Mineral carbonation of red gypsum via pH-swing process: Effect of CO2 pressure on the efficiency and products characteristics

Azdarpour, Amin; Asadullah, Mohammad; Mohammadian, Erfan; Junin, Radzuan; Hamidi, Hossein; Manan, Muhammad A.; Daud, Ahmad Rafizan Mohamad

doi:10.1016/j.cej.2014.11.125

Cited by 63 publications

(40 citation statements)

References 51 publications

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“…CO 2 solubility and reactivity increases with pressure. Previous studies have pointed out that a decrease in pH of the brine can be observed as the dissolution of CO 2 in brine is elevated by pressure, which creates a favorable condition for rock dissolution to occur [11,[47][48][49][50]. Therefore, in order to link the changes of permeability to the rock dissolution, the pH of effluents as well as calcium concentrations had to be determined after each coreflood experiment.…”

Section: Results and Discussion 31 Effect Of Injection Pressure On mentioning

confidence: 99%

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Karaei

Honarvar

Azdarpour

et al. 2019

Period. Polytech. Chem. Eng.

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The lack of fundamental experimental studies on low permeable carbonate reservoirs for CO2 sequestration purposes is essential for further application of CO2 sequestration as a highly-anticipated CO2 mitigation method in deep saline aquifers, specifically those with low permeabilities. The core samples were taken from a carbonate reservoir in Iran and the brine composition was based on that of the same formation. The objective of this study is to investigate permeability alteration during CO2 sequestration in the aquifers of a low permeable Iranian carbonate reservoir. Various parameters have been investigated. The effects of different parameters such as injection pressure, confining pressure, and temperature on permeability alteration of the cores was investigated. Moreover, the interfacial tension (IFT) of CO2/brine was also determined at pressures and temperatures up to 7 MPa and 100 °C, respectively. The experimental results showed CO2 solubility and rock dissolution to be the governing mechanism when CO2 was injected into carbonate cores. The permeability measurements showed that permeability increases by increasing injection pressure and decreases by increasing confining pressure and temperature. The IFT measurement results showed that the IFT decreases significantly when there is an increase in pressure and temperature.

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Section: Results and Discussion 31 Effect Of Injection Pressure On mentioning

confidence: 99%

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Karaei

Honarvar

Azdarpour

et al. 2019

Period. Polytech. Chem. Eng.

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“…High aspect ratio single crystal rods of vaterite were obtained within membranes [78]. Synthetically, vaterite is often observed as a transient phase that converts into calcite via dissolution-precipitation [79], and some evidence has been presented on the structural variability and the origin of synthetic vaterite with multiple structures [80][81][82]. In the absence of organic additives or membranes synthesis of pure vaterite is particularly rare.…”

Section: Vaterite-precipitated Calcium Carbonate Filled Polypropylenementioning

confidence: 99%

A strategy of precipitated calcium carbonate (CaCO3) fillers for enhancing the mechanical properties of polypropylene polymers

Thriveni

Jun

Han

et al. 2015

Korean J. Chem. Eng.

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A wide variety of fillers are currently used in more than twenty types of polymer resins, although four of them alone (polypropylene, polyamides, thermoplastic polyesters, and polyvinyl chloride) account for 90% of the market of mineral fillers in plastics. Polypropylene (PP) and PVC dominate the market for calcium carbonate. PP is a versatile reinforcement material that can meet engineering and structural specifications and is widely used for automotive components, home appliances, and industrial applications. Talc, mica, clay, kaolin, wollastonite, calcium carbonates, feldspar, aluminum hydroxide, glass fibers, and natural fibers are commonly used in fillers. Among these, calcium carbonate (both natural and synthetic) is the most abundant and affords the possibility of improved surface finishing, control over the manufacture of products, and increased electric resistance and impact resistance. Meeting the global challenge to reduce the weight of vehicles by using plastics is a significant issue. The current the global plastic and automobile industry cannot survive without fillers, additives, and reinforcements. Polypropylene is a major component of the modern plastic industry, and currently is used in dashboards, wheel covers, and some engine parts in automobiles. This article reports that the use of calcium carbonate fillers with polypropylene is the best choice to enhance the mechanical properties of plastic parts used in automobiles.

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“…These trends can be explained by the difference in the amount of protons generated from bicarbonate and carbonate reactions, following the dissolution of CO 2 gas in aqueous solution. Azdarpour et al [32] also reported that an increase in CO 2 gas pressure (i.e., an increase in CO 2 gas injection) enhanced the carbonation efficiency. In this current study, the protons that led to the decrease in solution pH were generated by the formation of CO 3 2− , not HCO 3 − , above a solution pH of 8.5 [33].…”

Section: Physicochemical Characteristics Of the Samplementioning

confidence: 99%

An Eco-Friendly Neutralization Process by Carbon Mineralization for Ca-Rich Alkaline Wastewater Generated from Concrete Sludge

Yoo

Shin

2017

Metals

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Waste-concrete recycling processes using wet-based crushing methods inevitably generate a large amount of alkaline concrete sludge, as well as wastewater, which contains abundant Ca ions. The Ca-rich alkaline wastewater must then be neutralized for reuse in the waste-concrete recycling process. In this study, the feasibility of a carbon mineralization process for the neutralization of alkaline wastewater was considered from both environmental and economic perspectives. The optimal reaction time, efficiency of Ca removal and CO 2 sequestration as a function of the CO 2 gas flow rate were assessed. The carbon mineralization process resulted in sequestering CO 2 (85-100% efficiency) and removing Ca from the solution (84-99%) by precipitating pure CaCO 3 . Increasing the gas flow rate reduced the reaction time (65.0 down to 3.4 min for 2.5 L of solution), but decreased CO 2 sequestration (from 463.3 down to 7.3 mg CO 2 for 2.5 L of solution). Optimization of the gas flow rate is essential for efficient CO 2 sequestration, Ca removal, CaCO 3 production and, therefore, successful wastewater neutralization following the wet-based crushing process. The method presented here is an eco-friendly and economically viable substitute for dealing with alkaline wastewater. It may also provide a practical guide for the design of carbon mineralization processes for the neutralization of alkaline solutions containing large amounts of Ca.

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Mineral carbonation of red gypsum via pH-swing process: Effect of CO2 pressure on the efficiency and products characteristics

Cited by 63 publications

References 51 publications

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

A strategy of precipitated calcium carbonate (CaCO3) fillers for enhancing the mechanical properties of polypropylene polymers

An Eco-Friendly Neutralization Process by Carbon Mineralization for Ca-Rich Alkaline Wastewater Generated from Concrete Sludge

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