...Yanan Miao; Guoliang Luan; Chaojie Zhao; Yong Li The adsorption behaviors of multiphase fluids in coal are vital for estimating their transfer and flow mechanisms. In this study, taking the classical coal structures as instances, the impacts of maturities and moisture contents of coal...

...Pritam Kumar; Barun Kumar Nandi This work presents the combustion characteristics of coal, petroleum coke (PC), rice straw (RS), mustard cake (MC), and their blends to assess the applicability of blended fuel for thermal power generation. Characterization results show that PC has the highest gross...

...M. Sözer; H. Haykiri-Acma; S. Yaman The higher heating value (HHV) of 84 coal samples including hard coals, lignites, and anthracites from Russia, Colombia, South Africa, Turkey, and Ukrania was predicted by multilinear regression (MLR) method based on proximate and ultimate analysis data...

... artificial, coal ash related oxidic slag systems were analyzed on their crystallization behavior. Therefore, their melt behavior was investigated via hot-stage microscopy and differential thermal analysis (DTA). Additional thermochemical calculations were performed to predict crystallized phases...

...Bonan Xu; Hanhui Jin; Hanqing Li; Yu Guo; Jianren Fan It is reported that a three-dimensional cross-linked macromolecular structure with heterogeneous inorganic and organic compositions widely exists in coal particles. The macromolecules usually represent the rank transition of more than 75...

...Vinoth Kumar Kuppusamy; Amit Kumar; Maria Holuszko With the supply restriction from traditional rare earth deposits, alternative sources of rare earth elements (REEs) such as coal are being studied. The United States National Energy Technology Laboratory has identified US coal deposits...

...Lulu Sun; Yanbo Zhang; Yue Wang; Qiqi Liu After coal seam mining, the residual coal is soaked with the accumulated water in goaf, and its spontaneous combustion characteristics were changed after air-dried. To study the reoxidation characteristics of soaked and air-dried coal, temperature...

...Lin Yang; Jing-yu Ran; Li Zhang There are much coal with low content of volatile matter (V ad < 20%), high content of ash (A ad > 50%), low heating caloric (∼10,000 kJ/kg) in China. It is very important to study pyrolysis performance of the coal to ensure high efficiency of utilization...

...Jian Ma; Oliver Hemmers The concept of cofiring (algal biomass burned together with coal or natural gas in existing utility power boilers) includes the utilization of CO 2 from power plant for algal biomass culture and oxycombustion of using oxygen generated by biomass to enhance the combustion...

... conservation effect is considerable; furthermore, it is better to use waste nitrogen to precool CBM than to liquefy it. adsorption coal energy resources liquefaction nitrogen coalbed methane liquefaction adsorption nitrogen residue pressure power consumption HYSYS Unit power...

...Jamal Daneshfar; Richard G. Hughes; Faruk Civan The rate of CO 2 production in many states, primarily from coal-fired power plants, is such that it only takes a few years to fill up any depleted oil and gas reservoirs. In order to reduce the level of CO 2 in the atmosphere and to minimize the cost...

...Chittatosh Bhattacharya Pulverizers play a pivotal role in coal-based thermal power generation. Improper coal fineness or drying reflects a qualitywise deterioration. This results in flame instability, unburnt combustible loss, and a propensity to slagging or clinker formation. Simultaneously...

...Lijie Cui; Wenli Song; Jiayuan Zhang; Jianzhong Yao; Weigang Lin Coal resource is abundant in China, while the reserves of natural gas and petroleum are limited. Due to the rapid increase in the number of automobiles, a competitive way to produce liquid fuels from coal is urgently needed in China...

... from mono-combustion were compared with those of co-combustion of the sludge with a bituminous coal. The effect of the addition of limestone was also studied in order to retain sulphur compounds and to verify its influence on the retention of heavy metals (HM). Heavy metals were collected and analyzed...

...Alan L. T. Wang; John F. Stubington; Jiangang Xu A bench-scale fluidized bed combustor with a novel fluidizing gas injection manifold was successfully built for characterization of Australian black coals under PFBC conditions. Instead of the usual horizontal distributor plate to support the bed...

...Hossein Jahediesfanjani; Faruk Civan Coalbed methane (CBM) reservoirs are characterized as naturally fractured, dual porosity, low permeability, and water saturated gas reservoirs. Initially, the gas, water, and coal are at thermodynamic equilibrium under prevailing reservoir conditions. Dewatering...

... Technologies Division for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY . Manuscript received by the FACT Division, May 2003; revised manuscript received January 2004. Associate Editor: C. T. Avedisian. 01 May 2003 01 January 2004 19 10 2004 combustion coal boilers fly...

... upward and downward motion in the bed and over the surface is required. This is provided by Stubington’s particle movement model 6 . In this model, it is assumed that particle movement is caused solely by bubbles and that a coal particle remains stationary in the bed until a bubble displaces it axially...

... modeling. The experimental facility is a Combustion Engineering corner-fired pulverized-coal boiler with a capacity of 606 MWe. Local gas temperature distributions, local radiative and total wall heat flux distributions, and stack NO x were measured during constant-load furnace tests under various...

...Hee-Joon Kim; Guo-Qing Lu; Ichiro Naruse; Jianwei Yuan; Kazutomo Ohtake A biocoalbriquette, a new artificial solid fuel, is manufactured by a mixture of coal and biomass under a high-compression pressure. The combustion characteristics of biocoalbriquettes were investigated in this study...