Inorganic Chemicals Industry >
Study on synthesis，modification and olefin removal performance of boron-doped Y zeolite
Received date: 2022-03-15
Online published: 2022-12-19
Boron-doped Y zeolite（B-Y zeolite） was prepared by hydrothermal synthesis and then subjected to ammonium exchange and hydrothermal treatment to obtain modified B-Y zeolite（B-USY zeolite）.The composition，pore structure and acid property of B-Y zeolite and B-USY zeolite were characterized by a variety of characterization techniques，and the B-USY zeolite was used in the olefin removal reaction of reformate.The results showed that the unit cell parameters，relative crystallinity and framework stability of Y zeolite were decreased after the introduction of boron.Moreover，the introduction of boron promoted the increase of dealumination depth and the formation of connected mesopores during the modification process.Compared with USY zeolite modified by Y zeolite without boron doping，B-USY zeolite had abundant connected mesopores and good channel diffusion properties，and retained more weak Bronsted acid sites.Using reformed C7+ aromatics as raw material，the one-way life of B-USY zeolite catalyst was increased by 30% than that of USY zeolite under the conditions of reaction temperature of 170 ℃，pressure of 1.2 MPa and space velocity（LHSV） of 10 h-1.
Key words： boron-doped Y zeolite; mesopores; diffusion; acid property; olefin removal
Meihua HONG , Jiazhong ZANG , Lingtao WANG , Guanfeng LIU , Yupeng GONG , Xiaowei PENG . Study on synthesis，modification and olefin removal performance of boron-doped Y zeolite[J]. Inorganic Chemicals Industry, 2022 , 54(12) : 139 -147 . DOI: 10.19964/j.issn.1006-4990.2022-0119
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