Enhanced CO2 capture through reaction with steel-making dust in high salinity water

Ibrahim, Mohamed H.; El‐Naas, Muftah H.; Zevenhoven, Ron; Al‐Sobhi, Saad A.

doi:10.1016/j.ijggc.2019.102819

Cited by 53 publications

(24 citation statements)

References 31 publications

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“…The computational grid and mesh structure of the contact system were generated using the GAMBIT 2.4.6 software described elsewhere [ 4 ]. A structure with 2-D geometry was established in semi-batch mode and then imported into ANSYS Fluent 18.0 to simulate the flow of gas into the contact system [ 4 ]. The contact system was initially filled with a specific amount of water.…”

Section: Cfd Simulationmentioning

confidence: 99%

“…The internal diameter and height of the contact system were 0.078 m and 0.850 m, respectively, and the total working volume of water was 3000 ml. The water level increased after the gas started to flow; therefore, the air space was kept at the top of the reactor [ 4 ].…”

Section: Cfd Simulationmentioning

confidence: 99%

“…The mesh independency was studied in previous work [ 4 ] by investigating the air velocity distribution at a specific height over the gas inlet. Seven mesh sizes from 0.0022 m to 0.0016 m were examined.…”

Section: Cfd Simulationmentioning

confidence: 99%

“…Mixing particles were shown to provide greater interfacial area between the gas and liquid and thereby enhance gas reactivity. In addition, the gas was reported to be perfectly distributed into the reactor and hence improved the mass and heat transfer between phases [ 4 ]. The inert particles used in the contact system previously [ 1 ] were made of polymethyl methacrylate with an average particle diameter of 0.013 m, density of 1020 kg/m 3 , surface area of 4.92 cm 2 /particle, and sphericity of 1.0; these particles were also used in the present study.…”

Section: Cfd Simulationmentioning

confidence: 99%

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CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

Mohammad

Mourad

Al‐Marzouqi

et al. 2021

Heliyon

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Inert-particles spouted bed reactor (IPSBR) is characterized by intense mixing generated by the circular motion of the inert particles. The operating parameters play an important role in the performance of the IPSBR system, and therefore, parameter optimization is critical for the design and scale-up of this gas–liquid contact system. Computational fluid dynamics (CFD) provides detailed modeling of the system hydrodynamics, enabling the determination of the operating conditions that optimize the performance of this contact system. The present work optimizes the main IPSBR operating parameters, which include a feed-gas velocity in the range 0.5–1.5 m/s, orifice diameter in the range 0.001–0.005 m, gas head in the range 0.15–0.35 m, mixing-particle diameter in the range 0.009–0.0225 m, and mixing-particle to reactor volume fraction in the range 2.0–10.0 vol % (which represents 0.01–0.1 kg of mixing particles loading). The effects of these parameters on the average air velocity and average air volume fraction in the upper, middle, and conical regions of the reactor were studied. The specific distance for each region has been measured from the orifice point to be 50 mm for the conical region, 350 mm for the middle region and 550 mm for the upper rejoin. The selected factors were optimized to obtain the minimum air velocity distribution (maximum gas residence time) and the maximum air volume fraction (maximum interfacial area concentration) because these conditions will increase the gas holdup, the gas–liquid contact area, and the mass transfer coefficient among phases. Response surface methodology (RSM) was used to determine the optimum operating conditions. The regression analysis showed an excellent fit of the experimental data to a second-order polynomial model. The interaction between the process variables was evaluated using the obtained three-dimensional surface plots. The analysis revealed that under the optimized parameters of a feed-gas velocity of 1.5 m/s, orifice diameter of 0.001 m, gas head of 0.164 m, mixing-particle diameter of 0.0225 m, and mixing-particle loading of 0.02 kg, the minimum average air velocity and highest air volume fraction were observed throughout the reactor.

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Section: Cfd Simulationmentioning

confidence: 99%

Section: Cfd Simulationmentioning

confidence: 99%

Section: Cfd Simulationmentioning

confidence: 99%

Section: Cfd Simulationmentioning

confidence: 99%

See 2 more Smart Citations

CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

Mohammad

Mourad

Al‐Marzouqi

et al. 2021

Heliyon

View full text Add to dashboard Cite

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“…However, it was stated that further investigation is still needed to enhance the capturing of CO 2 . In a recent study, Ibrahim et al 23 examined the use of steel-making Bag House Dust (BHD) as a potential source of CaO in the modified Solvay process. An optimum CO 2 uptake of 0.22 g CO 2 /g BHD was obtained under a temperature of 24 C and pressure of 1 atm.…”

Section: Introductionmentioning

confidence: 99%

Effects of potassium hydroxide and aluminum oxide on the performance of a modified solvay process for CO ₂ capture: A comparative study

et al. 2021

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In a previous work, the overall performance of modified Solvay process was investigated in the absence of ammonia, where carbon dioxide and brine treatments were accomplished in a single reaction and in the presence of calcium hydroxide (Ca(OH) 2 ). In this study, the impact of alkaline and amphoteric oxides, namely potassium hydroxide (KOH) and aluminum oxide (Al 2 O 3 ), on the pH level, CO 2 capture capacity, ions reduction, and type of produced solids was investigated at a temperature of 20 C and a gas flow rate of 1 L/min. At the stoichiometric ratio and less than the solubility limit, the KOH/brine mixture achieved a CO 2 uptake of 0.31 g CO 2 /g KOH. In comparison, about 0.92 g of CO 2 was captured by 1 g of CaO when CaO was added to the brine in an amount that was more than the solubility limit but less than the stoichiometric ratio. Moreover, the percentage of the ions reduction for the KOH and CaO was almost the same except for the sulfate ions, as the best removal was for the CaO. The poorest CO 2 capture and ions removal occurred with the Al 2 O 3 . X-ray diffraction was used to identify most of the solid products, and the obtained results proved that KOH is a promising alkaline for the combined process. In addition, potassium chloride crystals were produced when KOH was utilized, which is a very valuable product, and it can also be easily separated. Although Al 2 O 3 showed no reactivity, it revealed good results in terms of magnesium ions recovery and could be considered as a coagulant for recovering magnesium ions in the reject brine solution.

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Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

et al. 2021

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Carbon dioxide conversion into useful products has been gaining considerable attention as a global‐warming‐mitigation technique. The electrochemical conversion of CO2 into high‐value chemicals involves the utilization of electrical energy in the presence of an effective catalyst. The process products depend on the number of transferred electrons during the reaction and the characteristics of the electrode. Recently, electrodes coupled with active catalysts have been used to convert CO2 into valuable products including formic acid, hydrocarbons, and syngas. This review offers an overview of the recent literature on the electrochemical conversion of CO2 to valuable products, with an emphasis on the production of formate/formic acid. In addition, it compares the main features of electrochemical conversion to other techniques and summarizes their key advantages. It also provides future perspective for research and development, such as the need for novel and selective catalysts to obtain high conversion and product yield with low energy consumption.

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Enhanced CO2 capture through reaction with steel-making dust in high salinity water

Cited by 53 publications

References 31 publications

CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

Effects of potassium hydroxide and aluminum oxide on the performance of a modified solvay process for CO ₂ capture: A comparative study

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

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Enhanced CO2 capture through reaction with steel-making dust in high salinity water

Cited by 53 publications

References 31 publications

CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

Effects of potassium hydroxide and aluminum oxide on the performance of a modified solvay process for CO 2 capture: A comparative study

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

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Product

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Effects of potassium hydroxide and aluminum oxide on the performance of a modified solvay process for CO ₂ capture: A comparative study