CAJ | 학술논문

从分子水平研究了催化裂化轻循环油（LCO）经加氢处理后进行催化裂化生成苯、甲苯、二甲苯和乙苯等轻质芳烃（BTXE）的反应规律。认为加氢 LCO 中重质单环芳烃（包括烷基苯和环烃基苯）的含量及催化裂化反应条件是影响轻质芳烃产率的关键，适宜的加氢处理深度（加氢 LCO 氢质量分数为11．00％）、催化裂化较高的反应温度（大于550℃）和较大的剂油比（大于8）有利于生产轻质芳烃。在实验条件范围内，LCO 中环烃基苯的表观裂化反应比例大于73．4％，表观缩合反应比例小于14．7％，且高温有利于 LCO 中环烃基苯的裂化反应。加氢 LCO 经催化裂化反应生成轻质芳烃的单程产率可达14．3％，约占催化裂化产物中单环芳烃总量的1/3。
종분자수평연구료최화열화경순배유（LCO）경가경처리후진행최화열화생성분、갑분、이갑분화을분등경질방경（BTXE）적반응규률。인위가경 LCO 중중질단배방경（포괄완기분화배경기분）적함량급최화열화반응조건시영향경질방경산솔적관건，괄의적가경처리심도（가경 LCO 경질량분수위11．00％）、최화열화교고적반응온도（대우550℃）화교대적제유비（대우8）유리우생산경질방경。재실험조건범위내，LCO 중배경기분적표관열화반응비례대우73．4％，표관축합반응비례소우14．7％，차고온유리우 LCO 중배경기분적열화반응。가경 LCO 경최화열화반응생성경질방경적단정산솔가체14．3％，약점최화열화산물중단배방경총량적1/3。
The reaction rule on production of light aromatics (BTXE)of benzene,toluene,xylene and ethylbenzene from hydrotreated LCO by FCC process is studied on molecular level. The results show that the content of heavy monocyclic aromatics in hydrotreated LCO and FCC reaction conditions are the key factors which influence the yield of BTXE and that the optimal reaction conditions for con-verting LCO to light aromatics are:moderate hydrotreating severity (hydrogen content 11.00% in hy-drotreated LCO),high reaction temperature (over 550 ℃)and middle ratio of catalyst to oil (more than 8)of FCC process. In the range of experimental conditions,the proportion of the apparent cracking re-action of monocyclic aromatic hydrocarbons in hydrotreated LCO is above 73.4%,the condensation re-action is less than 14.7%,and the rest is unconverted monocyclic aromatics. Increasing FCC reaction temperature is favorable for monocyclic aromatics cracking. The once-through yield of light aromatics reaches 14.3% under experimental conditions,about 1/3 of all monocyclic aromatic hydrocarbons in FCC products. It is concluded that the integration of hydrogenation and FCC process is a cost-effective technology to convert inferior LCO to high value BTXE light aromatics.