قائمة الطعام
Biomass burning is an important source of brown carbon (BrC) which poses high-risk threats to human health and the environment. In this study, bio-coal briquette (coal mixed with biomass), a promising solid fuel for residential combustion, is proven to be a clean fuel which can effectively reduce BrC emission. First of all, an orthogonal …
The process of briquetting involves compressing the feed material under pressure, and the briquettes are removed from the machine by applying force through the piston rods. Then, the briquettes were taken out and dried up under sunlight for the removal of moisture as well as to gain strength.
The thermal behavior of ash components in two bituminous coal samples was investigated under air and argon atmospheres in the temperature range of 800–1200 °C using thermal gravimetric–differential thermal analysis, X-ray diffraction transmission electron microscopy (TEM), and TEM–energy dispersive X-Ray spectrometry …
Sulfur fixation characteristics of single coal briquette particle during the process of combustion in different atmospheres ... is effective in removing sulphur in coal and also the types of organisms that should be according to the organic sulphur type in coal. Expand. 1. 2 Excerpts ... The combined effect of desulfurization and ash removal in ...
In an attempt to produce strong briquettes from coal wastes, molasses and coal tar pitch were blended as binder by Zhong et al. 15. The best briquette produced was reported to have a compressive ...
For low sulfur content ores, YU et al. have shown that the process of direct reduction followed by magnetic separation is able to desulfurize a low-grade iron ore-coal briquette by forming ...
The effects of leaching subbituminous coal samples from Boragolai and Ledo collieries of Makum coal field, Assam, India, with aqueous sodium hydroxide solution on removal of ash and sulphur, were investigated. Mild alkali treatment for relatively short period leads to removal of ash from the coal samples. Increase of alkali concentration …
The addition of saw dust as well as molasses as a binder results in a briquette with a calorific value of 26 MJ/kg and fixed carbon of 76%. This coal-saw dust-molasses briquette is of high compressive strength of 0.25 kN/cm 2 and is not easily shattered. The addition of Ca (OH) 2 is critical for sulphur removal in the briquette.
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Sulfur fixation characteristics of single coal briquette particle during the process of combustion in different atmospheres | Semantic Scholar. DOI: …
The addition of saw dust as well as molasses as a binder results in a briquette with a calorific value of 26 MJ/kg and fixed carbon of 76%. This coal-saw dust-molasses briquette is of high compressive strength of …
Small domestic cooking furnaces are widely used in China. These cooking furnaces release SO 2 gas and dust into the atmosphere and cause serious air pollution. Experiments were conducted to investigate the effects of vermiculite, limestone or CaCO 3, and combustion temperature and time on desulphurization and dust removal during briquette …
As one of the clean coal technologies, coal briquette is made of coal fines with sulfur fixation agent and binders under pressure of 4 Mpa, which can effectively …
Co-carbonization of weakly caking coal and zinc-containing dust to prepare highly reactive ferro-coke and collaboratively recover zinc powder is one of the feasible ways for steel enterprises to recycle zinc-containing dust. The pyrolysis mass loss behavior of adding blast furnace dust with different zinc contents to different ferro-coke materials …
DFT combined with XPS to investigate sulfur removal and sulfur-fixation mechanisms of copper oxide during coal pyrolysis and semi-coke combustion | Semantic Scholar. …
After the moisture removal process, the major reaction starts, including devolatilization and char combustion. The peak related to the coal reactions, the so-called one-step reactions, was broad and no significant peak temperature occurs, in contrast to the case of biomass. ... Bio-coal briquettes had better reactivity than bituminous and ...
sulfer removal process from coal briquette. sulfur coal - an overview sciencedirect topicsthe sources are burning coal and oil, especially high sulfur coal from eastern us, and industrial this process involves molten media gasification where both caking, high ash and high sulfur coal can be gasified. . …
An alternative laterite nickel ore processing using sulfuric acid as a leaching agent to produce class 1 nickel as a raw material for electric vehicle batteries produces natrojarosite residue as a by-product during the precipitation of iron and aluminum step. The natrojarosite residue contained iron and high sulfur, which is challenging to utilize as an …
Results of the briquette characterization showed that the briquettes produced with the compositions: 20–70% coal, 2–8% limestone, 10% plastic waste, 2.5–10% cassava flour and 10–60% biomass were of medium to high quality in terms of burning and cooking characteristics, smokelessness, environmental friendliness, binding …
Coal treated by the system was made into honeycomb briquette and burnt in a domestic coal stove, where a sulfur fixation rate of 74.97 % was obtained, compared to that of 4.55 % from untreated ...
Clean coal briquette is one of the most effective techniques to remove SO2 from coal combustion by using sulfur-retention agent to retain sulfur in coal residuals. Ca(OH)2 has been proved to be an ...
Briquetted biomass, like sugarcane bagasse, a by-product of sugar mills, is a renewable energy source. This study aimed at the production and characterization of bagasse briquettes. The production of briquettes was carried out with different blending ratios (5, 10, and 15%) and average particle sizes (0.75, 2.775, and 4.8 mm) with …
Waheed and Akogun studied the combustion indices of raw cornhusk and cassava peel briquette blends, and they reported that the fuel ratio of the raw briquette blend was less than that of coal; hence, it cannot be used as fuel in coal engines. Fortunately, the briquettes produced with the blend of the biomass feedstocks torrefied …
Sintering requires the intensive use of coal heated to a temperature of 1300 o C. Vale's briquette, however, is considered to be cold-agglomerated. In its production there is no burning, but rather a drying process at a temperature between 200 and 250 o C, requiring less energy. The product also reduces emissions of particulates and gases ...
This study used both experiments and numerical simula- tion by the discrete element method to clarify factors affect- ing the briquetting process of a packed bed of coal particles. The focuses were the loading and unloading test of the packed bed, and the changes in the structure and the stress during compression.
Abstract. Fixing sulfur in ash is an important way to reduce SO 2 emission from coal combustion. The main purpose of the research is to investigate the …
briquette formulations like case of coal briquetting so as to reduce the sulphur content in the coal. For this reason, no extra apparatus is required for reduction in emissions, which results in reduction in operating and investment costs [18]. Pollution from total suspended particles is also prevented by briquetting process [19].
Ash in Guiding subbituminous coal (GSBC) was removed by treatment with dilute acids. The treated GSBC (TGSBC) was extracted with isopropanol (IP) to afford IP-extractable fraction (IPEF). TGSBC was sequentially extracted with petroleum ether, carbon disulfide, acetone, and methanol. Octane-1-thiol and thiophene were selected as model …
Similarly, the hollow shape of charcoal and biomass briquette is prepared using the base plate with rod shown in Fig. 1 (b) along with the die and plunger by following the same procedure. Also, the charcoal briquettes are prepared by adding starch as resin with the mass proportions of 75% charcoal and 25% resin.
Sulfur dioxide (SO 2) and trace metal such as mercury emission during combustion of low-rank coal cause a significant impact on the environment and health.Flue gas at coal-fired power stations is one of the main sources for the emissions of SO 2 and mercury metal. Low-cost and sustainable technologies for the removal of SO 2 and …
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