Almost 24% of crude lignite (5% w/v) was solubilized within 14 days under slightly alkaline conditions (pH 8.2). FTIR analysis revealed various functional groups in the obtained biosolubilization products.
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Abstract Lignite is a low-quality energy source which ac-counts for 13 % of China's coal reserves. It is imperative to improve the quality of lignite for large-scale utilization. To further explore and …
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Utilization of lignite coal ash and steel slag in fly ash brick manufacturing: A review. ... The te st specimen is taken fr om lignite therm al plant which is located in Neyveli,
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As high-quality coal continues to be mined, China's coal reserves continue to decrease (Safaei-Farouji et al., 2023; Wang et al., 2022), which has led to increased development and utilization of low-rank coal (Brooks et al., 2023; Hu et al., 2023; Wu et al., 2023). Lignite was an inferior coal with the lowest degree of coalification (Li et al ...
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Investigations on lignite ash utilization based on a stabilized ash from Germany • Combination of ash pre-treatment, leaching and utilization approaches • High extraction of the elements Al, Ca, Fe, Mg, Mn, V, Zn, Zr and for some REE achieved • Ash and residues from ash leaching are potentially utilizable in water treatment and ...
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Lignin, a major component of lignocellulosic biomass, is crucial to plant growth and development but is a major impediment to efficient biomass utilization in various processes. Valorizing lignin is increasingly realized as being essential.
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Critical factors were identified for reducing the environmental and economic impacts of lignite drying and compression technology. These findings provide useful inputs for both industrial practice and policy making for exploitation, …
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In the present study, Fe 3 O 4 (∼25.1 nm) supported on KOH-activated lignite (A−L) displayed 8 times higher phosphate removal than pristine A−L (67.6 mg/g vs. 8.5 mg/g at pH 5, 50 mg of absorbent in 25 mL of 1500 ppm [phosphate]), owing to its abundant Fe 3 O 4 (10 wt% of Fe) nanoparticle content.
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Abstract Lignite is a low-quality energy source which ac-counts for 13 % of China's coal reserves. It is imperative to improve the quality of lignite for large-scale utilization. To further explore and analyze the influence of various key pro-cesses on the environment and economic costs, a …
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The gasifier types of lignite's gasification can be divided into fixed bed, fluidized bed and entrained bed gasifiers (Fig. 3) (Dai et al., 2023).Fixed beds (lump coal) are technically mature and include atmospheric fixed beds (UGI), pressurized fixed beds (Lurgi furnace, Lurgi), and modified versions of fixed beds (BGL) (Vijayaragavan and Sarma, 2015).
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Ahlada lignite (AL) was of low quality, with a calorific value of 8.9 MJ/kg. The biomass materials, ginning cotton waste (GCW) and pine needles (PN) had calorific values 16.6 MJ/kg and 20.1 MJ/kg, respectively.
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In the present study, Fe 3 O 4 (∼25.1 nm) supported on KOH-activated lignite (A−L) displayed 8 times higher phosphate removal than pristine A−L (67.6 mg/g vs. 8.5 mg/g at pH 5, 50 mg of absorbent in 25 mL of 1500 ppm [phosphate]), owing to its abundant Fe 3 O 4 (10 wt% …
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2018, Fuchida et al., 2020, Taylor et al., 2018). Fly ash (FA) is a gray powder, the nest of coal ash particles, pro- duced in thermal power plants, mostly consisting of silt-sized and clay-
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In this effort, we explore the acid leaching behavior of REEs in Fort Union lignite coals of North America, some of which have been found to have exceptionally high REE content that would …
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Almost 24% of crude lignite (5% w/v) was solubilized within 14 days under slightly alkaline conditions (pH 8.2). FTIR analysis revealed various functional groups in the obtained …
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At the same time, lignite is the largest coal resource in Inner Mongolia, but its low calorific value and high moisture limit the combustion, pyrolysis and gasification of lignite . Dong et al. studied the effect of lignite addition on the DOM (dissolved organic matter) spectral characteristics of sheep manure organic fertilizer. Adding lignite ...
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Lignin, a major component of lignocellulosic biomass, is crucial to plant growth and development but is a major impediment to efficient biomass utilization in various processes. Valorizing lignin is increasingly realized as …
WhatsApp: +86 18221755073
For existing solid fuel combustion plants, a partial replacement of coal with biomass from wood or agriculture waste is applied. In this paper the effect of alkaline conversion of mixed coal and biomass ash to produce carbon sequestration sorbents was studied.
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At the same time, lignite is the largest coal resource in Inner Mongolia, but its low calorific value and high moisture limit the combustion, pyrolysis and gasification of lignite . …
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Investigations on lignite ash utilization based on a stabilized ash from Germany • Combination of ash pre-treatment, leaching and utilization approaches • High extraction of the …
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In this effort, we explore the acid leaching behavior of REEs in Fort Union lignite coals of North America, some of which have been found to have exceptionally high REE content that would be attractive targets for a commercial recovery process (i.e. …
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For existing solid fuel combustion plants, a partial replacement of coal with biomass from wood or agriculture waste is applied. In this paper the effect of alkaline conversion of mixed coal and …
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Critical factors were identified for reducing the environmental and economic impacts of lignite drying and compression technology. These findings provide useful inputs for …
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Buyukada M. et al. Utilization of apricot seed in (co-)combustion of lignite coal blends: Numeric optimization, empirical modeling and uncertainty estimation. Fuel (2018) ... Lignite (AL), with a calorific value of 5.9 MJ/kg is the most abundant low-rank coal used widely in power generation. AL's combustion and pyrolysis characteristics were ...
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Previous studies have demonstrated the utilization of lignite fly ash Na bearing synthetic zeolitic materials for the removal of heavy metals from wastewater (e.g. Koukouzaset al., 2010), for mine ...
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Lignites are widely available and cost-effective in many countries. Sustainable methods for their utilization drive innovation, potentially advancing environmental sustainability and resource efficiency. In the present study, Fe3O4 (∼25.1 nm) supported on KOH-activated lignite …
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Economic viability of AMD neutralization and clean-up processes depends on several other factors, besides the effectiveness, of which the cost is the most significant, i.e., the cost of sieving or grinding (e.g. Itskos et al., 2010), of chemicals in the case of the coal fly ash utilization and of energy consumption when fly-ash modified ...
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utilization of lignite: lignite pyrogenation and coking, lignite gasification, liquefaction and extraction of humic acid from lignite (Michael et al., 2009), the microbial degradation of lignite was regarded as a clean and efficient method which provides a good way …
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In this paper, utilization of fly-ash as a value-added product of agriculture is reviewed with the aim of helping opening up the usage of fly-ash and reducing the environmental and economic impacts of disposal. ... Topac et al. [129] used lignite fly-ash as an additive in three different alkaline stabilization processes and tested the effects ...
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OCBDs such as >C ar-O-C ar <, >C al-O-C ar <, and >C al-O-C al < are common in lignite, where C ar and C al refer to aromatic carbon and aliphatic carbon, respectively [16], [182], which has a certain similarity with the macromolecular structure of lignin. In addition, the obtained derived bio-oils and coal tars are both complex mixtures ...
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