The joint reaction of methanol and i-butane over the HZSM-5 zeolite

Roohollahi, Gholamreza; Kazemeini, Mohammad; Mohammadrezaee, Alireza; Golhosseini, Reza

doi:10.1016/j.jiec.2012.10.032

Cited by 10 publications

(3 citation statements)

References 26 publications

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“…Samples with different Si/Al ratios (see Table ) indicated that a Si/Al ratio of 150 is suitable for total hydrocarbon products. The higher yield of liquid products at lower acid concentration might be due to the lower cracking rates . The large excess of Brønsted acid sites in catalysts with higher Si/Al ratios can convert light olefins to aromatic compounds and paraffins.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Reaction using methanol and hydrocarbons combines endothermic hydrocarbon cracking and the exothermic conversion of methanol to olefins. , This route couples the two individual reactions. , Cofeeding of methanol and n -butane over the HZSM-5 was also investigated. ,, Decreasing the thermal decomposition of methanol decreased the yields of unwanted products such as CO, CO 2 , and methane. An energy-neutral processes can be achieved by selecting a proper methanol/ n -butane ratio.…”

Section: Introductionmentioning

confidence: 99%

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Highly Effective Transformation of Methanol and RFCC Gas to Propylene and Paraxylene with Tungsten Hydride and Cerium Oxide Comodified HZSM-5 Zeolite

Cui

Wang

et al. 2015

Ind. Eng. Chem. Res.

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HZSM-5 zeolite was comodified with tungsten hydride and cerium oxide. A fixed-bed reactor was used to investigate the performance of the resulting catalysts in the transformation of methanol and residual fluid catalytic cracking (RFCC) gas to propylene and paraxylene. The resultant samples were characterized using the XRD, SEM, and BET techniques. X-ray diffraction analysis indicated the coexistence of WH x and CeO2 in the catalysts. Only at suitable methanol/RFCC gas ratios could relatively good propylene and aromatics yields be obtained. Addition of RFCC gas to methanol inhibits dry gas production while promoting the production of propylene and paraxylene and decreases the consumption of water. The methanol conversion, the propylene yield, and the paraxylene yield reached 100%, 69.5%, and 20.0%, respectively, under suitable conditions of a silica/alumina ratio of 150, a reaction temperature of 743 K, a space velocity of 10 h–1, and an RFCC gas content of 9%.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Effective Transformation of Methanol and RFCC Gas to Propylene and Paraxylene with Tungsten Hydride and Cerium Oxide Comodified HZSM-5 Zeolite

Cui

Wang

et al. 2015

Ind. Eng. Chem. Res.

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show abstract

“…The combined reactions of paraffins and methanol were studied aiming for the intensification of propylene in the methanol-to-propylene (MTP) process. A significant enhancement of its yield was reported by co-feeding i-butane at 470-500 ºC and full conversion of methanol [14]. Likewise, a positive synergy was found when the C4-6 hydrocarbon byproducts were recirculated in the MTO process [15].…”

Section: Introductionmentioning

confidence: 93%