Nano BEA zeolite catalysts for the selective catalytic cracking of n-dodecane to light olefins

Galal A. Nasser; M. H. M. Ahmed; Mochamad A. Firdaus; Mohammed A. Sanhoob; Idris A. Bakare; E. N. Al-Shafei; M. Z. Al-Bahar; A. N. Al-Jishi; Z. H. Yamani; Ki-Hyouk Choi; Oki Muraza

doi:10.1039/d0ra07899a

Nano BEA zeolite catalysts for the selective catalytic cracking of n-dodecane to light olefins

RSC Advances ◽

10.1039/d0ra07899a ◽

2021 ◽

Vol 11 (14) ◽

pp. 7904-7912

Author(s):

Galal A. Nasser ◽

M. H. M. Ahmed ◽

Mochamad A. Firdaus ◽

Mohammed A. Sanhoob ◽

Idris A. Bakare ◽

...

Keyword(s):

Catalytic Cracking ◽

Zeolite Catalysts ◽

Light Olefins ◽

Bea Zeolite

Nano BEA zeolite catalysts were synthesized and modified by desilication and then ion-exchanged with Co. The desilication was carried out using 0.1 M of NaOH.

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Solvent-Free Synthesis of SAPO-34 Zeolite with Tunable SiO2/Al2O3 Ratios for Efficient Catalytic Cracking of 1-Butene

Catalysts ◽

10.3390/catal11070835 ◽

2021 ◽

Vol 11 (7) ◽

pp. 835

Author(s):

Xia Xiao ◽

Zhongliang Xu ◽

Peng Wang ◽

Xinfei Liu ◽

Xiaoqiang Fan ◽

...

Keyword(s):

Catalytic Cracking ◽

Acid Sites ◽

Solvent Free ◽

Zeolite Catalysts ◽

Light Olefins ◽

Molar Ratio ◽

Coordination Environment ◽

Starting Mixture ◽

Synthesis Methodology ◽

Solvent Free Synthesis

Solvent-free synthesis methodology is a promising technique for the green and sustainable preparation of zeolites materials. In this work, a solvent-free route was developed to synthesize SAPO-34 zeolite. The characterization results indicated that the crystal size, texture properties, acidity and Si coordination environment of the resulting SAPO-34 were tuned by adjusting the SiO2/Al2O3 molar ratio in the starting mixture. Moreover, the acidity of SAPO-34 zeolite was found to depend on the Si coordination environment, which was consistent with that of SAPO-34 zeolite synthesized by the hydrothermal method. At an SiO2/Al2O3 ratio of 0.6, the SP-0.6 sample exhibited the highest conversion of 1-butene (82.8%) and a satisfactory yield of light olefins (51.6%) in the catalytic cracking of 1-butene, which was attributed to the synergistic effect of the large SBET (425 m2/g) and the abundant acid sites (1.82 mmol/g). This work provides a new opportunity for the design of efficient zeolite catalysts for industrially important reactions.

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Selective Formation of Light Olefins by Catalytic Cracking of Naphtha Components over ZSM-5 Zeolite Catalysts

Journal of the Japan Petroleum Institute ◽

10.1627/jpi.61.10 ◽

2018 ◽

Vol 61 (1) ◽

pp. 10-19 ◽

Cited By ~ 3

Author(s):

Kohei Kubo ◽

Hajime Iida ◽

Seitaro Namba ◽

Akira Igarashi

Keyword(s):

Catalytic Cracking ◽

Zeolite Catalysts ◽

Light Olefins ◽

Selective Formation

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A diffusion anisotropy descriptor links morphology effects of H-ZSM-5 zeolites to their catalytic cracking performance

Communications Chemistry ◽

10.1038/s42004-021-00543-w ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Xiaoliang Liu ◽

Jing Shi ◽

Guang Yang ◽

Jian Zhou ◽

Chuanming Wang ◽

...

Keyword(s):

Catalytic Activity ◽

Catalytic Cracking ◽

Catalytic Performance ◽

Zeolite Catalysts ◽

Time Resolved ◽

Cracking Performance ◽

Morphology Effect ◽

Ft Ir ◽

The Difference ◽

Dynamics Simulations

AbstractZeolite morphology is crucial in determining their catalytic activity, selectivity and stability, but quantitative descriptors of such a morphology effect are challenging to define. Here we introduce a descriptor that accounts for the morphology effect in the catalytic performances of H-ZSM-5 zeolite for C4 olefin catalytic cracking. A series of H-ZSM-5 zeolites with similar sheet-like morphology but different c-axis lengths were synthesized. We found that the catalytic activity and stability is improved in samples with longer c-axis. Combining time-resolved in-situ FT-IR spectroscopy with molecular dynamics simulations, we show that the difference in catalytic performance can be attributed to the anisotropy of the intracrystalline diffusive propensity of the olefins in different channels. Our descriptor offers mechanistic insight for the design of highly effective zeolite catalysts for olefin cracking.

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