High temperature synthesis of nanostructured Ce-SAPO-34 catalyst used in conversion of methanol to light olefins: effect of temperature on physicochemical properties and catalytic performance

Aghaei, Erfan; Haghighi, Mohammad

doi:10.1007/s10934-014-9885-5

Cited by 42 publications

(26 citation statements)

References 59 publications

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“…With increasing oil prices and international awareness of 11 environmental concerns, it seems that finding alternative process-12 es for production of light olefins from more economically 13 convenient raw materials and with smaller impact to environment 14 to be most urgent [1][2][3]. Regarding to the abundance and lower 15 cost of light alkanes, upgrading them to the corresponding alkenes 16 may become interesting processes to meet future demands for 17 light olefins [4], particularly for ethylene.…”

mentioning

confidence: 99%

The beneficial utilization of natural zeolite in preparation of Cr/clinoptilolite nanocatalyst used in CO2-oxidative dehydrogenation of ethane to ethylene

Rahmani

Haghighi

Amini

2015

Journal of Industrial and Engineering Chemistry

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confidence: 99%

The beneficial utilization of natural zeolite in preparation of Cr/clinoptilolite nanocatalyst used in CO2-oxidative dehydrogenation of ethane to ethylene

Rahmani

Haghighi

Amini

2015

Journal of Industrial and Engineering Chemistry

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“…Various catalysts such as silicoaluminophosphate (SAPO)‐5, SAPO‐11, SAPO‐17, SAPO‐18, SAPO‐35, zeolite socony mobil (ZSM)‐5, and SAPO‐34 have been used in MTO process . SAPO‐34 and ZSM‐5 zeolites are the most promising catalysts for this process .…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Various catalysts such as silicoaluminophosphate (SAPO)-5, SAPO-11, SAPO-17, SAPO-18, SAPO-35, zeolite socony mobil (ZSM)-5, and SAPO-34 have been used in MTO process. [13][14][15][16][17][18] SAPO-34 and ZSM-5 zeolites are the most promising catalysts for this process. [19][20][21] The most important characteristics of these catalysts are shape selectivity, moderate acidity, and thermal/hydrothermal stability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced stability and propylene yield in methanol to light olefins conversion over nanostructured SAPO‐34/ZSM‐5 composite with various SAPO‐loadings

Mohammadkhani

Haghighi

Aghaei

2018

Asia-Pacific J Chem Eng

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Nanostructured core‐shell silicoaluminophosphate (SAPO)‐34/zeolite socony mobil (ZSM)‐5 composite has been synthesized with various SAPO‐34 loadings in order to control light olefins selectivity and increase its lifetime in methanol to olefins process. Physicochemical properties and catalytic performance of SAPO‐34/ZSM‐5 composite catalyst were different, compared with the parent SAPO‐34 and ZSM‐5. As‐synthesized samples were characterized by different methods such as X‐Ray diffraction, field emission scanning electron microscopy, Brunauer–Emmett–Teller, energy‐dispersive X‐ray, Fourier transform infrared spectroscopy, and NH3‐temperature‐programmed desorption techniques. By increasing SAPO‐34 content in composite catalysts, relative crystallinity of CHA‐phase (chabazite) was enhanced, whereas it was decreased for MFI‐phase. Also, surface area improved by increasing SAPO‐34 loading in core‐shell composite catalysts. The results of the activity test showed that lifetime remarkably increased by using composite catalysts. Compared with the parent SAPO‐34 and ZSM‐5, the composite catalyst with 80% SAPO‐34 loading showed higher methanol conversion and olefins selectivity with time on stream. This is due to the synergic effect between SAPO‐34 and ZSM‐5 zeolites in composite catalyst.

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“…Methanol to olefins (MTO) process represents a type of petrochemical plant, which can be brought on stream as the technological and economic demands arise. Light olefins, especially ethylene and propylene, are valuable intermediate compounds generated catalytically from methanol . In recent years, it has been well established that the small‐pore silicoaluminophosphate, SAPO‐34, is an extremely efficient shape selective catalyst towards ethylene and propylene formation .…”

Section: Introductionmentioning

confidence: 99%

Incorporation of mono and bimetallic MnNi into SAPO‐34 framework used in conversion of methanol to ethylene and propylene: Alteration of acidic properties and catalytic performance

Sadeghpour

Haghighi

2018

Asia-Pacific J Chem Eng

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Nanostructured Ni, and MnNi) catalysts were synthesized by hydrothermal method using diethylamine (DEA) as template. The influence of Ni, Mn, and MnNi metal ions incorporation into the SAPO-34 framework was investigated on its physicochemical properties and catalytic performance towards methanol to light olefins. The samples were characterized by X-ray diffraction, field emission scanning electron microscopy, particle size distribution, energy dispersive X-ray, Brunner-Emmett-Teller, Fourier transform infrared, UV-vis spectroscopy, and temperature-programmed desorption of ammonia techniques. The results of X-ray diffraction patterns revealed that various metals, based on their unique characteristics, play different roles in the crystallization of SAPO-34 crystalline phase. The energy dispersive X-ray micrographs indicated appropriate distribution of Mn metal ions in comparison with Ni modifier. The catalytic performance of these catalysts showed that the type of metal ions has low effect on methanol conversion, whereas it has considerable effect on stability and products selectivity. The stability of MnAPSO-34 catalyst is much higher than the others. The selectivity of olefins for this sample with a high specific surface area and proper distribution of strong/weak acid sites was about 98% after 10 hr. The main steps of metal ions incorporation into the SAPO-34 framework and a possible reaction mechanism for methanol to light olefins process were discussed in details.

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High temperature synthesis of nanostructured Ce-SAPO-34 catalyst used in conversion of methanol to light olefins: effect of temperature on physicochemical properties and catalytic performance

Cited by 42 publications

References 59 publications

The beneficial utilization of natural zeolite in preparation of Cr/clinoptilolite nanocatalyst used in CO2-oxidative dehydrogenation of ethane to ethylene

The beneficial utilization of natural zeolite in preparation of Cr/clinoptilolite nanocatalyst used in CO2-oxidative dehydrogenation of ethane to ethylene

Enhanced stability and propylene yield in methanol to light olefins conversion over nanostructured SAPO‐34/ZSM‐5 composite with various SAPO‐loadings

Incorporation of mono and bimetallic MnNi into SAPO‐34 framework used in conversion of methanol to ethylene and propylene: Alteration of acidic properties and catalytic performance

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