Xem 1-20 trên 23 kết quả Coal combustion
  • Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "findings from the application of coal combustion by-products (ccb) for forest reclamation on spoil banks of the north bohemian brown coal basin"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf8p toshiba4 13-09-2011 21 3   Download

  • Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Forest reclamation of dumpsites of coal combustion by-products (ccb)...

    pdf8p toshiba3 09-09-2011 12 1   Download

  • This is a book about coal gasification and its related technologies. The relationship between these technologies is shown in Figure 0.1. The gasification process begins with a viable feedstock. In this book, we focus on one of those feedstocks that must go through the gasification process, coal.

    pdf0p chunganhbk 11-10-2012 48 21   Download

  • Prompted by the need of non-petroleum-based fuels, coal research has reemerged to center stage after a lengthy dormant period. Pyrolysis research, in particular, has gained considerable momentum because of its close connection to combustion, hydropyrolysis and liquefaction. Spectroscopic and other instrumental techniques are currently producing prodigious information about coal structure and pyrolysis mechanisms, while modeling efforts are breaking new ground in sorting out chemical and physical phenomena to provide a fundamental although simplified description....

    pdf177p dontetvui 21-01-2013 21 3   Download

  • The energy demand for the endothermic gasification reaction is met by the combustion of residual char in the fast bed combustor. The circulating bed materials act as heat carrier between the two fluidized beds and maintain the required temperature in gasifier. Therefore, the hydrodynamics of such a dual fluidized beds system needs to be thoroughly understood for successful design and operation of the system for industrial application.

    pdf74p contentnew 12-04-2012 44 17   Download

  • The two most important environmental hazards faced by humankind today are air pollution and global warming. Both have a direct link with our current overdependence on fossil fuels. Pollutants produced from combustion of hydrocarbons now cause even more health problems due to the urbanization of world population

    pdf626p tuyetmuadong2013 08-04-2013 43 12   Download

  • In relation to studies and understanding of broad energy and pollution management issues, the U.S. National Academies have had an on-going program of cooperation with the Chinese Academies (Chinese Academy of Sciences and Chinese Academy of Engineering) for a number of years. Joint study activities date to the late 1990s and led to the publication in 2000 of Cooperation in the Energy Futures of China and the United States. This volume was the first examination of the broad energy questions facing both nations at the turn of the new millennium. ...

    pdf335p tiramisu0908 25-10-2012 36 10   Download

  • Nature Coal is a dark brown to black sedimentary rock derived primarily from the unoxidized remains of carbon-bearing plant tissues. It is a complex, combustible mixture of organic, chemical, and mineral materials found in strata, or "seams," in the earth, consisting of a wide variety of physical and chemical properties.

    pdf14p liemthanh 16-12-2009 54 4   Download

  • The Blacksmith Institute’s database contains almost 350 sites contaminated with mercury, putting close to 10 million people at risk from the identified sites. It is the second most prevalent pollutant in the database. The top sources of mercury pollution are artisanal gold processing, mining and ore processing, coal mining, processing and localized air pollution related to coal combustion at poorly controlled sites, and chemical manufacturing, notably for older chlor-alkali plants making chlorine. Artisanal mining of gold ores and processing using mercury is common worldwide.

    pdf48p saimatkhauroi 01-02-2013 40 4   Download

  • Stable sulfur isotope ratios in combination with multi-element analysis of lichens were used to examine the influence of emissions from two coal-fired power plants in the Yampa Valley on pollutant deposition in the Mt. Zirkel Wilderness of northern Colorado (Jackson et al. 1996). Coal-fired power plants typically emit SO2 with a stable isotope ratio 34 S/ 32 S characteristic of the coal combusted.

    pdf78p saimatkhauroi 01-02-2013 23 4   Download

  • The objective of seismic design force of 400, 450 and 550 gal 0.16, 0.50 and 0.84 fractile hazard corresponding curves. It was confirmed that, even with the same model structure and objectives seismic design forces vary with differences in the probability of occurrence of earthquakes. The relationship between total costs and seismic forces in the 0.50 and 0.85 fractile hazard curves, the total cost at 750 gal locally low. This is because the seismic risk is very high at 650 and 700 gal.

