On the formation of C3 hydrocarbons during the conversion of ethanol using H-ZSM-5 catalyst

Ingram, Conrad; Lancashire, Robert J.

doi:10.1007/bf00808603

Cited by 31 publications

(18 citation statements)

References 10 publications

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“…In contrast, was also purchased from Zeolyst Co., Ltd. γ-Al2O3, ethanol can be produced only from biomass. Earlier 5( N H4)2O・12W O3・5H2O , ( N H4)6M o7O24・4H2O , studies 6), 7) have revealed that saturated hydrocarbons N H4R e O4, L a ( N O3)3・6H2O , ( N H4)3P O4・3H2O , such as propane are the major products with aromatics (NH4)2O・5B2O3 ・8H2O and Mg(NO3)2 ・6H2O were purover unmodified H-ZSM5, and Zn-and Ga-doping lead chased from Wako Pure Chemical Industries, Ltd. and to increased selectivity for aromatics 8) . By analogy Soekawa Chemicals, Japan.…”

Section: Methodsmentioning

confidence: 99%

Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

和久

仁

功

2008

J. Jpn. Petrol. Inst.

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Various H-ZSM-5 catalysts were assessed for ethanol conversion into lower olefins. Ethanol was converted to lower olefins over H-ZSM-5 catalyst without modification. The selectivities for ethylene and propylene were much lower than those for aromatics such as benzene, toluene, and xylene (BTX), and C1-C4 saturated hydrocarbons. Addition of W and La was found to reduce aromatization and olefin hydrogenation, and, under ethanol conversion of almost 100％ , the selectivity for propylene and ethylene was improved, whereas the selectivity for BTX was decreased. The amount of carbon deposit was almost the same as that without modification. The selectivity for propylene formation may be associated with the percentage of Brønsted acid sites on the catalyst surface.

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Section: Methodsmentioning

confidence: 99%

Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

和久

仁

功

2008

J. Jpn. Petrol. Inst.

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“…C 3 , C 4 species are formed in significant amount over Fe/La/H-ZSM-5 catalysts, at a high temperature As a result of a parallel formation of propene or butenes, a significant hydrogen transfer activity takes place between them resulting in the saturation of propene or butenes while ethylene played a less significant role. Ingram et al studied the conversion of bioethanol to C 3 hydrocarbons and observed the formation of C 4 species; as the reaction temperature was increased, C 4 was further polymerized to higher olefins, some of which were cracked into C 3 species [18]. Behind theoretical and experimental studies, the authors are going to test this set of catalysts in the conversion of bioethanol to hydrocarbons.…”

Section: Discussionmentioning

confidence: 99%

Metal impregnated catalysts for bioethanol conversion tested by n-hexane cracking

Proscanu

Matei

Ganea³

et al. 2012

Analele Universitatii "Ovidius" Constanta - Seria Chimie

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The catalytic activity of catalysts for bioethanol conversion to hydrocarbons was tested by cracking nhexane in a glass microreactor in the temperature range of 623 to 823K. The microreactor is a tubular one with axial thermocuple measurements in flow, initially for some experiments in nitrogen and for others by hydrogen. Reaction products were collected and analyzed as gaseous samples by Gas Chromatography. The samples of Me-ZSM-5 zeolites (Me=Fe, La, Ce) were prepared by impregnation method. All the prepared samples had a metal content of approximate to 3 % wt. ZSM-5 zeolite was synthesized by using a structure direct agent, namely tetrapropylammonium hydroxide (TPAOH) and hydrothermal crystallisation method under alkaline conditions according to reported procedures.

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“…Especially, ethylene is easily produced by a dehydration of ethanol and, therefore, this process has already been established. Earlier study has revealed that propylene is formed by the cracking of larger olefins over H-ZSM-5 [10]. However, there are few reports on a direct conversion of bio-ethanol into propylene.…”

Section: Introductionmentioning

confidence: 97%

Conversion of Ethanol to Propylene by H-ZSM-5 with Si/Al2 Ratio of 280

et al. 2010

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A catalytic conversion of ethanol to propylene was carried out by use of H-ZSM-5 with Si/Al 2 ratio of 280. In H-ZSM-5 modified at a molar ratio of La to Al 2 of 2.2, the propylene selectivity was 31% at 0.1 MPa, 550°C and was higher than those of non-modified and other metal modified catalysts. In the La-modified H-ZSM-5, a rapid increase in ethylene formation was also depressed and the propylene selectivity was still high (24%) even after 28 hreaction.

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On the formation of C3 hydrocarbons during the conversion of ethanol using H-ZSM-5 catalyst

Cited by 31 publications

References 10 publications

Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

Metal impregnated catalysts for bioethanol conversion tested by n-hexane cracking

Conversion of Ethanol to Propylene by H-ZSM-5 with Si/Al2 Ratio of 280

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