MIT School of Engineering | » What is "clean" coal?
By Deborah Halber. "Clean" coal does not mean running the black sooty stuff through the washer. The phrase refers to technologies that mitigate or avoid pollutants or CO2 emissions generated by converting coal to electric energy, says János M. Beér, professor emeritus of chemical and fuel engineering. Low-cost, easily transportable and ...
4 Coal Mining and Processing | Coal: Research and ...
The U.S. coal industry serves a vital role in the nation's economy by producing fuel for more than half of its electricity. Despite the industry's importance, industry financial data for 2005—the strongest year for the coal industry in recent years—shows that it is a relatively small industry with revenues totaling $20 billion to $25 billion and net income between $1 billion and $2 ...
Characterization, analysis and simulation of fine coal ...
Fine coal filtration and dewatering are of great importance to the coal industry due to the significant impact in the quality, shipping, and handling of clean coal. High moisture content in the clean coal product reduces its heating value, increases costs, and reduces the coke yield in the case of metallurgical coal. In this regard, it is of significant importance to improve our fundamental ...
LICADO process for super-clean coal. Phase I. Final report ...
The LICADO LIquid CArbon DiOxide process is currently being investigated as a new technique for cleaning coal. It relies on the relative wettability of clean coal and mineral particles between liquid CO/sub 2/ and water so that when liquid CO/sub 2/ is dispersed into a coal-water slurry, it tends to form agglomerates with the clean coal particles and float them to the liquid CO/sub 2/ phase.
IEEFA U.S.: Southern Company demolishes part of the $7.5 ...
However, the coal gasification system, called TRIG™, had only been tested on a small-scale facility which processed an average of less than two tons of coal per hour and remained unproven in a commercial-scale power plant like Kemper (which was designed to process 575 tons per hour in each of its two gasifiers).In addition, significant problems were experienced during the scaling up of …
Coal Washing | Encyclopedia.com
Coal washing Coal that comes from a mine is a complex mixture of materials with a large variety of physical properties. In addition to the coal itself, pieces of rock, sand, and various minerals are contained in the mixture. Thus, before coal can be sold to consumers, it must be cleaned. The cleaning process consists of a number of steps that results in a product that is specifically suited to ...
Turning Dirty Coal into Clean Energy : NPR
In their process, coal is mixed with a catalyst and fed into a gasifier: a tall, narrow, metal cylindrical container. Inside the gasifier, the coal and the catalyst are combined with steam and ...
New Approach Study on Dry Coal Cleaning System with Two ...
In this study, the first stage of beneficiation recovered 38.00% (by weight) of clean coal (ash content below 20%), and the second stage recovered 48.58% (by weight) of clean coal, improving the overall separation efficiency from 0.69 to 1.74. Furthermore, the sulfur content was reduced from 4.71% (raw coal) to 3.53% (clean coal).
Sandia applies for patent to clean coal ash, mine rare ...
The process leads to cleaner coal, either before combustion or after, Xu said. He said similar methods that exist today to extract the elements from coal ash use industrial solvents that become hazardous waste, as opposed to their method that uses an environmentally benign acid found in limes.
Clean Coal Gasification, FT Process Design and Implementation
Clean Coal Gasification, FT Process Design and Implementation Clean Coal for Transportation Fuels Workshop Purdue University December 2, 2005 Michael E. Reed, Systems Analyst, Office of Systems, Analyses, and Planning National Energy Technology Laboratory Office of Fossil Energy
Clean Coal: Pros and Cons - TriplePundit
Clean coal has a number of variations, but all of them involve stripping the CO2 out of the coal, either before or after it is burned and then capturing it. ... The overall process is called ...
There's no such thing as clean coal - PopSci
Natural gas killed the coal power plant, and renewable energy has the potential to power the world without destroying it in the process. Coal is over. Coal is over. The only question we should be ...
DOE Announces 1st Projects to Meet President's Clean Coal ...
The climate change benefit comes from the potential of the new process to reduce the manufacture of portland cement, one of the highest generators of carbon dioxide, a greenhouse gas, of any industrial process. The Energy Department will provide $4 million of the project's $9 million cost. Clean Energy from Coal Waste Piles
Appendix E: Coal Mining and Processing Methods | Coal ...
The first washing methods were imported from Europe, The "Chance" washer, in which the density differences between coal and mineral matter was exploited to clean raw coal was introduced in 1918. The Chance washer utilized sand and water as a medium. Today, the "heavy-media" process using magnetite is standard for coarse coal cleaning.
Status of DOE's Clean Coal Program | Department of Energy
The Clean Coal Research Program – administered by DOE's Office of Fossil Energy and implemented by the National Energy Technology Laboratory (NETL) – is designed to enhance our energy security and reduce environmental concerns over the future use of coal by developing a portfolio of cutting-edge clean coal technologies.