Citation: TANG Jin-lian, XU You-hao, WANG Xie-qing, CHENG Cong-li. Opening of naphthenic ring in decalin cracking over zeolite catalysts[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(12): 1422-1428. shu

Opening of naphthenic ring in decalin cracking over zeolite catalysts

1.
Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China

Corresponding author: TANG Jin-lian,
Received Date: 16 December 2011
Available Online: 9 March 2012
Fund Project: 国家重点基础研究发展规划(973计划, 2006CB202501)。 (973计划, 2006CB202501)

Decalin cracking over Y and ZSM-5 zeolites were conducted in a small fixed fluidised bed (FFB) reactor; the effect of temperature and catalyst/oil ratio on the opening of naphthenic ring in decalin cracking over Y zeolite was investigated. The results showed that the products of decalin cracking over zeolite catalysts by naphthenic ring opening involve non-aromatics (propane, propylene, butane, butylenes, methylpenptane, cyclopentane, cyclohexane, etc.) and monocyclic aromatics (benzene, and C_1~4 alkyl benzene); polycyclic aromatics (tetrahydronaphthalene, naphthalene, alkyl naphthalene, phenanthrenes, pyrenes, etc.) and even coke may also be formed through dehydrogenation condensation reactions. The selectivity for naphthenic ring opening over ZSM-5 catalyst is higher than that over Y catalyst, due to difference in the diffusion and adsorption of naphthenic hydrocarbon on two catalysts. The relative ratio of naphthenic ring opening to dehydrogenation condensation reactions (NRO/DHC) is higher over ZSM-5 catalyst than that over Y catalyst. Under the conditions of 450~550 ℃, weight hourly space velocity of 10 h^-1, and catalyst/oil mass ratio of 3~9, with the increase of the reaction temperature or the catalyst/oil ratio, the bimolecular hydrogen transfer and dehydrogenation condensation are enhanced and as a result, the selectivity to the products from naphthenic ring opening is decreased.
- polycyclic naphthene,
- zeolite catalysts,
- catalytic cracking,
- decalin,
- naphthenic ring opening
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沈阳化工大学材料科学与工程学院沈阳 110142