Water distribution and adsorption behaviors of two typical coal gasification fine slags from Ningxia Region

Zhao, Xu; Guo, Fanhui; Zhang, Yixin; Wu, Jianjun

doi:10.1016/j.colsurfa.2021.126935

Cited by 13 publications

(2 citation statements)

References 33 publications

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“…Liu et al [18] leached CGS with HCl and removed carbon in a Muffle furnace to obtain a kind of mesoporous material. Zhao et al [19] found that FS had good adsorption performance on water distribution and adsorption behaviors. due to the pore structure.…”

Section: Introductionmentioning

confidence: 99%

Using One-Step Acid Leaching for the Recovering of Coal Gasification Fine Slag as Functional Adsorbents: Preparation and Performance

Shen

et al. 2022

IJERPH

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Coal gasification fine slag (FS), a kind of by-product of coal chemical industry, was recovered for the preparation of functional adsorbents by acid leaching process, which was orthogonally optimized by HCl, HNO3, HF, HAc, and H2SO4. Methylene blue (MB) was used to evaluate the performance of functional adsorbents. The results demonstrated that 57.6% of the leaching efficiency (RLE) and 162.94 mg/g of adsorption capacity (CAC) of MB were achieved under the optimal conditions of HNO3 of 2.0 mol/L, acid leaching time of 2.0 h, and acid leaching temperature of 293K. The detections on X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and BET surface area (SBET) indicated that the synthesized functional adsorbents were characterized by mesoporous materials. The good fitting of adsorption process using pseudo-second-order and Langmuir models demonstrated that the chemisorption contributed to MB removal. The results of thermodynamics further revealed that the adsorption process of MB occurred spontaneously due to the exothermic properties. The work is expected to develop a novel and cost-effective strategy for the safe disposal of FS, and potentially offer an alternative pathway to increase the additional value for the coal chemical industry.

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Section: Introductionmentioning

confidence: 99%

Using One-Step Acid Leaching for the Recovering of Coal Gasification Fine Slag as Functional Adsorbents: Preparation and Performance

Shen

et al. 2022

IJERPH

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“…Coal gasification fine slag is one of the coalbased solid wastes generated in the coal gasification process, and the cumulative annual output of coal gasification fine slag adds up to hundreds of millions of tons. 1,2 The existing treatment of fine slag is mostly discarded in landfilling and stacking, which not only increases the transportation cost and occupies the land, but also the environmental problems brought by longterm landfilling and stacking are not in line with the sustainable and green development goals. 3,4 Consequently, it is highly imperative and significant for fine slag to achieve resource utilization.…”

Section: Introductionmentioning

confidence: 99%

Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Jia

Qiu

et al. 2022

Intl J of Energy Research

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In this paper, the co-combustion characteristics of the carbon-rich fraction from coal gasification fine slag and corn straw char were investigated. The combustion performance of the blend was studied by TGA, and the properties of bottom ash samples were evaluated by XRD, SEM-EDS, and ICP-MS. The results showed that the addition of corn straw char (CC) to carbon-rich fraction (RC) can improve the combustibility of RC. The kinetic reaction mechanisms of the blend combustion were described by the diffusion model and chemical reaction order model (D1 and O3). The 40%RC case was recommended because of the lowest reaction activation energy. Hematite (Fe 2 O 3 ), quartz (SiO 2 ), anhydrite (CaSO 4 ), and diopside (Ca(Mg, Al)(Si, Al) 2 O 6 ) were the main mineral compounds in the RC-CC ash. With different compounding ratios of RC-CC, significant variability was observed in the degree of denseness and aggregation on the surface of the blend combustion bottom ash. The heavy metal concentrations (V, Cr, Ni, As, Cd and Pb) in the ash were tested to be in accordance with Chinese soil environmental quality standards, and the co-combustion process had a positive impact on the enrichment of V, Cr, and Ni in the bottom ash to some extent. The results obtained can make a reference for the synergistic utilization of RC-CC, and the treatment and reuse of combustion bottom ash samples.

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Structural properties of residual carbon in coal gasification fine slag and their influence on flotation separation and resource utilization: A review

Han,

Zhou,

Zhang

et al. 2024

Int J Miner Metall Mater

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Water distribution and adsorption behaviors of two typical coal gasification fine slags from Ningxia Region

Cited by 13 publications

References 33 publications

Using One-Step Acid Leaching for the Recovering of Coal Gasification Fine Slag as Functional Adsorbents: Preparation and Performance

Using One-Step Acid Leaching for the Recovering of Coal Gasification Fine Slag as Functional Adsorbents: Preparation and Performance

Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Structural properties of residual carbon in coal gasification fine slag and their influence on flotation separation and resource utilization: A review

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