WEBOct 1, 2021 · The exothermic aluminium combustion reaction mainly supports the process of dissociation and disintegration of NO, NO 2, and NO x radicals. An increase in the amount of Al particles from % to 12% also led a decrease in hydrocarbon content (oil) from to wt% . The form of added aluminium also had an influence .
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WEBNov 1, 2015 · Feasibility study and economic assessment of changing chemical solvent of a high capacity gas treatment plant into a physical solventbased process with a correction scheme. Abstract Impure contents of natural gas like Hydrogen Sulfide (H2S) and Carbon Dioxide (CO2) should be removed in chemical plants before sending gas to downstream .
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WEBFeb 8, 2021 · The macropores reduce with an increase of coal rank while the mesopores and micropores increase with an increase in the ... Kaneko T, Tsuruya S (2004) Hypercoal process to produce the ashfree coal. Fuel Process Technol 85:947–967. Article Google Scholar Orem WH, Finkelman RB (2003) Coal formation and geochemistry. US .
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WEBJul 6, 2020 · In this post, I will cover how to use PowerShell to increase the disk size of a Windows 10 VM running in a VMware vCenter environment. Automating simple but time consuming tasks like this can save precious time for your support staff or yourself. There are two parts to accomplishing this task; first we need.
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WEBJul 27, 2020 · Catalytic coal gasifiion technology shows prominent advantages in enhancing coal gasifiion reactivity and is restrained by the cost of alyst. Two typical biomass ash additions, corn stalk ash (CSA, high K–Na and low Si) and poplar sawdust ash (PSA, high K–Ca and high Si), were employed to study the influence of biomass ash on .
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WEBOct 28, 2022 · Polymeric Additives. Polymeric additives, when added to polymers, make it possible to form useful compounds (called plastics), useful materials, with characteristics suitable for the manufacturing process and the use for which the final product is intended. Additives for plastics are subdivided into adjuvants and fillers.
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WEBJun 1, 2019 · Coal blend fluidity effects due to carbonisation tar addition showed a linear increase from 466 ddpm at 0 wt % to 491 ddpm at wt.%. It is well known, that coal blend fluidity is a nonadditive property and is considered as the superposition of the fluidities of the individual components at a specific temperature (Fernández et al., 2012 ...
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WEBMar 15, 2017 · These additives modify and accelerate Portland cement hydration process, change its physical characteristics and mechanical behaviour. There a number of studies investigating the use of silica fume, coal, zeolites and ash as concrete supplements (pozzolanic additives) [2], [3]. Zeolites contain a high content of SiO 2 and Al 2 O 3.
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WEBOct 15, 2019 · The throughput of highash and highsulfur finegrain coal (0–6 mm) increases year by serious problem of direct combustion is the formation of acid rain and, the precombustion desulfurization and ash reduction can reduce environmental pollution. A combined process of dry separation and microwave .
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WEBDualStage Drying Process of Lignite Using Pilot Scale Coal Rotary Dryer. In conventional rotary drying process, lignite is fed into the drum with rotaryvalve feeder and hot flue gas is injected ...
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WEBFeb 5, 2022 · Coal coke and biomass charcoal (Fig. S1) were utilized as auxiliary fuels. The coal coke (China) was produced by coking of coal to reduce volatile matter, while the biomass charcoal (Malaysia) was produced by high temperature carbonization of sawdust briquettes. Limestone (CaCO 3) was used as an additive to the furnace to adjust the .
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WEBApr 3, 2012 · Coaltar pitch and pitchpolymer compositions were carbonized and activated with steam at 800 °C to 50 % burnoff. ... The measurements were carried out in the range of temperatures from (−100) to 530 °C, with the temperature increase rate of 10 K/min, softening point by "Ring and Ball" method (SP) according to the PNEN 1427:2001 ...
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WEBJan 1, 2021 · extreme limits, the lowest and highest additive contribution to th e coal mixture, and the inf luence of the lowest and highest heating rate. For KLB9SCG1 case (90 % KLB – 10 % SCG), the high ...
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WEBJun 1, 2017 · Introduction. NO x emission standards over coalfired power plants have been implemented in the past decades around the world. Selective nonalytic reduction (SNCR) (Dao et al., 2010, Lee et al., 2005) is the most costeffective NO x emission control technology (Hwang et al., 2009). Compared with selective alytic reduction and other .
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WEBAug 10, 2022 · To optimize the anammox process for engineering appliions, scientists have investigated the role of exogenous additives. The addition of carriers maintains the sludge volume and facilitates the rapid startup of anammox ( Adams et al., 2020 ). Intermediates can inhibit miscellaneous bacteria ( Zhang et al., 2021a ).
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WEBMar 1, 2023 · The appliion of additives is generally considered to be an efficient and easytomaster strategy to promote the humifiion of composting and quickly caught the interest of researchers. This review summarizes the recent literature on humifiion promotion by additives in the composting process. Firstly, the organic, inorganic, .
