Estimation of the carbonation reaction kinetic parameters for dilute methane and carbon dioxide conditions in a calcium looping process

2017 ◽  
Vol 37 (4) ◽  
pp. 1312-1318 ◽  
Author(s):  
Savankumar Patel ◽  
Priscilla Tremain ◽  
Behdad Moghtaderi ◽  
James Sandford ◽  
Kalpit Shah
Keyword(s):  
Carbon Dioxide ◽  
Kinetic Parameters ◽  
Reaction Kinetic ◽  
Carbonation Reaction ◽  
Calcium Looping

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 Mineral carbonation process of carbon dioxide using animal bone

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110196
Author(s):  
Brendon Mpofu ◽  
Hembe E Mukaya ◽  
Diakanua B Nkazi
Keyword(s):  
Carbon Dioxide ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Economic Feasibility ◽  
Mineral Carbonation ◽  
Agitation Rate ◽  
Carbonation Reaction ◽  
Carbonation Process ◽  
The Cost ◽  
Cow Bone

Carbon dioxide has been identified as one of the greenhouse gases responsible for global warming. Several carbon capture and storage technologies have been developed to mitigate the large quantities of carbon dioxide released into the atmosphere, but these are quite expensive and not easy to implement. Thus, this research analyses the technical and economic feasibility of using calcium leached from cow bone to capture and store carbon dioxide through the mineral carbonation process. The capturing process of carbon dioxide was successful using the proposed technique of leaching calcium from cow shinbone (the tibia) in the presence of HCl by reacting the calcium solution with gaseous carbon dioxide. AAS and XRF analysis were used to determine the concentration of calcium in leached solutions and the composition of calcium in cow bone respectively. The best leaching conditions were found to be 4 mole/L HCl and leaching time of 6 h. Under these conditions, a leaching efficiency of 91% and a calcium conversion of 83% in the carbonation reaction were obtained. Other factors such as carbonation time, agitation rate, and carbonation reaction temperature had little effect on the yield. A preliminary cost analysis showed that the cost to capture 1 ton of CO2 with the proposed technique is about US$ 268.32, which is in the acceptable range of the capturing process. However, the cost of material used and electricity should be reviewed to reduce the preliminary production cost.

Understanding sulfation effect on the kinetics of carbonation reaction in calcium looping for CO2 capture

2021 ◽  
Vol 221 ◽  
pp. 106913
Author(s):  
Susu Chen ◽  
Changlei Qin ◽  
Junjun Yin ◽  
Xu Zhou ◽  
Shuzhen Chen ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Carbonation Reaction ◽  
Calcium Looping ◽  
Kinetics Of

scholarly journals Reaction kinetic parameters for a distributed model of transport and reaction in Pd/Rh/CeZrO three-way catalytic converters

DYNA ◽  
2019 ◽  
Vol 86 (210) ◽  
pp. 216-223
Author(s):  
David Camilo Rosero Chicaíza ◽  
Bibian A Hoyos
Keyword(s):  
Kinetic Parameters ◽  
Reaction Kinetic ◽  
Distributed Model ◽  
Excess Oxygen ◽  
Catalytic Converters ◽  
First Order ◽  
Combustion Gases ◽  
Concentration Changes ◽  
Diffusive Effects ◽  
Volume Method

This paper presents a two-dimensional distributed model for the transport and reaction of combustion gases in channels of three-way catalytic converters, considering a detailed reaction kinetics with 16 chemical reactions in palladium and rhodium catalysts, and taking into account diffusive effects within the coating, to obtain a new set of reaction kinetic parameters that do not depend on the thickness of the coating. The model was solved using a finite volume method with a first order upwind scheme and simulations were conducted using computational fluid dynamics. The model with the new distributed reaction kinetic parameters, produced an excellent agreement with the experimental data of concentration at the end of the channels. Also, the model reproduced the most important concentration changes for the gas components in the specified temperature range and allowed simulations with excess oxygen and different thicknesses.

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