Methanol to Olefin over Ca-Modified HZSM-5 Zeolites

Zhang, Suhong; Zhang, Bianling; Gao, Zhixian; Han, Yizhuo

doi:10.1021/ie901446m

Cited by 48 publications

(36 citation statements)

References 20 publications

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“…Calcium doping was used for the methanol (or dimethyl ether, DME) to olefin process and at certain Ca loadings it allowed a significant increase of the catalyst stability. [20][21][22] Modification with Ag, Cu and Ni was found to enhance the selectivity of methanol to C6-C11 aromatic products. 23 It was reported that doping of HZSM-5 with Ni allows for an improvement of catalyst stability against coke formation in the transformation of bioethanol into olefins.…”

Section: Introductionmentioning

confidence: 97%

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

et al. 2016

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(2016) Metal oxide-zeolite composites in transformation of methanol to hydrocarbons : do iron oxide and nickel oxide matter? RSC Advances, 6 (79). pp. 75166-75177. Permanent WRAP URL:http://wrap.warwick.ac.uk/81920 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work of researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher statement:First published by Royal Society of Chemistry 2016 http://dx.doi.org/10.1039/C6RA19471K A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. ABSTRACT: The methanol-to-hydrocarbon (MTH) reaction received considerable attention as utilizing renewable sources of both value-added chemicals and fuels becomes number one priority for the society. Here, for the first time we report the development of hierarchical zeolites (ZSM-5) containing both iron oxide and nickel oxide nanoparticles. Modifying the iron oxide (magnetite, Fe3O4) amounts, we are able to control the catalyst activity and the product distribution in the MTH process. At the medium Fe3O4 loading, the major fraction is composed of the C9-C11 hydrocarbons (gasoline fraction). At the higher Fe3O4 loading, the C1-C4 hydrocarbons prevail in the reaction mixture, while at the lowest magnetite loading the major component is the C5-C8 hydrocarbons. Addition of Ni species to Fe3O4-ZSM-5 leads to the formation of mixed Ni oxides (NiO/Ni2O3) positioned either on top or next to Fe3O4 nanoparticles. This modification allowed us to significantly improve the catalyst stability due to diminishing coke formation and disordering of the coke formed. The incorporation of Ni oxide species also leads to a higher catalyst activity (up to 9.3 g(Methanol)/(g(ZSM-5)×h) and an improved selectivity (11.3% of the C5-C8 hydrocarbons and 23.6% of the C9-C11 hydrocarbons), making these zeolites highly promising for industrial applications.

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Section: Introductionmentioning

confidence: 97%

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

et al. 2016

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“…In order to enhance the light olefins yield over ZSM‐5, various approaches have been employed. For instance, post‐synthesis modifications were used to increase the steric constraints and to achieve a favorable density and strength of Brønsted acid sites . In the early study of Chang et al.…”

Section: Introductionmentioning

confidence: 99%

Tuning Zeolite Properties for a Highly Efficient Synthesis of Propylene from Methanol

Palčić

Ordomsky

Qin

et al. 2018

Chemistry A European J

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A series of nanosized ZSM-5 samples was synthesized at 170, 150, 120, and 100 °C. Experimental data show that the decrease of crystallization temperature leads to significant changes in zeolite properties. Crystals synthesized at 100 °C exhibit many framework defects with lower acid-site density, strength, and a larger external surface area. The selectivity to light olefins and the propylene-to-ethylene ratio increases as the crystallization temperature decreases. A propylene-to-ethylene ratio of above 6 with the highest selectivity to propylene of 53 % was obtained over ZSM-5 catalyst prepared at 100 °C. The stability of the nanosized zeolite in methanol to olefins (MTO) was also improved compared to the industrial sample with a similar Si/Al ratio. This catalytic performance is a result of the decrease in the acid-site density, strength, and the crystals' size, providing a shorter diffusion path and larger external surface area. The presence of structural defects and a different external surface in the crystals has been shown to play an important role in the MTO catalyst performance.

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“…Due to the fact that these reactions usually take place at or near 300°C, alkenes are formed. One particular study by Zhang [83] clearly shows this concept of using the HZSM-5 catalyst at 520°C to transform methanol to olefins. On solid acids of sufficient strength, secondary olefin reactions also take place where propene may trimerize and then crack into butenes and pentenes [84].…”

Section: Equation 17mentioning

confidence: 95%

Production of high-value products including gasoline hydrocarbons from the thermochemical conversion of syngas

Street

Yu²

2011

Biofuels

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This article reviews subjects dealing with the chemistry, catalytic poisoning, newer catalyst technologies and possible future solutions to increase the efficiency of creating high-value products by thermochemically converting gasified biomass (producer gas). This article puts emphasis on bi-functional catalysts containing transition metals coupled with zeolites for renewable-fuel production. High-value products such as gasolinerange hydrocarbons, dimethyl ether, aldehydes, isobutane, isobutene and other olefins can be produced with gasified biomass due to the gas containing syngas (H 2 + CO). The chemistry and production of these chemicals are discussed in this article. The importance of certain process variables, such as temperature, space velocity, gas ratios, and pressure are discussed along with the importance of reactor design. The subject of the importance of the cleanliness of the producer gas, so that maximum high-value product yield can be achieved with the greatest efficiency, is also discussed.

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Methanol to Olefin over Ca-Modified HZSM-5 Zeolites

Cited by 48 publications

References 20 publications

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

Tuning Zeolite Properties for a Highly Efficient Synthesis of Propylene from Methanol

Production of high-value products including gasoline hydrocarbons from the thermochemical conversion of syngas

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