加氢裂化-裂化工艺，以克服由BAF缺乏氢的特性引起的严重的焦化问题。研究了加氢处理温度，反应压力和原料中BAF /甲醇比的影响。发现随着加氢处理温度和反应压力的增加，BAF中苯酚的氢化效率提高，这对于维持裂化催化剂活性是重要的。然而，过高的加氢处理温度显着增强了气化反应并导致最终液态烃产率的降低。同时，过高的BAF /甲醇比显然会加速裂化催化剂的失活。对不同裂化过程的比较表明，在稳定的液态烃生成中，双级加氢处理-裂化是最优异的。最后根据实验结果提出了反应机理。
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