Oxidative conversion of light alkanes diluted by nitrogen, helium or methane

Arutyunov, V. S.; Magomedov, R. N.; Proshina, A. Yu.; Strekova, L. N.

doi:10.1016/j.cej.2013.10.009

Cited by 29 publications

(21 citation statements)

References 13 publications

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“…Thus, at 43% propane conversion, the selectivity of its conversion into propylene reached 38 mol %, and the total selectivity of the formation of propylene and ethylene was 75 mol % [9]. In recent studies on the oxidative conversion of light alkanes С 2 -С 5 , including in the presence of a large excess of methane [10][11][12][13] under slightly different experimen tal conditions, the results were generally in good agreement with the results of [6,8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of oxygen concentration on the oxidative conversion of propane

Pogosyan

Arsentiev

et al. 2015

Russ. J. Phys. Chem. B

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The influence of the initial concentration of oxygen and temperature on the oxidative conversion of propane in a two sectional flow reactor at constant pressure and contact time was studied. It was shown that an increase in the initial concentration of oxygen not only increases the conversion of propane, but also affects the ratio of the reaction products. The yield of ethylene and propylene was found to depend on the initial propane to oxygen ratio and reaction temperature.

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Section: Introductionmentioning

confidence: 99%

Effect of oxygen concentration on the oxidative conversion of propane

Pogosyan

Arsentiev

et al. 2015

Russ. J. Phys. Chem. B

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“…Moreover, the methane content even increases, since it is one of the main products of oxycracking of its heavier homologues [11,14,20]. The main products of the oxycracking of methane homologues are ethylene, methane, ethane, hydrogen, and carbon monoxide, with ethane and propylene being present in small amounts [17,[20][21][22]. The presence of a heterogeneous catalyst significantly accelerates the process at low temperatures, but impedes it at higher temperatures, at which an abrupt transition to the branched-chain-reaction mode occurs.…”

Section: Selective Oxycracking Of Heavier Components Of Natural Gasmentioning

confidence: 99%

“…Oxygen addition markedly increases the rate of conversion of alkanes, particularly at moderate temperatures: above the temperature of the surface catalytic process but below the thermal pyrolysis temperature [17] (Fig. 8).…”

Section: Selective Oxycracking Of Heavier Components Of Natural Gasmentioning

confidence: 99%

“…The conversion of heavy components of natural gas into lighter, higher-octane compounds less prone to detonation and soot formation makes it possible to use thus processed gas as a fuel for gas-piston and gas-turbine engines [11]. This technology [16,17] is based on the simple fact that the temperature of the gas-phase oxidative conversion of gaseous methane homologues is substantially below the temperature of oxidative methane conversion (Fig. 7), which, under these conditions, exceed 1000 °C [18,19].…”

Section: Selective Oxycracking Of Heavier Components Of Natural Gasmentioning

confidence: 99%

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Partial Oxidation of Light Alkanes as a Base of New Generation of Gas Chemical Processes

2013

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Recent developments in unconventional natural gas production increase the need for principally new small-scale technologies for gas processing and transportation. The promising way for small-scale gas processing is its autothermal partial oxidation to syngas or direct partial oxidation to chemicals. The paper considers some prospective gas chemical processes based on the partial oxidation of light alkanes. Among them are the conversion of natural gas to syngas in volumetric (3D) matrix burners made of a gas permeable material and direct conversion of methane to methanol without its preliminary conversion to syngas (DMTM). As a more simple technology that lets to use fat associated oil gas often flaring in remote sites, it can be suggested the selective oxidative cracking of heavier components of natural gas. This process converts heavy methane homologues from propane to pentane and heavier into ethylene, methane, ethane, hydrogen, and carbon monoxide, thus increasing methane index (octane number) of gas and making it suitable for feeding modern gas piston and gas turbine power engines. One more interesting prospect is the creation of technologies making use of the subsequent processing of valuable oxycracking products, such as olefins, CO, and hydrogen, for example, by their catalytic co-polymerization without preliminary separation from gas phase. The co-polymerization of CO and ethylene, followed by the separation of resulting liquid products, can considerably improve the economic attractiveness of the oxycracing process. Thus, despite the absence of economically proved and industrial-scale tested smallcapacity direct and indirect gas chemical technologies, intensive efforts to develop such alternative technologies let to expect near bright future for them.

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“…However, existing technologies of separation of heavier hydrocarbons from APG at its annual flows less than 20 million m 3 that are typical for its smallscale sources, are unprofitable. Therefore, we have developed new technology, based on the selective oxy-cracking of heavier components of APG at its oxidative conversion with small admission of air [8]. Pilot plant testing has shown that the selective oxy-cracking let to convert up to 90% of C 5 + hydrocarbons (Fig.…”

Section: New Possibilities For Using Apg In Power Generationmentioning

confidence: 99%

New Potentialities for Utilization of Associated Petroleum Gases in Power Generation and Chemicals Production

Arutyunov

Савченко

Седов

et al. 2017

Eurasian Chem. Tech. J.

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New possibilities for the utilization of associated petroleum gases (APG) and monetization of small-scale and remote Natural Gas resources by power generation and chemicals production are considered and tested. One possibility is the oxycracking of APG. This technology allows selective transformation of heavier hydrocarbons that have low octane (methane) numbers and inclined to soot and tar formation, into lighter compounds with higher octane numbers, thus producing gas suitable to feed different types of power engines. Another possibility is the small-scale conversion of APG to syngas to produce more easily transportable and more valuable chemicals or liquid fuels via well-known Fischer-Tropsch process or catalytic synthesis of methanol. For this purpose we have suggested principally new technology for natural gases conversion into syngas, based on the use of 3D (volumetric) matrixes. It allows the relative simple and very compact non-catalytic reformers to be designed for small-scale gas-to liquid (GTL) technologies. Their main advantages are autothermal character of the process without any need in additional heating or power supply, absence of catalyst that allows processing hydrocarbon gases of practically any composition, including APG, without additional pretreatment, very high specific volume capacity, at any rate 10 times higher than that of steam reforming, and simplicity in construction and operation.

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Oxidative conversion of light alkanes diluted by nitrogen, helium or methane

Cited by 29 publications

References 13 publications

Effect of oxygen concentration on the oxidative conversion of propane

Effect of oxygen concentration on the oxidative conversion of propane

Partial Oxidation of Light Alkanes as a Base of New Generation of Gas Chemical Processes

New Potentialities for Utilization of Associated Petroleum Gases in Power Generation and Chemicals Production

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