Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst

Mohamed H.M. Ahmed; Oki Muraza; Ahmad Galadima; Masato Yoshioka; Zain H. Yamani; Toshiyuki Yokoi

doi:10.1016/j.micromeso.2018.06.036

Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst

Mohamed H.M. Ahmed
, Oki Muraza^*
, Ahmad Galadima
, Masato Yoshioka
, Zain H. Yamani
, Toshiyuki Yokoi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

A successful incorporation of boron into *BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-*BEA seeds. Interestingly, the boron-*BEA crystals exhibited a cubic morphology with a remarkable decrease in the crystal size as compared with Al-*BEA seeds. The effect of boron addition on *BEA zeolite acidity was investigated by NH₃-TPD and pyridine FTIR. The type of boron coordination in the framework of *BEA zeolite was observed by ¹¹B MAS NMR. The results confirmed the formation of tetrahedral (BO₄) and trigonal (BO₃) boron species. The catalyst with highest boron content (Si/B = 6) showed the best catalytic transformation of methanol to olefins and the lowest deactivation rate. Moreover, it showed the highest propylene selectivity of 60% as well as the highest propylene-to-ethylene ratio (P/E) of 7.5.

Original language	English
Pages (from-to)	249-255
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	273
DOIs	https://doi.org/10.1016/j.micromeso.2018.06.036
State	Published - 1 Jan 2019

Bibliographical note

Publisher Copyright:
© 2018

Keywords

*BEA zeolite
Boron-aluminum acidity
Hierarchical pores
In situ synthesis
Methanol to propylene

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics
Mechanics of Materials

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10.1016/j.micromeso.2018.06.036

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@article{a885985467ab486da93198ea68e1b61b,

title = "Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst",

abstract = "A successful incorporation of boron into *BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-*BEA seeds. Interestingly, the boron-*BEA crystals exhibited a cubic morphology with a remarkable decrease in the crystal size as compared with Al-*BEA seeds. The effect of boron addition on *BEA zeolite acidity was investigated by NH3-TPD and pyridine FTIR. The type of boron coordination in the framework of *BEA zeolite was observed by 11B MAS NMR. The results confirmed the formation of tetrahedral (BO4) and trigonal (BO3) boron species. The catalyst with highest boron content (Si/B = 6) showed the best catalytic transformation of methanol to olefins and the lowest deactivation rate. Moreover, it showed the highest propylene selectivity of 60\% as well as the highest propylene-to-ethylene ratio (P/E) of 7.5.",

keywords = "*BEA zeolite, Boron-aluminum acidity, Hierarchical pores, In situ synthesis, Methanol to propylene",

author = "Ahmed, \{Mohamed H.M.\} and Oki Muraza and Ahmad Galadima and Masato Yoshioka and Yamani, \{Zain H.\} and Toshiyuki Yokoi",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2019",

month = jan,

day = "1",

doi = "10.1016/j.micromeso.2018.06.036",

language = "English",

volume = "273",

pages = "249--255",

}

Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst. / Ahmed, Mohamed H.M.; Muraza, Oki; Galadima, Ahmad et al.
In: Microporous and Mesoporous Materials, Vol. 273, 01.01.2019, p. 249-255.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst

AU - Ahmed, Mohamed H.M.

AU - Muraza, Oki

AU - Galadima, Ahmad

AU - Yoshioka, Masato

AU - Yamani, Zain H.

AU - Yokoi, Toshiyuki

PY - 2019/1/1

Y1 - 2019/1/1

N2 - A successful incorporation of boron into *BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-*BEA seeds. Interestingly, the boron-*BEA crystals exhibited a cubic morphology with a remarkable decrease in the crystal size as compared with Al-*BEA seeds. The effect of boron addition on *BEA zeolite acidity was investigated by NH3-TPD and pyridine FTIR. The type of boron coordination in the framework of *BEA zeolite was observed by 11B MAS NMR. The results confirmed the formation of tetrahedral (BO4) and trigonal (BO3) boron species. The catalyst with highest boron content (Si/B = 6) showed the best catalytic transformation of methanol to olefins and the lowest deactivation rate. Moreover, it showed the highest propylene selectivity of 60% as well as the highest propylene-to-ethylene ratio (P/E) of 7.5.

AB - A successful incorporation of boron into *BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-*BEA seeds. Interestingly, the boron-*BEA crystals exhibited a cubic morphology with a remarkable decrease in the crystal size as compared with Al-*BEA seeds. The effect of boron addition on *BEA zeolite acidity was investigated by NH3-TPD and pyridine FTIR. The type of boron coordination in the framework of *BEA zeolite was observed by 11B MAS NMR. The results confirmed the formation of tetrahedral (BO4) and trigonal (BO3) boron species. The catalyst with highest boron content (Si/B = 6) showed the best catalytic transformation of methanol to olefins and the lowest deactivation rate. Moreover, it showed the highest propylene selectivity of 60% as well as the highest propylene-to-ethylene ratio (P/E) of 7.5.

KW - BEA zeolite

KW - Boron-aluminum acidity

KW - Hierarchical pores

KW - In situ synthesis

KW - Methanol to propylene

UR - https://www.scopus.com/pages/publications/85049775140

U2 - 10.1016/j.micromeso.2018.06.036

DO - 10.1016/j.micromeso.2018.06.036

M3 - Article

AN - SCOPUS:85049775140

SN - 1387-1811

VL - 273

SP - 249

EP - 255

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Choreographing boron-aluminum acidity and hierarchical porosity in *BEA zeolite by in-situ hydrothermal synthesis for a highly selective methanol to propylene catalyst

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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