Facile and cost-efficient indirect carbonation of blast furnace slag with multiple high value-added products through a completely wet process

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

doi:10.1016/j.energy.2018.10.128

Cited by 38 publications

(7 citation statements)

References 33 publications

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“…The chemical composition of the BFS is shown in Table S2 in the Supporting Information. The BFS was leached with a mixed solution of (NH 4 ) 2 SO 4 and H 2 SO 4 as described in our previous study . The obtained leachate and residue were a multisulfate solution and semihydrated gypsum, respectively, and their compositions are depicted in Tables and .…”

Section: Methodsmentioning

confidence: 99%

“…The optimization of the leaching process has been reported in our previous study. 26 The optimal extraction ratios of Ca, Mg, Al, and Si were 97.3%, 98.8%, 96.4%, and 94.3%, respectively. In the present study, the synthesis of zeolite and the mineral carbonation processes were investigated systematically by using the above obtained leachate and residue as raw material.…”

Section: ■ Introductionmentioning

confidence: 92%

“…The BFS was leached with a mixed solution of (NH 4 ) 2 SO 4 and H 2 SO 4 as described in our previous study. 26 The obtained leachate and residue were a multisulfate solution and semihydrated gypsum, respectively, and their compositions are depicted in Tables 1 and 2. All chemical reagents used, such as NaOH, NH 4 OH, H 2 SO 4 , and (NH 4 ) 2 SO 4 , were of analytical grade.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…In the proposed process, BFS was first leached with a mixed solution of (NH 4 ) 2 SO 4 and H 2 SO 4 to form a leachate of MgSO 4 , Al 2 (SO 4 ) 3 , H 4 SiO 4 , and a residue of CaSO 4 ·0.5H 2 O. The optimization of the leaching process has been reported in our previous study . The optimal extraction ratios of Ca, Mg, Al, and Si were 97.3%, 98.8%, 96.4%, and 94.3%, respectively.…”

Section: Introductionmentioning

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: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 92%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

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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“…However, the high power consumption for the regeneration of NaOH made the process unsuitable for CO 2 storage. Chu et al 18 proposed a completely wet process, whereby sulfuric acid (H 2 SO 4 ) and (NH 4 ) 2 SO 4 were mixed to generate ammonium bisulfate (NH 4 HSO 4 ), and then BF slag was leached in NH 4 HSO 4 solution at 80 C in 20 min. The mass ratio of BF slag to NH 4 HSO 4 was 1 : 3.25, and the leaching ratios of Ca, Mg, and Al reached 97.3%, 98.8%, and 96.4%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Microwave roasting of blast furnace slag for carbon dioxide mineralization and energy analysis

et al. 2020

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Recycling of iron and steel slag for carbon reduction and low‐environment load application

Xu,

Li,

et al. 2024

Carbon Neutralization

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The high‐value utilization of blast furnace slag (BFS) and steel slag (SS) as a valuable resource in the field of carbon reduction represents a green revolution, and also is an indispensable path toward breaking through resource and environmental constraints and achieving high‐quality, sustainable development through solid waste utilization in the steel industry. Achieving resource recycling while harnessing the untapped latent energy of resources and exploring their carbon sequestration capabilities has become a crucial avenue for further valorization through waste utilization. BFS and SS discharged from iron‐making or steel‐making furnaces carry a significant amount of latent heat, especially the calcium oxide component in SS, which gives it a unique advantage in the field of comprehensive BFS and SS utilization and carbonation‐based SS utilization. This article discusses the current research status of low‐carbon‐waste‐heat utilization in the production of microcrystalline glass, cementitious materials, functional adsorbents, and other products through front‐end modification of molten BFS and SS. This report also provides an overview of carbon capture by utilizing BFS and SS, offering insights into the research directions for subsequent heat recovery, online quality adjustment, high‐value utilization, and carbon sequestration using BFS and SS in the steel industry.

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Facile and cost-efficient indirect carbonation of blast furnace slag with multiple high value-added products through a completely wet process

Cited by 38 publications

References 33 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

Microwave roasting of blast furnace slag for carbon dioxide mineralization and energy analysis

Recycling of iron and steel slag for carbon reduction and low‐environment load application

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Facile and cost-efficient indirect carbonation of blast furnace slag with multiple high value-added products through a completely wet process

Cited by 38 publications

References 33 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

Microwave roasting of blast furnace slag for carbon dioxide mineralization and energy analysis

Recycling of iron and steel slag for carbon reduction and low‐environment load application

Contact Info

Product

Resources

About

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