CaO-based sorbent derived from lime mud and bauxite tailings for cyclic CO2 capture

Zhang, Yaqin; He, Lei; Aihua, Ma; Jia, Qingming; He, Shanchuan

doi:10.1007/s11356-018-2825-1

Cited by 23 publications

(10 citation statements)

References 44 publications

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“…BTs have a good viscosity and plasticity due to their high concentration of highly viscous kaolin [16], which can replace aggregates, such as fine sand, gravel, and other materials, used to prepare cement slurries to shorten the slurry setting time. As a result, some research and experiments performed in recent years have focused on utilizing BTs in cement [17,18], building materials and ceramics [12,14], alloy materials [19], and absorbent materials [20,21], such as 4A zeolite [22] and CaO-based sorbents [15,23]. e application of BTs will bring great economic and environmental benefits to engineering construction.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Properties of Foamed Mixture Lightweight Soil Mixed with Bauxite Tailings as Filler

Peng

Jiang

et al. 2019

Advances in Materials Science and Engineering

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To make better use of large amounts of discarded bauxite tailings (BTs), a foamed mixture lightweight soil mixed with BTs as filler (FMLSB) was proposed. Using the orthogonal experimental design method, the effects of various contents of cement, BTs, and foam on the fluidity, wet density, unconfined compressive strength, water absorption, and microstructure of FMLSB were studied. The experimental results indicate that the wet density and unconfined compressive strength increase as the contents of cement and BTs increase but decrease as the foam content increases. Water absorption increases with the reduction of the wet density, but the unconfined compressive strength exponentially increases as the wet density increases. With an increase in the contents of cement and BTs and a decrease in the foam content, fewer pores are present, and the pores are not connected with each other. The results of the range analysis show that the main factor affecting the wet density and unconfined compressive strength of the FMLSB is the foam content, followed by the cement content, and meanwhile, BTs can maintain the lightweight and high strength of FMLSB. Based on the intended engineering applications and standard specifications, the optimum composition of the FMLSB mixture is proposed. Overall, the results indicate that BTs have the potential to be used as filler to produce FMLSB and that applications of FMLSB will lead to great economic and environmental benefits in engineering construction.

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Section: Introductionmentioning

confidence: 99%

Investigating the Properties of Foamed Mixture Lightweight Soil Mixed with Bauxite Tailings as Filler

Peng

Jiang

et al. 2019

Advances in Materials Science and Engineering

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“…The use of naturally occurring CaO-based materials as the CO 2 sorbent is a cost-effective and straightforward approach for the CaL process as a result of its wide availability and comparatively low cost. Various research work has been conducted on naturally occurring CaO-based sorbents, mainly including limestone, , dolomite, , and other natural materials, such as eggshells, , seashells, , lime mud, − and manganocalcite mineral, to evaluate their CO 2 capture performance for the potential large-scale industrial applications. However, the rapid decline in CO 2 capture performance has been widely reported for these natural materials .…”

Section: Improvements Of Naturally Occurring Cao-based Sorbentsmentioning

confidence: 99%

Review on the Development of Sorbents for Calcium Looping

2020

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The calcium looping (CaL) process is a promising CO 2 capture technology, which uses CaO-based sorbents by employing a reversible reaction between CaO and CO 2 , generally named carbonation and calcination for each direction of the reaction. Although CaO-based sorbents possess many advantages, including wide availability, relatively low cost, and high theoretical CO 2 uptake (∼0.786 g of CO 2 /g of CaO), it mainly suffers from a rapid decline in CO 2 capture performance during cyclic operation, which has remained an urgent issue required to be addressed for industrial applications of the CaL process. Extensive studies have been conducted thus far, attempting to prevent and/or alleviate the rapid performance decay of the sorbents. Thus, this paper reviews the recent development of the CaL process worldwide with an emphasis on its development in China, mainly focusing on the advancement in the design and reinforcement of CaO-based sorbents. These activation strategies mainly include doping, chemical pretreatment, incorporation of supports with high Tammann temperatures, and structural modification, which do enhance the cyclic performance of the sorbents. However, some challenges still exist in the development of the CaO-based sorbents, such as the cost of the synthesis route, the scale-up pathways of the sorbents, the assessment of cyclic performance under mild conditions, and the ignorance of mechanical strength and attrition resistance of the sorbents. Therefore, life cycle assessment together with techno-economic analysis is essential when synthesizing CaO-based sorbents. In addition, more work should be conducted under industrially relevant conditions in fluidized bed reactors and even pilot-scale reactors, which are much closer to industrial situations. In this case, mechanical strength and attrition resistance are also assessed during cyclic operation.

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“…11 A great deal of harmful chemicals (such as caustic soda) carried by LM can pollute the groundwater and soil, which increases the pH value of the surrounding soil, and seriously endangers the ecological environment. 12,13 In view of the problem of LM, America Mineral Technologies Inc.…”

Section: Introductionmentioning

confidence: 99%

Eco‐environmental benefits analysis of EcoPartnerships program of production technology of calcium carbonate from lime mud produced by alkaline papermaking

Geng

Ma²,

Liu

2021

Env Prog and Sustain Energy

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Lime mud (LM) is a kind of industrial solid waste produced in alkali recovery in papermaking industry. LM is a global environmental challenge that both China and the United States are facing. With the support of the EcoPartnership Program under the 10-year Sino-US Energy and Environment Cooperation Framework, China Sun Paper Joint Stock Co., Ltd. has successfully formed a partnership with America Mineral Technologies Inc. (MTI). MTI has applied the production technology of calcium carbonate from LM produced by alkaline papermaking (PTCC) to the Sun Paper Company. Compared with the traditional treatment technology of LM in Sun Paper Company, the reduction efficiency of the PTCC technology can reach 97.99%. The waste residue is relatively more stable and poses less threat to the environment than traditional technology. The energy consumption is low, and 4.15 kgce can be saved by treating per ton of LM. It does not release carbon dioxide to the environment, but consumes 0.485 tons of carbon dioxide per ton of LM on the contrary. Because the calcium carbonate produced can be used as a product, RMB 531 yuan can be saved in the treatment of each ton of LM. The PTCC process is conducive to the coordinated development of economic, environmental, and social benefits, and realizes the sustainable development of the paper industry.

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CaO-based sorbent derived from lime mud and bauxite tailings for cyclic CO2 capture

Cited by 23 publications

References 44 publications

Investigating the Properties of Foamed Mixture Lightweight Soil Mixed with Bauxite Tailings as Filler

Investigating the Properties of Foamed Mixture Lightweight Soil Mixed with Bauxite Tailings as Filler

Review on the Development of Sorbents for Calcium Looping

Eco‐environmental benefits analysis of EcoPartnerships program of production technology of calcium carbonate from lime mud produced by alkaline papermaking

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