Novel zeolite catalysis to create value from surplus aromatics: preparation of C2+-n-alkanes, a high-quality synthetic steamcracker feedstock

Weitkamp, Jens; Raichle, Andreas; Traa, Yvonne

doi:10.1016/s0926-860x(01)00841-9

Cited by 43 publications

(31 citation statements)

References 28 publications

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“…During the hydrocracking of methylcyclohexane on a similar Pd/H-ZSM-5 catalyst at 400°C [25], but at much higher hydrogen pressure of 60 bar (resulting in complete conversion), similar products were observed, however with a lower contribution of methane and higher amounts of propane compared to the results presented here. However, due to the lower temperature, the low conversion and the lower hydrogen pressure applied here (compared to [25]) the catalyst is not active for hydrocracking at low contact times. However, with increasing conversion, more hydrogen is available for such secondary reactions and has a chance to undergo secondary reactions.…”

Section: Resultssupporting

confidence: 76%

Selectivity Enhancement to the Exclusive Formation of Ethyltoluenes and Hydrogen During Dehydroalkylation of Toluene with Ethane

2007

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The dehydroalkylation of toluene with ethane to the isomeric ethyltoluenes was studied on 0.4Pt/H-ZSM-5 at varying contact times (1/WHSV). At a high contact time of 1.0 h, toluene disproportionation and hydrogenolysis reactions dominate, resulting in low selectivity to the desired ethyltoluenes via the alkylation reaction. However, at a low contact time of 0.12 h side reactions are eliminated, resulting in maximum selectivities to the kinetically favored ethyltoluenes and hydrogen. Results at high selectivities to ethyltoluenes provide significant insight into reaction pathways.

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Section: Resultssupporting

confidence: 76%

Selectivity Enhancement to the Exclusive Formation of Ethyltoluenes and Hydrogen During Dehydroalkylation of Toluene with Ethane

2007

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“…n-alkanes selectivity (around 72.8%) when Pd-supported H-ZSM-5 is used under similar conditions of reaction [5]. In that work [5], the C 2?…”

Section: Catalytic Testing Resultsmentioning

confidence: 90%

“…n-alkanes selectivity (around 72.8%) when Pd-supported H-ZSM-5 is used under similar conditions of reaction [5]. In that work [5], the C 2? n-alkanes selectivity was 90.3% for benzene feed, 90.2% for ethylbenzene, 80.8% in the case of using trimethylbenzene, and 72.8% when toluene was used as feed for the test.…”

Section: Catalytic Testing Resultsmentioning

confidence: 90%

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High Performance Ni Based Catalyst for Toluene Hydrocracking

et al. 2009

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The one step hydrocracking of toluene to n-paraffins was successfully carried out using a Ni-based bifunctional catalyst supported on H-ZSM-5 zeolite. Two methods of catalyst preparation were compared and a quantifiable difference in selectivity was identified depending on the preparation method. Additionally, a high C 2? n-alkane selectivity of *75% was obtained with both catalysts, which is comparable to previous work using Pd. Both catalysts generated a toluene conversion of 100%.

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“…Researchers [8] reported on a polyfunctional metal catalyst for benzene production from pygas through hydrodealkylation, hydrocracking and hydrodesulfurization. On the other hand, other groups [9][10][11] proposed a conversion of pygas into a steamcracker feedstock consisting mainly of ethane, propane and n-butane as an economical solution for upgrading pygas, instead of producing BTX aromatics from pygas. In the present work, we presented an advanced pygas upgrading (APU SM ) technology that produces BTX and LPG from pygas using metal promoted zeolite catalyst.…”

Section: Introductionmentioning

confidence: 99%

APUSM technology for the production of BTX and LPG from pyrolysis gasoline using metal promoted zeolite catalyst

Choi

Kim

et al. 2006

Catal Surv Asia

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SK Corporation developed an advanced pyrolysis gasoline (pygas) upgrading (APU SM ) technology based on a catalytic process for producing valuable benzene, toluene and xylenes (BTX) and liquefied petroleum gas (LPG) from pygas containing aromatics and non-aromatic hydrocarbons. Hydrodealkylation of heavy aromatics and hydrocracking of non-aromatic hydrocarbons occurred with facility in the conversion of pygas over a proprietary catalyst, metal promoted zeolite. This catalytic process produced benzene and toluene with high purity corresponding to chemical grade while giving mixed xylenes with reduced ethylbenzene. In the present study, we described novel features of the APU SM technology in terms of the process and catalyst. The influence of the process conditions was also examined. This technology has been commercially proven, and hence is available for licensing through Axens, which is a major engineering and licensing company.

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Novel zeolite catalysis to create value from surplus aromatics: preparation of C2+-n-alkanes, a high-quality synthetic steamcracker feedstock

Cited by 43 publications

References 28 publications

Selectivity Enhancement to the Exclusive Formation of Ethyltoluenes and Hydrogen During Dehydroalkylation of Toluene with Ethane

Selectivity Enhancement to the Exclusive Formation of Ethyltoluenes and Hydrogen During Dehydroalkylation of Toluene with Ethane

High Performance Ni Based Catalyst for Toluene Hydrocracking

APUSM technology for the production of BTX and LPG from pyrolysis gasoline using metal promoted zeolite catalyst

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