Clean fuel-magnesia bonded coal briquetting

Tosun, Yıldırım İsmail

doi:10.1016/j.fuproc.2007.05.008

Cited by 14 publications

(5 citation statements)

References 3 publications

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“…Some researchers were interested in binderless coal briquette making [1][2] while the other were focused on coal briquettes produced from coal and chemical binding agent. Examples of the binder according to their researches were asphalt [3] , potassium [4] , magnesia [5] , ammonium nitrohumate [6] and commercial pitch [7] .…”

Section: Introductionmentioning

confidence: 99%

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Wilaipon¹

2008

American J. of Applied Sciences

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One of the most important crops in Phitsanulok, a province in Northern Thailand, is maize. Base on the calculation, the quantity of maize cob produced in this region was approximately 220 kton year^-1. The net heating value of maize cob was found to be 14.2 MJ kg^-1. Therefore, the total energy over 874 TJ year^-1 can be obtained from this agricultural waste. In the experiments, maize cob was utilized as the major ingredient for producing biomass-coal briquettes. The maize cob was treated with sodium hydroxide solution before mixing with coal fine. The ratios of coal:maize were 1:2 and 1:3, respectively. The range of briquetting pressures was from 4-8 MPa. The result showed that the density was strongly affected by both parameters. Finally, the relationship between biomass ratio, briquetting pressures and briquette density was developed and validated by using regression technique

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Section: Introductionmentioning

confidence: 99%

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Wilaipon¹

2008

American J. of Applied Sciences

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“…The most important feature of a solid fuel is its calorific value (Fisher and James, 1995;Tosun, 2007). It determines the commercial value of the fuel.…”

Section: Chemical Characteristics Of the Briquettesmentioning

confidence: 99%

Physical and Chemical Properties of Beet Pulp/Mezino Bituminous Coal Briquettes

Zanjani

Moghaddam

Dorosti

2013

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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This work studies the effect of adding beet pulp on the properties of coal briquettes in the presence of tar. The effects of moisture, composition of briquettes, and briquetting pressure were studied on their water resistance index and compressive strength. The amounts of ash and sulfur content were reduced by pre-treatment of coal and adding biomass. Briquettes containing beet pulp had lower calorific value than free biomass briquettes, but it was in an acceptable range. The highest compressive strength and water resistance were achieved in the samples containing a beet pulp to tar content ratio of 25/5 to 20/10 and 8% water prepared at 15 tons briquetting pressure. Briquettes containing beet pulp have higher compressive strength than briquettes containing sawdust.

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“…Third, some research has been directed at improving the properties of the briquettes, such as maintaining ignitability while keeping volatile matter low or reducing smoke and sulfur emissions during combustion. Therefore, through briquetting, low-grade coal can be upgraded and used. − In addition, it can be made smokeless for applications where this is necessary, such as cooking. This contrasts to raw coal, which can be highly friable, difficult to handle, and emits offensive and potentially harmful smoke.…”

Section: Low-grade Coal Upgrading Technologiesmentioning

confidence: 99%

“…Therefore, through briquetting, low-grade coal can be upgraded and used. [13][14][15][16][17] In addition, it can be made smokeless for applications where this is necessary, such as cooking. This contrasts to raw coal, which can be highly friable, difficult to handle, and emits offensive and potentially harmful smoke.…”

Section: Coal Briquettingmentioning

confidence: 99%

Low-Grade Coals: A Review of Some Prospective Upgrading Technologies^†

Katalambula¹,

Gupta²

2009

Energy Fuels

187

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Low-grade coals are usually those that are low in specific energy because of high moisture content and/or ash content or produce high emissions of concern. These are commonly lignites or sub-bituminous coals. There is a growing need of using these low-grade coals because of higher quest for power generation. In general, the direct use of the low-grade coals results in higher costs of reducing emissions or in lower efficiency and, consequently, higher greenhouse gas emissions. In the present carbon-constrained environment, there is a need of upgrading these coals in terms of moisture, ash, and/or other trace elements. There are a number of upgrading technologies. The current paper reviews these technologies mainly categorized as drying for reducing moisture and cleaning the coal for reducing mineral content of coal and related harmful constituents, such as sulfur and mercury. The earliest upgrading of high-moisture lignite involved drying and manufacturing of briquettes. Drying technologies consist of both evaporative and non-evaporative (dewatering) types. The conventional coal cleaning used density separation in water medium. However, with water being a very important resource, conservation of water is pushing toward the development of dry cleaning of coal. There are also highly advanced coal-cleaning technologies that produce ultra-clean coals and produce coals with less than 0.1% of ash. The paper discusses some of the promising upgrading technologies aimed at improving these coals in terms of their moisture, ash, and other pollutant components. It also attempts to present the current status of the technologies in terms of development toward commercialization and highlights on problems encountered. One thing that is obvious is the fact that, despite the presence of all these techniques, still the upgrading goal has not been realized adequately. It can therefore be concluded that, because reserves for low-grade coals are quite plentiful, it is important to intensify efforts that will make these coals usable in an acceptable manner in terms of energy efficiency and environmental protection.

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Clean fuel-magnesia bonded coal briquetting

Cited by 14 publications

References 3 publications

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Physical and Chemical Properties of Beet Pulp/Mezino Bituminous Coal Briquettes

Low-Grade Coals: A Review of Some Prospective Upgrading Technologies^†

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Clean fuel-magnesia bonded coal briquetting

Cited by 14 publications

References 3 publications

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Density Equation of Bio-Coal Briquettes and Quantity of Maize Cob in Phitsanulok, Thailand

Physical and Chemical Properties of Beet Pulp/Mezino Bituminous Coal Briquettes

Low-Grade Coals: A Review of Some Prospective Upgrading Technologies†

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Low-Grade Coals: A Review of Some Prospective Upgrading Technologies^†