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WEBUBC (upgrading brown coal) is a method of improving the quality of coal by using oil as an additive. Through processing in the oil media, not just the calories that increase, but there is also water repellent properties and a decrease in the tendency of spontaneous combustion of coal products produced. The results showed a decrease in the water .
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WEBDec 4, 2021 · Denitrifiion experiments of cocombustion of coal and additives were carried out in a horizontal tube furnace. The results showed that calcium acetate limited the production of NO2. The optimum calcination temperature of CTABZrTiO2 was 673 K. The denitrifiion efficiency reached up to %, and desulfurization efficiency reached .
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WEBSep 3, 2023 · The process of soil stabilization was introduced at the start of human settlement in ancient times. Ancient civilizations of the Chinese, Romans, and Incas utilized various methods to improve the strength of weak soil, some of these methods being so effective that their buildings and roads still exist today [37, 113].The unsuitable soil was .
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WEBJan 15, 2022 · Torrefied biomass is characterized as a highquality renewable energy commodity that can substitute fossil fuels. Combined torrefaction and pelletization are used to increase the value of biomass by improving its handling and fuel properties. The aim of this study is to present the influence of pelletization process on torrefaction in a pilot .
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Types of Coalderived Chemicals. The processes for production of specific chemicals from gasifiionderived syngas are typically proprietary systems using specialized process systems. In the following discussion, some of the processes for important chemicals such as formaldehyde, olefins, etc. are presented.
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WEBCylindershaped fuel pellets that were 3 mm in diameter and 3 mm in height, with a mass of 20 mg, were produced by compressing dry coal processing waste under the pressure of 5 MPa. The first group of pellets from coal dust with a particle size less than 140 µm did not contain any additives. The pellets of the second group of fuel compositions contained .
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WEBDec 1, 1990 · To increase the latent heat of ssPCMs, we create a mixture of 70% hexadecane (HD) or octadecane (OD) with 30% BS and combine this PCM mixture with our novelsolgel route to synthesize ssPCMs with high compressive strengths ( MPa, 5 °C) as well as high latent heats (160 J/g). ... However, dependence on coalbased energy .
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WEBMay 15, 2021 · The use of additives in anaerobic reactors to promote AD performance is a promising approach for addressing the current crisis ( Helenas Perin et al., 2020; Wang et al., 2020 ). As additives, trace elements are essential for ensuring a stable AD process and can be used to enhance biogas production ( Habagil et al., 2020 ).
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WEBmineral additives ( microsilica)—due to its very small particle size, SiO 2 penetrates the spaces between cement grains, filling the resulting micropores. Because of this, it increases its strength; cement additives ( aluminous cement)—used in specialised appliions, such as the production of heatresistant products, repair of concrete under chemically .
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WEBJun 17, 2022 · The supply of REDUXCO alytic additive with a flow rate of at least 100 mg/t of fuel into the primary air channels of the furnace burner and the air supply channels to the calciner helped to reduce the specific energy consumption of fuel by –% when using anthracite as fuel; for petroleum coke by –%; mixtures of coal and RDF ...
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WEBDec 1, 1999 · The composition and properties of pitches showed large variations with sulfur addition or temperature. The softening points of pitches modified with 10. wt.% S at 270°C and with 5 wt.% S at 310°C were too high to be measured by the ringandball method.. Solubility data show that the decrease in TS fraction was mainly ascribed to the .
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WEBDec 12, 2021 · To produce the highquality coal coke, the charge should meet the following requirements of main indiors: the ash content should not exceed 8–10%, the volatilematter yield should be within 26–30%, the sulfur content should not be more than –%, and the coal plastometric index should not be less than 15–17 mm. 15 The lack of .
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WEBMar 1, 2015 · Compared with no additive condition, NO removal efficiencies with Na 2 CO 3, KCl and NaCl are increased by, and percentage points at 950 °C respectively, and Na 2 CO 3 additive even results in an increase of NO reduction by up to percentage points at 850 °C, which suggests that the alytic ability of the three .
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WEBApr 27, 2022 · Introduction. The spontaneous combustion of coal is a major disaster in the mining, storage, and transportation chain of coal production, restricting the development of the coal industry [1,2].The spontaneous combustion of coal not only causes significant wastage of coal resources [3,4], but also leads to mine fires that vary the airflow in the .
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WEBMar 1, 2022 · The slags from coal blast furnaces (coke) have a large percentage of CaO to remove the present sulfur while those produced in charcoal blast furnaces have a low CaOSiO2 ratio.
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WEBJun 10, 2021 · The process utilizes NH 3 or urea as a reducing agent, which is only effective in a narrow and high temperature range with the maximum NO x abatement falling with the increase of the O 2 content. In large industrial boilers, the effectiveness of the deNO x process may be decreased with boiler load variations and excess O 2. This .
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WEBThe Direct Reduction of Iron. Thomas Battle, ... James McClelland, in Treatise on Process Metallurgy: Industrial Processes, 2014. Ash Fusion Temperature. Ash fusion temperature is the temperature at which the ash present in the coal begins to soften or melt. In general, a high ash fusion temperature is preferred, to avoid deposition of .
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