large reserves of coal in tabas region of iran are characterized by low ash and high caking index, suitable for use in metallurgy as coking coal. however, these coals cannot be gainfully utilized because of their high sulfur content. in this work, studies on desulfurization of tabas coals were carried out in a batch reactor using various reagents. the most effective reagents, fe2(so4)3 , fecl3 ...

Coal is a porous medium with complex pore structures. The characteristics of the pore structure play an important role in various aspects of coal use, including extraction of methane from coal seams, CO2 sequestration in coal, and water purification by activated carbon. To describe comprehensively the pore structure of coal, we apply transmission electron microscopy (TEM) and synchrotron small-...

In the steel industry, promoting use of low-grade coal is important because depletion coking coal. To compensate for lack caking property low-quality coals, binders must be added to produce coke from blends. Lignin an aromatic polymer and one main components, accounting 30% wood. The chemical structure characteristics lignin differ depending on raw woody biomass extraction method used. this stu...

separation method that is widely used in coal beneficiation for the separation of fine coal particles from associated minerals in water slurries. Since the cumulative recovery of a component in the concentrate is proportional to flotation time, the flotation process can be considered as a time-rate recovery process (Emad, Mohammad, and Bahram, 2010). Therefore, the general mathematical flotatio...

An improved flexible solar-aided power generation system (SAPG) for enhancing both selective catalytic reduction (SCR) de-NOx efficiency and coal-based energy efficiency of coal-fired power plants is proposed. In the proposed concept, the solar energy injection point is changed for different power plant loads, bringing about different benefits for coal-fired power generation. For partial/low lo...

Several studies on Phase I of the Title IV SO2 Trading Program have found that actual compliance costs realized by the electric power industry have far exceeded the least-cost outcome in spite of allowance prices being much lower than expected. Prior work has either conjectured or shown that some of these excess costs could be a result of inefficiencies related to state regulatory constraints, ...