Energy-efficient mineral carbonation of CaSO4 derived from wollastonite via a roasting-leaching route

Xu, Xingliang; Liu, Weizao; Chu, Guanrun; Zhang, Guoquan; Luo, Dongmei; Yue, Hairong; Liang, Bin; Li, Chun

doi:10.1016/j.hydromet.2019.01.004

Cited by 29 publications

(7 citation statements)

References 35 publications

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“…Assuming that the required thermal energy is provided by standard coal with a calorific value of 29 300 kJ/kg and thermal efficiency of 80%, the amount of standard coal needed for the whole process is 118 kg. This amount of standard coal will emit approximately 296 kg of CO 2 based on its carbon emission factor of 2.5 kg/kg CO 2 . In this process, around 63 kWh of electric energy is required due to the operation of equipment.…”

Section: Resultsmentioning

confidence: 99%

“…This amount of standard coal will emit approximately 296 kg of CO 2 based on its carbon emission factor of 2.5 kg/kg CO 2 . 36 In this process, around 63 kWh of electric energy is required due to the operation of equipment. This amount of electric energy will emit approximately 50 kg of CO 2 based on its carbon emission factor of 0.8 kg/kWh CO 2 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation

Rohani

Jiang

et al. 2021

ACS Sustainable Chem. Eng.

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CO2 mineral sequestration is one of the most promising strategies for combating global warming. However, its industrial applications of CO2 mineral carbonation are limited due to the concerns of energy and cost consumption. Simultaneously, recovery of valuable byproducts is essential for favorable economic viability during the mineralization process. In this study, a novel process combining CO2 mineral sequestration and zeolite synthesis by using blast furnace slag was proposed. Si/Al-gel was first prepared by leaching and precipitation of the slag, followed by hydrothermal reaction to synthesize faujasite type zeolite. The process optimization and CO2 net-emission reduction evaluation of the proposed route were conducted in this study. A sole phase faujasite zeolite with high specific surface area (721 m2/g) was successfully synthesized under the optimal hydrothermal conditions. The Si/Al-depleted precipitated mother liquid (rich in MgSO4) together with the CaSO4·0.5H2O leaching residue was used to mineral sequestrate CO2. The total amount of CO2 sequestrated by processing one ton slag was 398 kg. Preliminary evaluation of CO2 net-emission reduction indicated that 52 kg of CO2 can be permanently stored for 1000 kg of slag processing after deducting the CO2 released in this process. The major component of blast furnace slag was fully utilized in this process, realizing the double benefits of CO2 emission reduction and solid waste disposal as well as exhibiting great potential for industrial application.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation

Rohani

Jiang

et al. 2021

ACS Sustainable Chem. Eng.

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“…Ex situ mineralization involves reacting high surface area alkaline minerals with CO 2 -rich gases, mainly in engineered reactors (Gerdemann et al, 2007). Ex situ approaches using crushed natural rocks rich in minerals such as olivine (Kwon et al, 2011), serpentine (Park and Fan, 2004;Wang and Maroto-Valer, 2011b;Nduagu et al, 2012), and wollastonite (Huijgen et al, 2006;Daval et al, 2009;Xu et al, 2019) have been investigated, but industrial alkaline wastes and byproducts, such as mine tailings (Bodénan et al, 2014) or iron and steel slags (Yadav and Mehra, 2017), are likely better suited to ex situ processes owing to greater reactivity than their natural counterparts, as discussed in the section Artificial Alkaline Minerals-Industrial by-Products and Wastes, and Tailored Minerals. High temperatures and pressures (Domingo et al, 2006), high CO 2 partial pressures (Li et al, 2019), additives (Krevor and Lackner, 2009), and mechanical (Fabian et al, 2010;Li and Hitch, 2018), or heat activation (Farhang et al, 2019) could be used to capture and store CO 2 within timeframes relevant to industrial processes.…”

