Metal-substituted sponge-like MFI zeolites as high-performance catalysts for selective conversion of methanol to propylene

被引:10
作者
Hadi, Naser [1 ]
Farzi, Ali [1 ]
Alizadeh, Reza [2 ]
Niaei, Aligholi [1 ]
机构
[1] Univ Tabriz, Fac Chem & Petr Engn, Tabriz, Iran
[2] Sahand Univ Technol, Fac Chem Engn, Tabriz, Iran
关键词
Metal-substituted sponge-like MFI zeolite; C22-6-6Br2; surfactant; Seed-assisted hydrothermal synthesis; Methanol to propylene; Neuro-genetic approach; RSM-CCD technique; TO-OLEFINS PROCESS; INTELLIGENT APPROACH; HZSM-5; ZEOLITES; DIMETHYL ETHER; AIDED DESIGN; NO REDUCTION; NATURAL-GAS; OPTIMIZATION; NANOSHEETS; OXIDATION;
D O I
10.1016/j.micromeso.2020.110406
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
In this study, sponge-like and M-substituted (M: Mn, W and Ce) sponge-like MFI zeolites were successfully synthesized by seed-assisted hydrothermal technique. The special bi-functional organic surfactant of C22-6-6Br2 with multi-ammonium groups was separately synthesized and used as structure directing agent (SDA). The prepared catalyst samples were examined in methanol to propylene (MTP) process and demonstrated superior catalytic performance compared to conventional H-ZSM-5 and M-substituted MFI zeolite nanosheets. The W-substituted sponge-like MFI zeolite effectively showed the most enhanced catalytic activity with complete methanol conversion, propylene selectivity of 56.3%, total selectivity of light olefins of 88.3% and catalytic life-span of 161 h. Moreover, to increase propylene selectivity, bi-metallic and trTmetallic sponge-like MFI zeolites were successfully synthesized via seed-assisted hydrothermal method by utilizing central composite design (CCD) strategy. For optimizing promoter compositions in lattice of bi-metallic and tri-metallic sponge-like MFI zeolites, the incorporated response surface methodology (RSM)-CCD technique and also an intelligent approach namely neuro-genetic method were applied. It was deduced that optimal bi-metallic sponge-like MFI zeolite suggested by neuro-genetic approach approved the highest propylene selectivity (66.7%). Synthesized catalysts were appropriately characterized by XRD, FE-SEM, EDX, TEM, FT-IR, N-2 adsorption/desorption and NH3-TPD analyses which comparatively approved high specific surface area and dominant meso-porosity.
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页数:16
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共 83 条
[61]   Modeling Preparation Condition and Composition-Activity Relationship of Perovskite-Type LaxSr1-xFeyCo1-yO3 Nano Catalyst [J].
Oskoui, Samira Arefi ;
Niaei, Aligholi ;
Tseng, Hui-Hsin ;
Salari, Dariush ;
Izadkhah, Behrang ;
Hosseini, Seyed Ali .
ACS COMBINATORIAL SCIENCE, 2013, 15 (12) :609-621
[62]   NO reduction over nanostructure M-Cu/ZSM-5 (M: Cr, Mn, Co and Fe) bimetallic catalysts and optimization of catalyst preparation by RSM [J].
Panahi, P. Nakhostin ;
Salari, D. ;
Niaei, A. ;
Mousavi, S. M. .
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2013, 19 (06) :1793-1799
[63]   IR study on methanol-to-olefin reaction over zeolites with different pore structures and acidities [J].
Park, Ji Won ;
Seo, Gon .
APPLIED CATALYSIS A-GENERAL, 2009, 356 (02) :180-188
[64]   Kinetic modeling of the methanol to olefins process. 1. Model formulation [J].
Park, TY ;
Froment, GF .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (20) :4172-4186
[65]   Hierarchically Structure-Directing Effect of Multi-Ammonium Surfactants for the Generation of MFI Zeolite Nanosheets [J].
Park, Woojin ;
Yu, Doae ;
Na, Kyungsu ;
Jelfs, Kim E. ;
Slater, Ben ;
Sakamoto, Yasuhiro ;
Ryoo, Ryong .
CHEMISTRY OF MATERIALS, 2011, 23 (23) :5131-5137
[66]   Behaviors of coke deposition on SAPO-34 catalyst during methanol conversion to light olefins [J].
Qi, Guozhen ;
Xie, Zaiku ;
Yang, Weimin ;
Zhong, Siqing ;
Liu, Hongxing ;
Zhang, Chengfang ;
Chen, Qingling .
FUEL PROCESSING TECHNOLOGY, 2007, 88 (05) :437-441
[67]   Pore fabrication of nano-ZSM-5 zeolite by internal desilication and its influence on the methanol to hydrocarbon reaction [J].
Qi, Ruiyue ;
Fu, Tingjun ;
Wan, Weili ;
Li, Zhong .
FUEL PROCESSING TECHNOLOGY, 2017, 155 :191-199
[68]   Bifunctional and bimetallic Fe/ZSM-5 nanocatalysts for methanol to olefin reaction [J].
Rostamizadeh, Mohammad ;
Yaripour, Fereydoon .
FUEL, 2016, 181 :537-546
[69]   Highly selective Me-ZSM-5 catalyst for methanol to propylene (MTP) [J].
Rostamizadeh, Mohammad ;
Taeb, Abbas .
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2015, 27 :297-306
[70]   FTIR and 27Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons [J].
Sazama, Petr ;
Wichterlova, Blanka ;
Dedecek, Jiri ;
Tvaruzkova, Zdenka ;
Musilova, Zuzana ;
Palumbo, Luisa ;
Sklenak, Stepan ;
Gonsiorova, Olga .
MICROPOROUS AND MESOPOROUS MATERIALS, 2011, 143 (01) :87-96