    pdf288p lulanphuong 24-03-2012 16 3   Download

  • Coal formation has been described as “an inefficiency in the carbon cycle,” (Barghoorn, 1952) when carbon from plants remains in terrestrial sediments and is not recycled to the atmosphere (Figure 1.1.1). Coal is, by definition, a readily combustible rock containing more than 50% by weight and 70% by volume of carbonaceous material (Schopf, 1966). Another definition describes coal as a combustible solid, usually stratified, which originated from the accumulation, burial, and compaction of partially decomposed vegetation in previous geologic ages (Hendricks, 1945)....

    pdf381p aries23 29-09-2012 19 3   Download

  • Combustion Calculations Using the Million BTU (1.055 MJ) Method 3.1 Savings Produced by Preheating Combustion Air 3.4 Combustion of Coal Fuel in a Furnace 3.5 Percent Excess Air While Burning Coke 3.8 Combustion of Fuel Oil in a Furnace 3.9 Combustion of Natural Gas in a Furnace 3.11 Combustion of Wood Fuel in a Furnace 3.17 Molal Method of Combustion Analysis 3.19 Final Combustion Products Temperature Estimate 3.22

    pdf24p phuphong 09-12-2009 122 61   Download

  • Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 3 COMBUSTION Combustion Calculations Using the Million BTU (1.055 MJ) Method 3.1 Savings Produced by Preheating Combustion Air 3.4 Combustion of Coal Fuel in a Furnace 3.5 Percent Excess Air While Burning Coke 3.8 Combustion of Fuel Oil in a Furnace 3.9 Combustion of Natural Gas in a Furnace 3.11 Combustion of Wood Fuel in a Furnace 3.17 Molal Method of Combustion Analysis 3.19 Final Combustion Products Temperature Estimate 3.22 COMBUSTION CALCULATIONS USING THE MILLION BTU (1.

    pdf24p medinova 26-10-2010 79 43   Download

  • The major sources of indoor air pollution worldwide include indoor combustion of solid fuels, tobacco smoking, outdoor air pollutants, emissions from construction materials and furnishings, and improper maintenance of ventilation and air conditioning systems. Although some indoor air pollutants, such as environmental tobacco smoke, are of concern globally, profiles of indoor air pollutants and the resulting health risks are generally very different in developed and developing countries.

    pdf15p doipassword 01-02-2013 18 5   Download

  • Although MECS data report that coal supplied only 10 percent of the pulp and paper industry’s energy requirements in 2002, NEI data show coal as contributing to 43 percent of the sector’s energy-related CAP emissions. As MECS reports more than 50 percent of the sector’s energy coming from “other” fuels (which includes biomass), NEI data show that biomass (wood waste) is a less emissions-intensive energy source than coal. For wood products, combustion of wood/bark waste is the dominant energy-related source of CAP emissions.

    pdf16p loixinloi 08-05-2013 24 4   Download

  • Cement manufacturing is an energy-intensive process due to the high temperatures required in the kilns for clinkerization. The use of alternative fuels to replace conventional fuels, in particular coal, is a widespread practice and can contribute to improving the global warming impact and total environmental footprint of the cement industry.

    pdf89p loixinloi 08-05-2013 22 4   Download

  • Each stage in the life cycle of coal—extraction, transport, processing, and combustion—generates a waste stream and carries multiple hazards for health and the environment. These costs are external to the coal industry and are thus often considered “externalities.”We estimate that the life cycle effects of coal and the waste streamgenerated are costing the U.S. public a third to over one-half of a trillion dollars annually.Many of these so-called externalities are, moreover, cumulative.

    pdf6p taisaovanchuavo 26-01-2013 20 3   Download

  • More than half of the world's population relies on solid fuels, including biomass fuels (wood, charcoal, dung, agricultural residues) and coal, to meet their basic energy needs. Cooking and heating with solid fuels on open fires or traditional stoves results in high levels of indoor air pollution. Globally, indoor air pollution is responsible for approximately 1.6 million deaths every year. Various interventions are available to reduce indoor air pollution and associated health impacts at the household level.

    pdf8p doipassword 01-02-2013 15 3   Download

  • Areas with high concentrations of air-borne particulate matter are more likely to experience fogs, because these particles are preferred nucleation sites for water droplets. Smoke and soot are also very undesirable aesthetically. Soot is formed during combustion when the supply of oxygen is insufficient for complete conversion of carbon to carbon oxides. Its formation is mainly a problem in the combustion of liquid and solid fuels (oil, coal, or wood), because molecular-scale mixing of fuel and oxygen is not as easy here as it is in the combustion of natural gas (see below).

    pdf23p tainhacmienphi 19-02-2013 32 3   Download

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