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Fundamental study of the photocatalytic reduction of CO2: A short review of thermodynamics, kinetics and mechanisms

Gandhi Romil, Moses Aashish, Baral Saroj Sundar

Chemical and Process Engineering

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2022

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Vol. 43, nr 2

223-–228

EN

On the off chance that methods which reduce the global CO2 content are unavailable and inefficient, the increasing CO2 levels will lead to a synchronized rise in temperature across the world. The conversion of this abundant CO2 into hydrocarbons like CH4, CH3OH, CO, HCOOH and hydrogen fuel using different techniques and their use for power could assist with the world’s energy deficiency and solve the CO2 reduction-energy nexus. In this study, photocatalytic CO2 conversion by sunlight will be of primary focus since this bears a resemblance with the regular photosynthesis phenomenon. This work also portrays the writings that have narrated the development of mixtures of two or more carbon ions (C2 ̧) within the photocatalytic reduction of CO2. This paper thus comprises the energy required for CO2 photoreduction, the kinetics mechanisms and thermodynamics requirements. The reaction of CO with water and the hydrogenation of CO2 are covered to understand the gap of Gibb’s free energy between both of the reactions. Likewise, the summary of different metal-based co-catalysts, metal-free co-catalysts and their selectivity towards CO2 reduction by photocatalysis and reduction of CO2 into various hydrocarbons, fuel and materials have also been examined.

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Modelirovanie rezonansnogo volnovogo vozdejstvia na gazokondensatnuu sistemu s ispol'zovaniem metodov teorii podobia

Majkov I. L., Zajcenko V. M., Torcinskij V. M., Ukrainskij L. E.

Prace Instytutu Nafty i Gazu

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2009

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nr 162

80-84

EN

The wave technologies of influence on multiphase systems can find application for an intensification of hydrocarbon production technological processes, including increase gas and condensate recovery. By means of cyclic wave influences, it is possible to change hydrodynamic and thermodynamic properties of mass transfer process in a gas-condensate stratum and promote increase in an output of gas and condensate. A series of experimental and theoretical works on modeling of mass transfer processes in two phase system (a mixture methane-n-butane) at conditions (pressure and temperature) of real gas-condensate stratums is carried out. Numerical model of a two-phase filtration of hydrocarbon mixtures in a porous medium for modeling of acoustic waves influence is developed. Similarity parameters of process are received, resonance frequencies and the amplitudes of the wave influence providing minimal time of a condensate plug destruction are found.

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Intensifikacia i tehnologiceskie meropriatia po stabilizacii dobyci uglevodorov na pozdnih stadiah razrabotki mestorozdenij so sloznoizvlekaemymi zapasami Cernigovskogo neftegazopromyslovogo rajona

Poltorackaa L. N., Spak O. P., Spak P. I.

Prace Instytutu Nafty i Gazu

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2006

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nr 137

957-963

EN

Chernigov's area is situated in the north of Ukraine, the general territory - 31,9 thousand km2. The perspective oil-and-gas-bearing area makes approximately 20 thousand km2. There are 23 oil and gas fields discovered in the region. Deposits, which have entered in a late development stage, are characterized by difficult geological and physical producing conditions. For stabilization and volume's accretion of hydrocarbons production application of methods on an inflow's intensification and other technological actions is necessary. In this direction, the big and positive enough experience has an oil-and-gas production department (OGPD) "Chernigovneftegas". Annually OGPD receives about 5-15% of oil production. In 2005, 89 different actions on inflows intensification were taken, new wells were put in operation and other technological actions have been lead. As a result additiona185 thousand t. oil, 3,3 million m3 gas and 500 t. condensate were mined.