high-rank coal

high-rank coal

[′hī ‚raŋk ′kōl]
(geology)
Coal consisting of less than 4% moisture when air-dried, or more than 84% carbon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Wang et al., "FIB-SEM and X-ray CT characterization of interconnected pores in high-rank coal formed from regional metamorphism," Journal of Petroleum Science and Engineering, vol.
High-rank coal reservoir is characterized by high degree of metamorphism, strong anisotropism, matrix density, high adsorption capacity of coalbed, and poor permeability [4]; these characteristics result in the low gas extraction efficiency of CBM in high-rank coal reservoirs.
According to the literature review [20], the surface relaxation rate of high-rank coal core is [[rho].sub.2] = 5.4 [micro]m/s.
Experimental research on the permeability of high-rank coal under a varying stress and its influencing factors.
announces that it will start a large-scale demonstration project in Indonesia to upgrade brown coal into high-rank coal, which can be used for power generation.
At the same time, it solves the problem of shipping and storage limitations, making possible the utilization of upgraded coal as a substitute for high-rank coal. UBC has the potential of becoming a clean, outstanding source of energy.
It has been suggested that higher rank coals with a higher electrostatic charge on breakage may contribute to the increased incidence of CWP in the high-rank coal regions (Page and Organiscak 2000).
The site near Sutton has proven recoverable reserves of high-rank coal totaling 15 million tons.
Low-rank coals have great importance in utilization but have some problems due to low efficiency and higher C[O.sub.2] emissions compared to high-rank coals. These coals are difficult for storage and transportation and are not suitable for direct combustion [1-5].
High-rank coals demonstrate a small change in the surface area of macropores in relation to changes in the values of spontaneous combustion indexes.
Whaling ships in the late 1800s and the early 1990s used coal mined from the Corwin Bluffs and Cape Beaufort areas along the coast of the Chukchi Sea, according to the State-produced Alaska's High-Rank Coals publication.