On the synthesis and catalytic cracking properties of Al-ITQ-13 zeolites

被引：5

作者：

Zeng, Penghui ^{[1
]}

Guo, Xiaozhong ^{[1
]}

Zhu, Xiaochun ^{[1
]}

Guo, Qiaoxia ^{[1
]}

Wang, Yandan ^{[1
]}

Ren, Shenyong ^{[1
]}

Shen, Baojian ^{[1
]}

机构：

[1] China Univ Petr, Coll Sci, Coll Chem Engn, State Key Lab Heavy Oil Proc, 18 Fuxue Rd, Beijing 102249, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2017年 / 246卷

基金：

中国国家自然科学基金;

关键词：

Zeolite; Al-ITQ-13; Si/Al ratio; Synthesis; 1-Butene catalytic cracking; HYDROTHERMAL SYNTHESIS; SELECTIVE CATALYST; CRYSTAL-STRUCTURE; PORE ZEOLITE; SI/AL RATIOS; RING PORES; SILICA; ITQ-13; CHANNELS;

D O I：

10.1016/j.micromeso.2017.03.033

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Al-ITQ-13 zeolites with different Si/A1 atom ratios above 25 were successfully synthesized in short crystallization time by using seeds in the gel. A variety of synthesis conditions were investigated in-depth and the resultant zeolite samples were characterized by XRD, SEM, N-2 physisorption and FTIR spectra. Al-TQ-13 zeolite samples synthesized with different Si/AI ratios exhibit similar textural properties. The amount and strength of acid sites decrease with increasing Si/Al ratio of Al-ITQ-13 zeolites. It was found that H-Al-ITQ-13 samples with low Si/A1 ratios show a very high B/L ratio (such as 2.40) at a desorption temperature of 573 K. 1-Butene cracking reaction over proton form Al-ITQ-13 zeolites (Si/Al atom ratio from 47 to 179) was carried out in a continuous flow stainless steel reactor. It was found that the higher of the aluminium content in Al-ITQ-13 (i.e. lower Si/Al ratio), the better selectivity for ethylene and propylene yield. While the hydrogen transfer reaction and alkylation reaction were suppressed with increasing Si/A1 ratio. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：186 / 192

页数：7

共 34 条

[1] Boix T., 2002, US Pat., Patent No. [6471941, 6 471 941]
[2] The synthesis, characterization, and structure solution of SSZ-58: A novel two-dimensional 10-ring pore zeolite with previously unseen double 5-ring subunits
Burton, A
Elomari, S
Medrud, RC
Chan, IY
Chen, CY
Bull, LM
Vittoratos, ES
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (06) : 1633 - 1642
[3] Synthesis and structure of the bidimensional zeolite ITQ-32 with small and large pores
Cantín, A
Corma, A
Leiva, S
Rey, F
Rius, J
Valencia, S
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (33) : 11560 - 11561
[4] Direct synthesis of a 9 x 10 member ring zeolite (Al-ITQ-13):: A highly shape-selective catalyst for catalytic cracking
Castañeda, R
Corma, A
Fornés, V
Martínez-Triguero, J
Valencia, S
[J]. JOURNAL OF CATALYSIS, 2006, 238 (01) : 79 - 87
[5] Synthesis of a new zeolite structure ITQ-24, with intersecting 10-and 12-membered ring pores
Castañeda, R
Corma, A
Fornés, V
Rey, F
Rius, J
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (26) : 7820 - 7821
[6] A zeolite structure (ITQ-13) with three sets of medium-pore crossing channels formed by 9- and 10-rings
Corma, A
Puche, M
Rey, F
Sankar, G
Teat, SJ
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (10) : 1156 - 1159
[7] State of the art and future challenges of zeolites as catalysts
Corma, A
[J]. JOURNAL OF CATALYSIS, 2003, 216 (1-2) : 298 - 312
[8] Corma A., 2004, US Patent, Patent No. [6 709 572, 6709572]
[9] The hydrothermal synthesis of zeolites: Precursors, intermediates and reaction mechanism
Cundy, CS
Cox, PA
[J]. MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 82 (1-2) : 1 - 78
[10] The hydrothermal synthesis of zeolites: History and development from the earliest days to the present time
Cundy, CS
Cox, PA
[J]. CHEMICAL REVIEWS, 2003, 103 (03) : 663 - 701

← 1 2 3 4 →