of ash‑spun laments by pressure‑induced phase separation control in supercritical high ‑density polyethylene solution Jae‑Hyung Wee1, Younghwan Bae1, Nam Pil Cho1,2, Moo Sung Kim3, Won Jun
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In the present paper a novel process of the coal ash treatment was developed and analyzed: a high-pressure autoclave HCl leaching of the coal bottom and fly ash from an Omsk coal-fired power plant. This process was applied to extract aluminum from the coal ash into a chloride solution, which can further be used as a coagulant for water
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· Ultra high pressure contact forming technology. • Preparation of high performance building materials from aluminum ash and carbide slag. • The compressive strength and flexural strength of bricks are 75 MPa and 3.6 MPa respectively. • It provides a feasible idea for
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· plants to ash ponds which could be as far as 10-15 kms at concentrations between 10. to 50% (by weight) with majority of the pipelines operating below 20% concentration. (by weight). These systems
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· The ash bridge is found to contain high-density ash anchors that are difficult to remove, and the middle-channel ash bridge will reduce the storage capacity of DPF, increase the pressure drop, and cause frequent active regeneration (Kamp et
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Coal fly ash (CFA) is a waste that forms via coal combustion in thermal power stations. CFA consists of numerous components, whose recovery can address environmental and resource concerns associated with sustainable development. Most of the alumina (Al2O3) and rare-earth elements (REEs) in CFA are contained in the amorphous glassy mass
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The effects of silicon oxide additive on the transformation characteristics of sodium and sulfur in coal ash under atmospheric and elevated pressure were investigated in this study. The results indicated that silicon oxide additive significantly inhibited the release of sodium under high pressure. The sodium content in ash with 4% of silicon oxide additive was
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The compressive strengths and hydration products was investigated of oil well cement mixed with fly ash at ultra-high temperatures. Cured at 150°C, the strength for test samples
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· The steam gasification measurements under isothermal conditions and at an elevated pressure of tire-char with the addition of 0, 5, 10 and 15 wt% of sunflower husks ash were performed using thermovolumetric laboratory equipment presented in
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· fly ash under high temperature an d pressure Fig. 9-EDX analysis of samples having 10% fly a sh. Fig. 10-Image of having 20% fly ash sample (a) 35 × SEM image (b) 5000× SEM image.
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· This paper deals with the recovery of gold from waste printed circuit boards (WPCBs) ash by high-pressure oxidative leaching (HPOL) pre-treatment and iodide leaching followed by reduction precipitation. Base metals present in WPCB ash were removed via HPOL using a diluted sulfuric acid solution at elevated temperatures.
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2019 Volume 13 Issue 6High-volume ground bottom ash (GBA) was utilized as cement substitution in combination with fly ash (FA) and nano-silica (NS) for producing HPC with compressive strength of
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· High pressure oxi dative leaching as a pretreatm ent for recycling of base metals from the WPCBs ash was conducted at different temperatures ranging from 100 to 180 °C using a laboratory-scale
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The different types of ash handling systems are: 1. Hydraulic System. This System is used for larger power plants. The ash from the furnace falls into a water system that has a high velocity and carries the ash to sumps. Here, the water and ash are separated.
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· The fully transient model is suitable for high-pressure combustion of high ash coal/char and incorporates intrinsic reaction kinetics, mass and heat transfer limitations including variation in effective diffusivities and pore
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· Sequential extraction procedures and the high-pressure digestion method were selected to determine the element constituents of fly ash samples. Sequential extraction is one of the most useful methods used to measure the various elements from municipal solid waste incineration ash and contaminated soils.
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· Citation: GU Zhiqiang, YANG Yueqing. High pressure compression technology development and engineering for fly ash from municipal solid waste incineration[J]. Chinese Journal of Environmental Engineering, 2019, 13(6): 1457-1462. doi: 10.12030/j.cjee.201808065
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· The higher concentration of carbon in BBA towards a possibly unproductive fuel usage can diminish ash stabilization and causes the ash formation increases [110]. The option of recycling of BBA may improve the combustion efficiency and ease the ash management [ 101 ].
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· Based upon the calcium content, European and American standards classify fly ash as follows: low calcium fly ash ≤10%, medium calcium fly ash 10–20%, and high calcium fly ash >20%. (25) However, few papers focus on the content and transformation of calcium-bearing minerals in the Lurgi gasification ash with different particle sizes.
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Stringent leaching conditions including high pressure, temperature, and chemical consumption limit the extraction of valuable metals from circulating fluidized bed-derived high-alumina fly ash (CFB-HAFA) via the acid leaching method. In the present study, a complex utilization of CFB-HAFA, including the extraction of valuable metals (Al, Li, and
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· Worldwide, billions of masonry-burnt clay bricks are made each year. However, their manufacturing is not eco-friendly. The present study aims to create geopolymer brick made from fly ash, a sustainable substitute for brunt clay brick. The influence of forming pressure (FP), sand-to-precursor ratio (S/P) and liquid-to-solid ratio
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Stringent leaching conditions including high pressure, temperature, and chemical consumption limit the extraction of valuable metals from circulating fluidized bed-derived
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· High concentration slurry disposal pipelines are now being increasingly preferred for the transportation of coal ash slurries in the thermal power plants. Thus, the focus of the present paper is to establish the effect of area ratio on the pressure drop across wear-resistive converging-diverging pipe bends at high concentrations (C w ≥ 60% by
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Formulation determination and performance study of high-volume fly ash-based grouting fire extinguishing materials Author links open overlay panel Huiping Song a b, Fang Wei a, Fangqin Cheng a b, Dedan Duan a, Haibin Wu a b, Yangyan Gao a, Wenjun Li c
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· DOI: 10.1016/j.conbuildmat.2022.129526 Corpus ID: 253197060 Comprehensive performance study of aluminum ash and calcium carbide slag for brick making under ultra-high pressure @article{Ren2022ComprehensivePS, title={Comprehensive performance study
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· The bottom ash has a slightly higher content of SiO 2, Al 2 O 3, and TiO 2, whereas higher concentrations of remaining compounds, such as CaO, MgO, P 2 O 5, etc., are observed in fly ash. A lower fraction of compounds of alkali and alkali earth metals, such as Na, K, Ca, Mg, suggest the low catalytically active nature of the ash.
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· Synthesis of high specific surface area silica aerogel from rice husk ash via ambient pressure drying December 2017 Colloids and Surfaces A Physicochemical and Engineering Aspects 539 DOI:10.1016
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· Studies in a pressurized drop tube furnace have demonstrated that under high pressure the char is more porous (Wu, Bryant, and Wall 2000) and readily fragments, generating finer ash particles
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In the present paper a novel process of the coal ash treatment was developed and analyzed: a high-pressure autoclave HCl leaching of the coal bottom and fly ash from an Omsk coal-fired power plant. This process was applied to extract aluminum from the coal ash into a chloride solution, which can further be used as a coagulant for water treatment.
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