Kinetics of the gas-phase thermal chlorination of methane

Rozanov, V. N.; Treger, Yu. A.

doi:10.1134/s0023158410050034

Cited by 14 publications

(12 citation statements)

References 16 publications

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“…Arai et al [31] prepared an extensive study of gas phase thermal chlorination with first order rate equations with respect to chlorine and methane. Some differences between their results and the results of Rozanov and Treger [32] triggered a study by the latter who obtained considerable experimental data for laboratory, pilot plant, and industrial conditions. They studied thermal chlorination of methane and its kinetics in the gas-phase.…”

Section: Of 31mentioning

confidence: 89%

A Review of Methane Activation Reactions by Halogenation: Catalysis, Mechanism, Kinetics, Modeling, and Reactors

et al. 2020

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Methane is the central component of natural gas, which is globally one of the most abundant feedstocks. Due to its strong C–H bond, methane activation is difficult, and its conversion into value-added chemicals and fuels has therefore been the pot of gold in the industry and academia for many years. Industrially, halogenation of methane is one of the most promising methane conversion routes, which is why this paper presents a comprehensive review of the literature on methane activation by halogenation. Homogeneous gas phase reactions and their pertinent reaction mechanisms and kinetics are presented as well as microkinetic models for methane reaction with chlorine, bromine, and iodine. The catalysts for non-oxidative and oxidative catalytic halogenation were reviewed for their activity and selectivity as well as their catalytic action. The highly reactive products of methane halogenation reactions are often converted to other chemicals in the same process, and these multi-step processes were reviewed in a separate section. Recent advances in the available computational power have made the use of the ab initio calculations (such as density functional theory) routine, allowing for in silico calculations of energy profiles, which include all stable intermediates and the transition states linking them. The available literature on this subject is presented. Lastly, green processes and the production of fuels as well as some unconventional methods for methane activation using ultrasound, plasma, superacids, and light are also reviewed.

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Section: Of 31mentioning

confidence: 89%

A Review of Methane Activation Reactions by Halogenation: Catalysis, Mechanism, Kinetics, Modeling, and Reactors

et al. 2020

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“…Industrial use of this process will not only eliminate the expensive air separation plants, but as well produce far less greenhouse gases. Gas phase thermal oxidation [27,28] and catalytic oxidative methanation [29] process are suitable for industrial application. The proposed process is based on elimination of need for air separation for oxygen production, hence the gas phase thermal chlorination is selected.…”

Section: Production Of Chloromethanesmentioning

confidence: 99%

“…Methane chlorination is a radical reaction characterised by poor selectivity [27], forming a products stream consisting of equilibrium concentration of all the chloromethanes as shown in One way to influence the product ratios is to control the moles of chlorine used and the process conditions. It has been reported that, except for reaction 2.4, the products will contain all the chloromethanes [6,27,30,31]. The process conditions chosen to maximize the proportions of di-and tri-chloromethanes were as reported by Rozanov and Treger [27].…”

Section: Production Of Chloromethanesmentioning

confidence: 99%

“…It has been reported that, except for reaction 2.4, the products will contain all the chloromethanes [6,27,30,31]. The process conditions chosen to maximize the proportions of di-and tri-chloromethanes were as reported by Rozanov and Treger [27]. Methyl chloride was separated from the products and recycled with unreacted methane.…”

Section: Production Of Chloromethanesmentioning

confidence: 99%

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Industrial Feasiblity of Direct Methane Conversion to Hydrocarbons over Fe-Based Fischer Tropsch Catalyst

Rabiu¹,

Yusuf²

2013

JPEE

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Recently, as a direct consequence of the dwindling world oil reserves and the growing awareness of the environmental problems associated with the use of coal as energy source, there is growing interest in cheaper, abundant and cleaner burning methane. The Gas-to-Liquid technology offers perhaps the most attractive routes for the exploitation of the world huge and growing natural gas resources. Using this process the erstwhile stranded gas is converted to premium grade liquid fuels and chemicals that are easily transported. However, a widespread application of the GTL process is being hampered by economical and technical challenges. The high cost of synthesis gas, for instance, weighs heavily on the economics and competitiveness of the process limiting its wider application. This work presented a modified Gas-to-Liquid process that eliminates the costly synthesis gas production step. The proposed process utilized an alternative pathway for methane activation via the production of chloromethane derivatives which are then converted to hydrocarbons. It established that hydrocarbons mainly olefins can be economically produced from di-and tri-chloromethanes over a typical iron-based Fischer Tropsch catalysts in a moving bed reactor at industrially relevant conditions. Some of the attractions of the proposed process include a) the elimination of the costly air separation plant requirement b) high process selectivity and c) significant reduction of carbon dioxide emissions thereby saving on feedstock loss and the costly CO 2 removal and isolation processes.

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“…Chloromethane (CH 3 Cl) has been regarded as a substitute for naphtha as a raw material for light olefins [1][2][3][4][5] and used as methylating or chlorinating agent to produce methyl cellulose, silicones and rubber. [6,7] This compound has often been synthesized from chlorination of methane as the following reaction (1).…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Catalytic Dechlorination of Dichloromethane to Chloromethane over Al−Ti Mixed Oxide Catalysts

et al. 2020

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In this paper, a series of AlÀ Ti mixed oxides with different Al/Ti ratios are prepared by a simple sol-gel method and they are used as active catalysts for selective dechlorination of dichloromethane to chloromethane. The AlÀ Ti mixed oxide catalyst with the same molar ratio of Al and Ti shows the highest activity in dechlorination of dichloromethane. The strong and abundant Lewis acid sites in the AlÀ Ti mixed oxides formed along with AlÀ OÀ Ti bondings are responsible for the high catalytic activity toward the selective dechlorination reaction in this work. From a kinetic study, the activation energy of this reaction over the optimum AlÀ Ti mixed oxide catalyst appears to be 59.4 kJ mol À 1 based on Langmuir-Hinshelwood model. The improved catalytic performance suggests that the AlÀ Ti mixed oxide could be used as the effective catalyst for the highly selective dechlorination of dichloromethane to chloromethane.

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Kinetics of the gas-phase thermal chlorination of methane

Cited by 14 publications

References 16 publications

A Review of Methane Activation Reactions by Halogenation: Catalysis, Mechanism, Kinetics, Modeling, and Reactors

A Review of Methane Activation Reactions by Halogenation: Catalysis, Mechanism, Kinetics, Modeling, and Reactors

Industrial Feasiblity of Direct Methane Conversion to Hydrocarbons over Fe-Based Fischer Tropsch Catalyst

Highly Selective Catalytic Dechlorination of Dichloromethane to Chloromethane over Al−Ti Mixed Oxide Catalysts

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