نتایج جستجو برای: sub bituminous coal sbc
تعداد نتایج: 241192 فیلتر نتایج به سال:
Knowledge about ignition processes of coal in fluidized beds is of importance for the start-up and dynamic control of these combustors. Initial experiments in a transparent fluidized bed scale model showed the existence of a considerable induction period for the ignition of char, especially at low bed temperatures (e.g., 800-950K for bituminous coal). This paper focuses on char-ignition delay a...
Abstract. Coal has certain physical and chemical properties, from these properties coal can be used as a parameter to determine classification based on rank. Balang Island is coal-bearing formation in the Kutai Basin. To depositional environment, samples were taken. From sample, characteristics such water content, volatile matter, calorific value, maceral mineral composition produced. character...
Graphitic carbons from the combustion of bituminous coals and, perhaps, other coal ranks, tend to capture iron and a number hazardous elements, including As, Hg, Se. Rare earth elements in fly ashes occur minerals, such as monazite, xenotime, davidite. They also sub-nm particles, probably mineral form, within Al–Si glass on investigated ashes. Just graphitic can Fe surrounding ash magnetic part...
Differential scanning calorimetry (DSC), temperature programmed desorption mass spectrometry (TPD-MS) and small angle neutron scattering (SANS) were used to investigate CO2 uptake by the Wyodak coal. Adsorption of carbon dioxide on Wyodak coal was studied by DSC. The exotherms evident at low temperatures are associated with the uptake of CO2 suggesting that carbon diox...
Brown carbon (BrC) draws increasing attention due to its effects on climate and other environmental factors. In China, household coal burned for heating and cooking purposes releases huge amounts of carbonaceous particles every year; however, BrC emissions have rarely been estimated in a persuasive manner due to the unavailable emission characteristics. Here, seven coals jointly covering geolog...
Continuous research on the clean and effective use of coal is still necessary as will continue to play a key role in global energy supply for foreseeable future. Hence, current study, optimisation in-furnace blending one Malaysia's opposed-firing utility boilers was numerically executed basis hydrodynamics combustion characteristics. The predicted FEGT from numerical model validated against act...
Grinding of a high volatile bituminous coal was performed in three comminution devices: Raymond Mill, Rolls Crusher and Ball Mill. The pulverised samples were sieved to obtain four particle size fractions and temperature-programmed combustion (TPC) was used for the evaluation of their combustion behaviour. In addition, three coals of different hardness and rank were mixed in various proportions...
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