scholarly journals Modeling Kinetics of CO2 (Carbon Dioxide) Mineral Sequestration in Heterogeneous Aqueous Suspensions Systems of Cement Dust

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Henryk Świnder ◽  
Marcin Michalak ◽  
Alicja Uliasz-Bocheńczyk
Keyword(s):  
Carbon Dioxide ◽  
Cement Dust ◽  
Mineral Sequestration ◽  
Aqueous Suspensions ◽  
Kinetics Of

Kinetics of temperature-programmed reactivation of a hydrodesulphurization catalyst

1983 ◽  
Vol 48 (12) ◽  
pp. 3340-3355 ◽  
Author(s):  
Pavel Fott ◽  
Pavel Šebesta
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Thin Layer ◽  
Kinetic Parameters ◽  
Diffusion Region ◽  
Reaction Heat ◽  
Gaseous Products ◽  
Temperature Programmed ◽  
Kinetics Of

The kinetic parameters of reactivation of a carbonized hydrodesulphurization (HDS) catalyst by air were evaluated from combined thermogravimetric (TG) and differential thermal analysis (DTA) data. In addition, the gaseous products leaving a temperature-programmed reactor with a thin layer of catalyst were analyzed chromatographically. Two exothermic processes were found to take part in the reactivation, and their kinetics were described by 1st order equations. In the first process (180-400 °C), sulphur in Co and Mo sulphides is oxidized to sulphur dioxide; in the second process (300-540 °C), in which the essential portion of heat is produced, the deposited carbon is oxidized to give predominantly carbon dioxide. If the reaction heat is not removed efficiently enough, ignition of the catalyst takes place, which is associated with a transition to the diffusion region. The application of the obtained kinetic parameters to modelling a temperature-programmed reactivation is illustrated on the case of a single particle.

scholarly journals Investigation and Possibilities of Reuse of Carbon Dioxide Absorbent Used in Anesthesiology

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5052
Author(s):  
Bartłomiej Rogalewicz ◽  
Agnieszka Czylkowska ◽  
Piotr Anielak ◽  
Paweł Samulkiewicz
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
Powder Diffraction ◽  
Soda Lime ◽  
Closed Circuit ◽  
Carbon Dioxide Absorption ◽  
X Ray ◽  
Kinetics Of ◽  
Carbon Dioxide Absorbent

Absorbents used in closed and semi-closed circuit environments play a key role in preventing carbon dioxide poisoning. Here we present an analysis of one of the most common carbon dioxide absorbents—soda lime. In the first step, we analyzed the composition of fresh and used samples. For this purpose, volumetric and photometric analyses were introduced. Thermal properties and decomposition patterns were also studied using thermogravimetric and X-ray powder diffraction (PXRD) analyses. We also investigated the kinetics of carbon dioxide absorption under conditions imitating a closed-circuit environment.

Kinetics of Methane and Carbon Dioxide Hydrate Formation in Silica Gel Pores

2009 ◽  
Vol 23 (7) ◽  
pp. 3711-3715 ◽  
Author(s):  
Seong-Pil Kang ◽  
Yutaek Seo ◽  
Wonho Jang
Keyword(s):  
Carbon Dioxide ◽  
Silica Gel ◽  
Hydrate Formation ◽  
Carbon Dioxide Hydrate ◽  
Kinetics Of

Gas phase interaction with catalytic oxidation reactions

1972 ◽  
Vol 326 (1565) ◽  
pp. 215-227 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Maleic Anhydride ◽  
Catalytic Oxidation ◽  
Gas Phase ◽  
Major Part ◽  
Oxidation Reactions ◽  
Mixed Gas ◽  
Kinetics Of ◽  
Oxidation Of Benzene ◽  
Homogeneous Decomposition

Studies of the catalytic oxidation of benzene to maleic anhydride and carbon dioxide over vanadia/molybdena catalysts show that the major part of the reaction involves interacting gas and gas-solid processes. The results are consistent with a mechanism in which a benzeneoxygen adduct is formed catalytically, desorbs and then reacts to give maleic anhydride entirely in the gas phase. On the basis of this proposed mechanism, the kinetics of individual reactions have been investigated in some depth. The over-oxidation of maleic anhydride has been found to be not significant under the conditions of reaction. The kinetic relationships governing the homogeneous decomposition of the adduct and the oxidation of the adduct to maleic anhydride and to carbon dioxide have been established. The results show that essentially all of the anhydride originates from mixed gas-solid/gas reaction while substantial amounts of carbon dioxide are produced entirely catalytically.

Kinetics of Carbon Dioxide Binding by Promoted Organic Liquids

2015 ◽  
Vol 38 (8) ◽  
pp. 1485-1489 ◽  
Author(s):  
Ozge Yuksel Orhan ◽  
Erdogan Alper
Keyword(s):  
Carbon Dioxide ◽  
Organic Liquids ◽  
Kinetics Of
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