Dimethyl Ether Conversion to Light Olefins on Zeolite Catalysts: Effect of MFI-Type Zeolite Nature and SiO2/Al2O3 Molar Ratio on Catalyst Efficiency

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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Dimethyl Ether Conversion to Olefins over the SAPO-34/ZrO2 Catalysts: Effect of the ZrO2 Supporter

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.3681 ◽

2011 ◽

Vol 347-353 ◽

pp. 3681-3684 ◽

Cited By ~ 1

Author(s):

Young Ho Kim ◽

Su Gyung Lee ◽

Byoung Kwan Yoo ◽

Han Sol Je ◽

Chu Sik Park

Keyword(s):

Physicochemical Properties ◽

Dimethyl Ether ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Coke Deposition ◽

Light Olefins ◽

Similar Activity ◽

Dimethyl Ether Conversion ◽

Zro2 Catalyst ◽

Catalyst Lifetime

A SAPO-34 catalyst is well known to be one of the best catalysts for DME to olefins (DTO) reaction. Main products of the reaction were light olefins such as ethylene, propylene and butenes. However, the main problem is rapid deactivation of the SAPO-34 catalyst due to coke deposition during DTO reaction. In this study, various SAPO-34/ZrO2 catalysts added with ZrO2 were prepared for improving the lifetime and their physicochemical properties have been characterized by XRD and SEM. The DTO reaction over various SAPO-34/ZrO2 catalysts was carried out using a fixed bed reactor. All SAPO-34/ZrO2 catalysts showed similar activity and selectivity in the DTO reaction. The SAPO-34(9wt%)/ZrO2 catalyst was showed the best performance for the catalyst lifetime.

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Effect of magnesium on the catalytic properties of polymetallic zeolite catalysts for conversion of dimethyl ether to light olefins

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2020.110087 ◽

2020 ◽

Vol 298 ◽

pp. 110087 ◽

Cited By ~ 1

Author(s):

N.V. Kolesnichenko ◽

Е.N. Khivrich ◽

T.K. Obukhova ◽

Т.I. Batova ◽

G.N. Bondarenko

Keyword(s):

Dimethyl Ether ◽

Catalytic Properties ◽

Zeolite Catalysts ◽

Light Olefins

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Comparison and assessment of zeolite catalysts performance dimethyl ether and light olefins production through methanol: a review

Reviews in Inorganic Chemistry ◽

10.1515/revic-2019-0001 ◽

2019 ◽

Vol 39 (3) ◽

pp. 157-177 ◽

Cited By ~ 12

Author(s):

Ehsan Kianfar

Keyword(s):

Dimethyl Ether ◽

Raw Materials ◽

Fixed Bed ◽

Value Added ◽

Zeolite Catalysts ◽

Present Review ◽

Light Olefins ◽

Light Olefin ◽

Production Methods ◽

Olefin Production

AbstractThe present review focuses on a comparison and assessment of zeolite catalyst performance of dimethyl ether and light olefin production through methanol. Dimethyl ether is a clean fuel which needs diverse processes to be produced. Methanol to dimethyl ether is a very novel process which offers considerable advantages versus additional processes for the production of dimethyl ether. The corresponding fixed-bed reactors compose the most important section of such a process. Production of dimethyl ether by the mentioned process is of high importance since it can be catalytically transferred to a substance with the value of propylene. Furthermore, in case of capability to transfer low-purity methanol into dimethyl ether, less expensive methanol can be consequently achieved with higher value added. In the petrochemical industry, light olefins, for example, ethylene and propylene, can be used as raw materials for the production of polyolefin. The present review aims to produce dimethyl ether in order to reach olefin substances, initially conducting a compressive assessment on production methods of olefin substances.

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Development of ZSM-5-Type Zeolite Catalysts Containing Alkaline Earth Metals for Conversion of Methanol to Light Olefins

Advanced Porous Materials ◽

10.1166/apm.2016.1100 ◽

2016 ◽

Vol 4 (1) ◽

pp. 9-23 ◽

Cited By ~ 2

Author(s):

Hideo Okado ◽

Tsuneji Sano ◽

Haruo Takaya

Keyword(s):

Alkaline Earth ◽

Alkaline Earth Metals ◽

Zeolite Catalysts ◽

Light Olefins ◽

Type Zeolite

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Synthesis and characterization of Cu-X/γ-Al2O3 catalyst by intermittent microwave irradiation for hydrogen generation from dimethyl ether steam reforming

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq160203029h ◽

2018 ◽

Vol 24 (2) ◽

pp. 169-178

Author(s):

Shilin Huang ◽

Juan Li ◽

Chang-Feng Yan ◽

Zhida Wang ◽

Changqing Guo ◽

...

Keyword(s):

Microwave Irradiation ◽

Dimethyl Ether ◽

Steam Reforming ◽

Hydrogen Generation ◽

Molar Ratio ◽

Hydrogen Yield ◽

Methanol Reforming ◽

Dimethyl Ether Conversion ◽

Shift Reaction ◽

Al2o3 Catalyst

A series of Cu-X/?-Al2O3 (X = Fe, Co, Ni) catalysts were synthesized by a rapid intermittent microwave irradiation method for hydrogen generation from dimethyl ether steam reforming. Different parameters, such as the promoters of X (X = Fe, Co, Ni), microwave irradiation procedure and the ratio of metal to ?-Al2O3, were investigated. The results show that 2Cu-Fe/72?-Al2O3 has the best performance, for which the agglomeration is prevented, CuO is well dispersed and the catalytic activity is improved. Promoter iron oxide in 2Cu-Fe/9?-Al2O3 facilitates the watergas shift reaction, which lead to an increase in the conversion of CO to CO2 and hydrogen yield. Particularly, the 2Cu-Fe/72?-Al2O3 catalyst, with the best molar ratio of metal to ?-Al2O3, shows a dimethyl ether conversion of >99% and a hydrogen yield of >98% and produces the lowest CO content of 1.4%, indicating that the synergism between dimethyl ether hydrolysis and methanol reforming requires an appropriate balance between the metallic Cu-Fe and the acid ?-Al2O3. The intermittent microwave irradiation technique provides a simple but effective method of the Cu-Fe/?-Al2O3 synthesis with a good catalyst performance for the dimethyl ether steam reforming.

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