Partial Oxidation of Ethanol Using VOx/SBA-15 and VOx/Fumed Silica Catalysts in a Bench-scale Stainless Steel Reactor

Two VOx/SBA-15 catalysts and three VOx/SiO2-fumed silica, with 5, 10 and 1, 5, 10 %wt. vanadium content respectively, were tested in a stainless steel continuous flow reactor for the partial oxidation of ethanol. The catalysts were tested at 150 – 300 °C. Products were analyzed by GC-FID, GC-OFID and GC-MS. The aim was exploring the problematics which could be found when more industrial close conditions are used. The total conversion of ethanol and selectivity to acetaldehyde were different than the expected ones. For VOx/SiO2-fumed silica, the total conversion was higher with a lower selectivity to acetaldehyde compared to VOx/SBA-15 catalysts.

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Highly Active Catalysts for the Dehydration of Isopropanol

Catalysts ◽

10.3390/catal10060719 ◽

2020 ◽

Vol 10 (6) ◽

pp. 719

Author(s):

Martyna Murat ◽

Zdeněk Tišler ◽

Josef Šimek ◽

José M. Hidalgo-Herrador

Keyword(s):

Raman Spectroscopy ◽

Pore Size ◽

Continuous Flow ◽

Flow Reactor ◽

Active Catalyst ◽

Vanadium Content ◽

Gas Chromatograph ◽

Highly Active ◽

Continuous Flow Reactor ◽

Propylene Selectivity

Due to the high costs and low selectivity associated with the production of propylene, new routes for its synthesis are being sought. Dehydration has been widely investigated in this field, but, thus far, no study has produced efficient results for isopropanol. Vanadium-zirconia catalysts have been shown to be effective for the dehydration of ethanol. Therefore, we investigated the activity of such catalysts in the dehydration of isopropanol. The catalysts were synthetized on a SBA-15 base, supplemented with zirconia or combined zirconia and vanadium. Tests were conducted in a continuous flow reactor at 150–300 °C. Samples were analyzed using a gas chromatograph. The most active catalyst showed 96% conversion with 100% selectivity to propylene. XRD, SEM and Raman spectroscopy analyses revealed that as the vanadium content increases, the pore size of the catalyst decreases and both isopropanol conversion and propylene selectivity are reduced. Thus, without the addition of vanadium, the Zr-SBA-15 catalyst appears to be suitable for the dehydration of isopropanol to propylene.

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Low temperature catalytic partial oxidation of ethane to oxygenates by Fe– and Cu–ZSM-5 in a continuous flow reactor

Journal of Catalysis ◽

10.1016/j.jcat.2015.07.001 ◽

2015 ◽

Vol 330 ◽

pp. 84-92 ◽

Cited By ~ 15

Author(s):

Robert D. Armstrong ◽

Simon J. Freakley ◽

Michael M. Forde ◽

Virginie Peneau ◽

Robert L. Jenkins ◽

...

Keyword(s):

Low Temperature ◽

Partial Oxidation ◽

Continuous Flow ◽

Flow Reactor ◽

Catalytic Partial Oxidation ◽

Continuous Flow Reactor

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Renewable Energy from Agricultural Waste

Revista de Chimie ◽

10.37358/rc.18.6.6325 ◽

2018 ◽

Vol 69 (6) ◽

pp. 1363-1366 ◽

Cited By ~ 1

Author(s):

Stefania Daniela Bran ◽

Petre Chipurici ◽

Mariana Bran ◽

Alexandru Vlaicu

Keyword(s):

Saccharomyces Cerevisiae ◽

Gas Chromatography ◽

Continuous Flow ◽

Laboratory Experiments ◽

Fermentation Process ◽

Flow Reactor ◽

Agricultural Waste ◽

Continuous Flow Reactor ◽

Natural Support ◽

Co2 Flow

This paper has aimed at evaluating the concentration of bioethanol obtained using sunflower stem as natural support, molasses as carbon source and Saccharomyces cerevisiae yeast in a continuous flow reactor. The natural support was tested to investigate the immobilization/growth of S. cerevisiae yeast. The concentration of bioethanol produced by fermentation was analyzed by gas chromatography using two methods: aqueous solutions and extraction in organic phase. The CO2 flow obtained during the fermentation process was considered to estimate when the yeast was deactivated. The laboratory experiments have highlighted that the use of plant-based wastes to bioconversion in ethanol could be a non-pollutant and sustainable alternative.

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