Pyrolysis and carbon dioxide gasification kinetics of hydrochar produced from cow manure

2018 ◽  
Vol 38 (1) ◽  
pp. 154-162 ◽  
Author(s):  
Pretom Saha ◽  
Kyle McGaughy ◽  
Md. Rifat Hasan ◽  
M. Toufiq Reza
Keyword(s):  
Carbon Dioxide ◽  
Cow Manure ◽  
Kinetics Of ◽  
Carbon Dioxide Gasification

scholarly journals Carbon Dioxide Gasification Kinetics of Char from Rapeseed Oil Press Cake

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2318 ◽  
Author(s):  
Lech Nowicki ◽  
Dorota Siuta ◽  
Maciej Markowski
Keyword(s):  
Carbon Dioxide ◽  
Rapeseed Oil ◽  
Reaction Rate ◽  
Press Cake ◽  
Agricultural Waste ◽  
Estimation Procedure ◽  
Experimental Conditions ◽  
Two Step Estimation ◽  
Kinetics Of ◽  
Carbon Dioxide Gasification

Rapeseed oil press cake (RPC) is an abundantly available and renewable agricultural waste material for the production of fuels or chemicals. In this study, the rates of carbon dioxide gasification of rapeseed oil press cake char were measured by thermogravimetric analysis measurements performed at various temperatures (800–900 °C) and CO2 mole fractions (0.10–1.00). The char was obtained by slow pyrolysis, where the dried RPC was decomposed at a temperature range of 1000 °C to obtain char free of impurities that can affect the measurements. The random pore model appeared to be suitable for describing the effect of conversion on the reaction rate. The temperature, CO2, and concentration dependence of the reaction rate were given by the Arrhenius equation and a power law (nth order) correlation. The kinetic parameters based on the experimental data were determined by a two-step estimation procedure. For the experimental conditions employed in this study, the parameters E and n were 222.1 kJ/mol and 0.57, respectively.

scholarly journals Pyrolysis and Carbon Dioxide Gasification Kinetics of Pine Cones and Lignite Blends

2020 ◽  
Vol 778 ◽  
pp. 012114
Author(s):  
Janica Y. Ang ◽  
Perry C. Dee ◽  
Amos B. Tan ◽  
Vergel C. Bungay
Keyword(s):  
Carbon Dioxide ◽  
Pine Cones ◽  
Kinetics Of ◽  
Carbon Dioxide Gasification

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
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