Progress in enhancement of CO2 absorption by nanofluids: A mini review of mechanisms and current status

Zhang, Zhien; Cai, Jianchao; Feng, Chen; Li, Hao; Zhang, Wenxiang; Qi, Wenjie

doi:10.1016/j.renene.2017.11.031

Cited by 252 publications

(85 citation statements)

References 97 publications

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“…This was because considering the membrane contactors in series, the gas and liquid contact area increased and the gas and liquid reaction time in the contactor was longer (Zhang et al, 2017(Zhang et al, , 2018. Thus, the SO2 absorption efficiency improved.…”

Section: Effect Of the Number Of The Membrane Contactorsmentioning

confidence: 99%

Effect of flow and module configuration on SO2 absorption by using membrane contactors

2018

Issue 4

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Sulfur dioxide (SO2) emissions lead to negative environmental impacts and it is considered as an indicator for the larger group of gaseous sulfur oxides (SOx) in the air.In this paper, the dimethylamine (DMA) solution was used as the absorbent in a α-Al2O3 hollow fiber membrane contactor that is operated under several conditions of gas velocity, liquid velocity, and 290 K operating temperature.The effects of gas and liquid phase properties and module configuration on SO2 absorption efficiency in the hollow fiber membrane contactor were investigated. Simulation results showed that the changes of gas phase velocity, liquid phase velocity, and concentration have great influences on the absorption efficiency of SO2. An increase of the gas flow rate decreases the SO2 absorption efficiency, while an increase of the liquid flow rate has the opposite effect, increasing the efficiency. Because gas in the membrane module stays for a longer time, more absorption time promotes the gas and liquid reaction.However, the changes of the volume fraction of SO2 in the mixed gas are not significant to SO2 absorption. The simulation model could provide guidelines for selecting suitable fluid properties during the SO2 absorption process in a hollow fiber membrane contactor.

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Section: Effect Of the Number Of The Membrane Contactorsmentioning

confidence: 99%

Effect of flow and module configuration on SO2 absorption by using membrane contactors

2018

Issue 4

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“…Secondly, with CO 2 injected into the reservoir, this will cause a series of physical and chemical reactions. However, a change in load and chemical reactions with minerals will generally cause changes in the permeability and porosity of reservoirs [33][34][35]. Limited by the existing testing technology, the impacts of thickness, permeability, and porosity have not been taken into consideration.…”

Section: Thickness Permeability and Porosity Of Reservoirsmentioning

confidence: 99%

Investigation on the Relationship between Wellhead Injection Pressure and Injection Rate for Practical Injection Control in CO₂ Geological Storage Projects

Bai

2018

Geofluids

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The existing investigations on the maximum allowable wellhead injection pressure have found the upper limit of wellhead injection pressure, which, however, cannot provide a practical operational designing scheme of wellhead injection parameters for CO 2 geological storage projects. Therefore, this work firstly proposes the complete constraint conditions of wellbore injection to realize the whole process of forward and inverse calculations of wellbore pressure and then applies it to explore the relationship between wellhead injection pressure and injection rate. The results show that the wellhead injection pressure and the injection rate are a pair of mutually constrained physical quantities. For a certain injection project, the allowable wellhead injection pressure and injection rate separately form a continuous interval. Change of one quantity within its allowable interval will also change the other within its interval, both jointly forming a closed region. Thus, controlling the wellhead injection parameters in this closed region can simultaneously ensure the effectiveness and safety of injection. Subsequently, this work further studies the factors of impacting the relationship between wellhead injection pressure and injection rate and finds that all the temperature of injected fluid, the parameters of saturation, and the characteristic parameters of reservoirs only change their upper and lower limits to some extent but have no essential effects on their relationship. Application of this theory and method in Shenhua CCS demonstration project obtained the relationship diagram of wellhead injection pressure and injection rate, which found that its actual injection parameters just fall into the closed region of the relationship diagram, effectively verifying the reliability of this work.

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“…In order to reduce the greenhouse gas emissions, CO 2 capture from gas mixtures has attracted more and more attention around the world . Among a range of alternative CO 2 capture technologies, the calcium looping process (CLP) is a promising method to remove CO 2 , using a calcium‐based sorbent to capture CO 2 by calcination‐carbonation cycles , . Carbide slag (CS) is a kind of calcium‐based waste with superior CO 2 capture capacity , but is commonly recycled in the form of fine powder .…”

Section: Introductionmentioning

confidence: 98%

CO₂ Capture Performance of Portland Cement‐Based Carbide Slag and the Enhancement of Its CO₂ Capture Capacity

et al. 2018

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Carbide slag (CS) is a CaO‐based waste with superior CO2 capture capacity. As it is usually recycled in the form of fine powder, the pelletization of CS is indispensable for its practical application. Here, commercial Portland cement (PC) was used as a cheap binder to produce PC‐based carbide slag (PCCS) pellets and to enhance the mechanical strength of CS. The carbonation conversion of CS declined with the addition of PC, but the ability to resist sintering was improved. Prolonging the hydration time (HT) was effective in improving the CO2 capture performance of PCCS. During the thermal pretreatment of CS, the grain size of the CS increased with increasing thermal pretreatment temperature and time, but the mechanical strength of the CS increased.

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Progress in enhancement of CO2 absorption by nanofluids: A mini review of mechanisms and current status

Cited by 252 publications

References 97 publications

Effect of flow and module configuration on SO2 absorption by using membrane contactors

Effect of flow and module configuration on SO2 absorption by using membrane contactors

Investigation on the Relationship between Wellhead Injection Pressure and Injection Rate for Practical Injection Control in CO₂ Geological Storage Projects

CO₂ Capture Performance of Portland Cement‐Based Carbide Slag and the Enhancement of Its CO₂ Capture Capacity

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Progress in enhancement of CO2 absorption by nanofluids: A mini review of mechanisms and current status

Cited by 252 publications

References 97 publications

Effect of flow and module configuration on SO2 absorption by using membrane contactors

Effect of flow and module configuration on SO2 absorption by using membrane contactors

Investigation on the Relationship between Wellhead Injection Pressure and Injection Rate for Practical Injection Control in CO2 Geological Storage Projects

CO2 Capture Performance of Portland Cement‐Based Carbide Slag and the Enhancement of Its CO2 Capture Capacity

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Product

Resources

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Investigation on the Relationship between Wellhead Injection Pressure and Injection Rate for Practical Injection Control in CO₂ Geological Storage Projects

CO₂ Capture Performance of Portland Cement‐Based Carbide Slag and the Enhancement of Its CO₂ Capture Capacity