Phase-selective synthesis of a silicoaluminophosphate molecular sieve from dry gels

Khan, Nazmul Abedin; Park, Jung Hwa; Jhung, Sung Hwa

doi:10.1016/j.materresbull.2010.01.003

Cited by 21 publications

(25 citation statements)

References 34 publications

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“…The additional porosity in comparison to hierarchical SAPO-34 known from the literature is higher when using carbon as a secondary template [26,44,45]. However, the mesopore volume of carbon-templated ZSM-5 could not be achieved [22,46].…”

Section: Discussionmentioning

confidence: 92%

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Schmidt

Paasch

Brunner

et al. 2012

Microporous and Mesoporous Materials

130

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Section: Discussionmentioning

confidence: 92%

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Schmidt

Paasch

Brunner

et al. 2012

Microporous and Mesoporous Materials

130

View full text Add to dashboard Cite

“…The template of SAPO-34 is not mixed with the initial gel. Rather a small amount of template plus water are put at the bottom of an autoclave [72][73][74][75][76]. In the DGC method, the absorbed water in the dried gel and the water placed at the bottom of autoclaves exert a strong influence on crystallization [77,78].…”

Section: Dry Gel Conversion Methodsmentioning

confidence: 99%

Different techniques and their effective parameters in nano SAPO-34 synthesis: A review

et al. 2016

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“…In addition, the conversion of DME to coke deposition is more likely at higher temperatures that lower the DME selectivity and the CO conversion decreases because of poisoning of the catalyst surface. It is revealed that at high temperatures, the dehydration activity of zeolites increases . Therefore, it is suggested that at temperatures lower than 250°C, the dehydration of methanol reaction was the rate‐limiting step.…”

Section: Resultsmentioning

confidence: 99%

Direct conversion of syngas to DME over CuO-ZnO-Al₂O₃/HZSM-5 nanocatalyst synthesized via ultrasound-assisted co-precipitation method: New insights into the role of gas injection

Allahyari

Haghighi

Ebadi

et al. 2014

Int. J. Energy Res.

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SUMMARYIn this study, direct synthesis of dimethyl ether (DME) is conducted over a bifunctional CuO-ZnO-Al 2 O 3 /H Zeolite Socony Mobil-5 (HZSM-5) nanocatalyst. A hybrid method of ultrasound-assisted co-precipitation is used for the synthesis of catalysts, and the effect of gas injection during sonication is investigated. The physicochemical characteristics of the catalysts are analysed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), particle size distribution (PSD), energy dispersive X-ray (EDX), Brunauer-Emmett-Teller (BET) and Fourier-transformed infrared (FTIR) methods. In the absence of gas injection, the acetate-based catalysts have a better morphology and higher surface area than the nitrate-based catalyst. Gas injection significantly changes the morphology and structural properties of the acetate-based catalyst. High surface area, narrow PSD and better dispersion of small CuO crystals are obtained in a gas-injected synthesized sample. DME synthesis experiments showed that the CO conversion and DME selectivity are correlated with surface area, nanocatalyst particle size and its dispersion. The gas-injected CuO-ZnO-Al 2 O 3 /HZSM-5 nanocatalyst that has the highest surface area and the smallest dispersed particles showed more than 70% DME selectivity. The gas-injected CuO-ZnO-Al 2 O 3 /HZSM-5 nanocatalyst exhibited high stability in terms of CO conversion and DME yield over 1440-min time on a stream test at 275°C, 40 bar and 18 000 cm 3 g.h À1 .

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Phase-selective synthesis of a silicoaluminophosphate molecular sieve from dry gels

Cited by 21 publications

References 34 publications

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Different techniques and their effective parameters in nano SAPO-34 synthesis: A review

Direct conversion of syngas to DME over CuO-ZnO-Al₂O₃/HZSM-5 nanocatalyst synthesized via ultrasound-assisted co-precipitation method: New insights into the role of gas injection

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Phase-selective synthesis of a silicoaluminophosphate molecular sieve from dry gels

Cited by 21 publications

References 34 publications

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Carbon templated SAPO-34 with improved adsorption kinetics and catalytic performance in the MTO-reaction

Different techniques and their effective parameters in nano SAPO-34 synthesis: A review

Direct conversion of syngas to DME over CuO-ZnO-Al2O3/HZSM-5 nanocatalyst synthesized via ultrasound-assisted co-precipitation method: New insights into the role of gas injection

Contact Info

Product

Resources

About

Direct conversion of syngas to DME over CuO-ZnO-Al₂O₃/HZSM-5 nanocatalyst synthesized via ultrasound-assisted co-precipitation method: New insights into the role of gas injection