Effect of hydrothermal dewatering on the slurryability of brown coals
TL;DR: In this article, two brown coals from China were dewatered under hydrothermal dewatering (HTD) conditions at 250-320°C for 1h in a 2L autoclave.
About: This article is published in Energy Conversion and Management.The article was published on 2012-05-01. It has received 134 citations till now. The article focuses on the topics: Coal slurry & Coal water.
Citations
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TL;DR: In this article, the authors used the hydrothermal carbonization (HTC) process to convert sewage sludge into clean solid fuel without prior drying, and evaluated the fuel characteristics and combustion behaviors of hydrochars.
706 citations
TL;DR: In this article, mild hydrothermal (HT) conversion processes are used to produce clean solid biofuel from high moisture content waste biomass (bio-waste) with high nitrogen (N)/chlorine (Cl) content.
315 citations
249 citations
TL;DR: In this paper, the authors investigated the effect of the HT temperature and holding time on the biofuel recovering ratio, calorific value and energy recovery rate, in order to optimize the operating parameters and evaluate the energy efficiency of this fuel production process.
206 citations
Cites methods from "Effect of hydrothermal dewatering o..."
...The hydrothermal (HT) conversion, which involves the application 47 of heat and pressure to treat biomass in an aqueous medium, was verified as an effective way to densify the 48 energy content of moist biomass without thermal drying [8]....
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TL;DR: In this paper, the authors present recent development in drying and dewatering technologies for low-rank coals, such as rotary-drying, fluidized-bed drying, hot oil immersion drying and hot oil-immersion drying.
205 citations
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TL;DR: In this article, the authors examined the occurrence of volume flow and measured the gas effective permeability for selected Weyburn Midale caprock samples after the caprock was broken through by the injection of CO2.
272 citations
TL;DR: In this article, a review of the drying and cleaning technologies for low-grade coal is presented, 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.
Abstract: 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...
178 citations
TL;DR: In this article, the ion exchange properties of low-rank coals have been studied with a view to obtaining optimum conditions for the determination of carboxyl groups in the presence of phenolic groups.
166 citations
TL;DR: In this paper, the effect of coal properties on CWSs have been investigated using two Turkish coals of different ranks and a Siberian bituminous coal, and the results showed that coal-water slurries have a similar viscosity as water slurries.
161 citations
TL;DR: In this article, the equilibrium moisture content at 15% relative humidity for a Loy Yang Low Ash coal was the same within the limits of error as that obtained from an isotherm generated by a microbalance (Intelligent Gravimetric Analyser).
137 citations