Section: Ex Situmentioning

confidence: 99%

Geochemical Negative Emissions Technologies: Part I. Review

et al. 2022

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Over the previous two decades, a diverse array of geochemical negative emissions technologies (NETs) have been proposed, which use alkaline minerals for removing and permanently storing atmospheric carbon dioxide (CO2). Geochemical NETs include CO2 mineralization (methods which react alkaline minerals with CO2, producing solid carbonate minerals), enhanced weathering (dispersing alkaline minerals in the environment for CO2 drawdown) and ocean alkalinity enhancement (manipulation of ocean chemistry to remove CO2 from air as dissolved inorganic carbon). CO2 mineralization approaches include in situ (CO2 reacts with alkaline minerals in the Earth's subsurface), surficial (high surface area alkaline minerals found at the Earth's surface are reacted with air or CO2-bearing fluids), and ex situ (high surface area alkaline minerals are transported to sites of concentrated CO2 production). Geochemical NETS may also include an approach to direct air capture (DAC) that harnesses surficial mineralization reactions to remove CO2 from air, and produce concentrated CO2. Overall, these technologies are at an early stage of development with just a few subjected to field trials. In Part I of this work we have reviewed the current state of geochemical NETs, highlighting key features (mineral resources; processes; kinetics; storage durability; synergies with other NETs such as DAC, risks; limitations; co-benefits, environmental impacts and life-cycle assessment). The role of organisms and biological mechanisms in enhancing geochemical NETs is also explored. In Part II, a roadmap is presented to help catalyze the research, development, and deployment of geochemical NETs at the gigaton scale over the coming decades.

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“…Recent investment and interest by major mining companies [22][23][24], governments (i.e., UK council for CCUS [25]), and research institutions for deploying CCUS at industrial scale, indicate the significance of these technologies. In particular, investigating the potential role of mining waste in mineral carbon sequestration, for example, investigation of mineral carbonation in diamond tailings at Venetia Mine in South Africa and the Gahcho Kué Mine in Canada [24] and process optimisation toward more economically viable technologies with reduced energy requirements [26], more efficient process routes [27,28], and recycled industrial waste feedstock for mineral carbonation [29,30] will contribute to the low carbon future. Rehabilitation of mined land often includes various factors related to the risks associated with residue during and after mining operations, for example, management of acid mine drainage (AMD).…”

Section: Introductionmentioning

confidence: 99%

Opportunities for Mineral Carbonation in Australia’s Mining Industry

et al. 2019

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Carbon capture, utilisation and storage (CCUS) via mineral carbonation is an effective method for long-term storage of carbon dioxide and combating climate change. Implemented at a large-scale, it provides a viable solution to harvesting and storing the modern crisis of GHGs emissions. To date, technological and economic barriers have inhibited broad-scale utilisation of mineral carbonation at industrial scales. This paper outlines the mineral carbonation process; discusses drivers and barriers of mineral carbonation deployment in Australian mining; and, finally, proposes a unique approach to commercially viable CCUS within the Australian mining industry by integrating mine waste management with mine site rehabilitation, and leveraging relationships with local coal-fired power station. This paper discusses using alkaline mine and coal-fired power station waste (fly ash, red mud, and ultramafic mine tailings, i.e., nickel, diamond, PGE (platinum group elements), and legacy asbestos mine tailings) as the feedstock for CCUS to produce environmentally benign materials, which can be used in mine reclamation. Geographical proximity of mining operations, mining waste storage facilities and coal-fired power stations in Australia are identified; and possible synergies between them are discussed. This paper demonstrates that large-scale alkaline waste production and mine site reclamation can become integrated to mechanise CCUS. Furthermore, financial liabilities associated with such waste management and site reclamation could overcome many of the current economic setbacks of retrofitting CCUS in the mining industry. An improved approach to commercially viable climate change mitigation strategies available to the mining industry is reviewed in this paper.

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Energy-efficient mineral carbonation of CaSO4 derived from wollastonite via a roasting-leaching route

Cited by 29 publications

References 35 publications

CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation

CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation

Geochemical Negative Emissions Technologies: Part I. Review

Opportunities for Mineral Carbonation in Australia’s Mining Industry

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Energy-efficient mineral carbonation of CaSO4 derived from wollastonite via a roasting-leaching route

Cited by 29 publications

References 35 publications

CO2 Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO2 Net-Emission Reduction Evaluation

CO2 Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO2 Net-Emission Reduction Evaluation

Geochemical Negative Emissions Technologies: Part I. Review

Opportunities for Mineral Carbonation in Australia’s Mining Industry

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Product

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CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation

CO₂ Mineral Sequestration and Faujasite Zeolite Synthesis by Using Blast Furnace Slag: Process Optimization and CO₂ Net-Emission Reduction Evaluation