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low-temperature catalytic cracking of heavy feedstock optimized by response surface method
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نویسنده
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alizad sina ,moosavi elham sadat ,karimzadeh ramin
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منبع
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journal of chemical and petroleum engineering - 2020 - دوره : 54 - شماره : 1 - صفحه:13 -33
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چکیده
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Upgrading of cracked pfo (pyrolysis fuel oil) for the production of liquid fuels, such as gasoline and light gasoil, was carried out in a semi-batch reactor. two different kinds of mesoporous and microporous catalysts, mcm-41 and zsm-5, were used. modification methods, such as ion exchange and impregnation with fe and ti, were done for tuning the acidity of the catalyst. xrd, ft-ir, and xrf analyzes were used to identify the structure and composition of the catalysts. among the catalysts used in low-temperature catalytic cracking of cracked pfo at a moderate temperature (380 °c), 3%ti/h-mcm-41 showed the best catalytic performance. after choosing the best catalyst, an experimental design was carried out using a response surface method with a five-level central composite design model. the effect of 3 main parameters, i.e. reaction temperature (360-400 °c), catalyst to feed ratio (0.04-0.1), and loading of ti (0-5%) was investigated on liquid productivity and light olefin production. design expert software was used to maximize the sum of liquid yield and olefins in the gas. in optimum condition (380 °c) with the ratio of 0.1 g/g catalyst to feed over 2.5%ti/h-mcm-41, the wt. % of liquid, gas, and solid products are 80 wt. %, 10 wt. %, and 10 wt. %, respectively. at this condition, 26 wt. % of liquid product was in the range of gasoline (c5-c10) and the rest (i.e. c11+) was considered in the range of light gas oil. light olefins of the obtained gas products were about 2.74 wt. %.
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کلیدواژه
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al-mcm-41 ,catalytic cracking ,pyrolysis fuel oil ,response surface ,zsm-5
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آدرس
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tarbiat modares university, chemical engineering faculty, iran, buein zahra technical university, department of materials and chemical engineering, iran, tarbiat modares university, chemical engineering faculty, iran
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پست الکترونیکی
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ramin@modares.ac.ir
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Authors
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