Synthesis of highly selective and stable mesoporous Ni–Ce/SAPO-34 nanocatalyst for methanol-to-olefin reaction: Role of polar aprotic N,N-dimethylformamide solvent--颗粒学报PARTICUOLOGY

Akhoundzadeh, H., Taghizadeh, M., & Sharifi Pajaie, H. (2018). Synthesis of highly selective and stable mesoporous Ni–Ce/SAPO-34 nanocatalyst for methanol-to-olefin reaction: Role of polar aprotic N,N-dimethylformamide solvent. Particuology, 40, 113-122. https://doi.org/10.1016/j.partic.2017.11.004

Synthesis of highly selective and stable mesoporous Ni–Ce/SAPO-34 nanocatalyst for methanol-to-olefin reaction: Role of polar aprotic N,N-dimethylformamide solvent

Hossein Akhoundzadeh ^a, Majid Taghizadeh ^a *, Hassan Sharifi Pajaie ^b

a Chemical Engineering Department, Babol Noshirvani University of Technology, P.O. Box 484, Babol 4714871167, Iran
b Wood and Paper Science Department, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resource University, P.O. Box 737, Sari, Iran

/10.1016/j.partic.2017.11.004

Volume 40, October 2018, Pages 113-122

Received 4 March 2017, Revised 23 October 2017, Accepted 15 November 2017, Available online 21 February 2018, Version of Record 28 July 2018.

E-mail: taghizadeh@nit.ac.ir

Highlights

• Ni–Ce/SAPO-34 catalyst was synthesized by incorporation and impregnation methods.

• Impregnation using aprotic solvent led to a better dispersion of metal species.

• Ni–Ce/SAPO-34(IM-DMF) showed a superior catalytic performance in the MTO reaction.

Abstract

A series of mesoporous nanocrystalline silicoaluminophosphate (SAPO) zeolites (SAPO-34) were synthesized via an ultrasonic and microwave-assisted hydrothermal method in the presence of [3-(trimethoxysilyl)propyl]octadecyldimethylammonium chloride and cetyltrimethylammonium bromide surfactants as soft templates. Nickel and cerium were then doped on SAPO-34 using incorporation and impregnation methods, and all the catalysts were applied to the methanol-to-olefin (MTO) reaction. The catalysts were characterized using X-ray diffraction, field-emission scanning electron microcopy, inductively coupled plasma–atomic emission spectroscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller analysis, NH₃ temperature-programmed desorption analysis, and thermogravimetric analysis. For the impregnation method, the effect of using protic or aprotic solvents as impregnation media on the physico-chemical properties of the metal-based SAPO-34 was investigated. Water and N,N-dimethylformamide (DMF) were employed as the protic and aprotic solvents, respectively. The catalyst prepared using the aprotic DMF solvent exhibited higher dispersion and lower aggregation of metal species compared with that prepared using the protic water solvent. Furthermore, the sample synthesized using the incorporation method exhibited good catalytic performance; however, the Ni–Ce/SAPO-34 sample prepared using the impregnation method and aprotic DMF solvent exhibited superior catalytic performance in the MTO reaction.

Graphical abstract

Keywords

Ni–Ce/SAPO-34; MTO reactionImpregnation; Aprotic solvent; Protic solvent

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