coal selection criteria for industrial pfbc firing project 3.2 - CCSD
coal selection criteria for industrial pfbc firing project 3.2 - CCSD
coal selection criteria for industrial pfbc firing project 3.2 - CCSD
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“Coal Selection Criteria <strong>for</strong> Industrial PFBC Firing”<br />
fusion temperature advantage of Australian <strong>coal</strong>s (Stubington, Wang et al. 1998). The use<br />
of dolomite sorbent instead of limestone could also raise the melting point of alkali<br />
eutectics in the filter cake (Stubington 1997). Another solution was to use <strong>coal</strong> ash<br />
instead of limestone <strong>for</strong> maintaining bed height. High ash <strong>coal</strong>s were found to build bed<br />
height faster (Sudhakar Gupta, Mandal et al. 1995). This method was not very effective<br />
in capturing sulfur, however this should not be a major problem as Australian <strong>coal</strong>s<br />
produce low level of sulfur emissions (Peeler, Lane et al. 1990). Alternative methods to<br />
maintain bed height, such as zero-stage cyclone or <strong>selection</strong> of <strong>coal</strong> with appropriate ash<br />
particle size distribution, have been investigated. They should be encouraged to maintain<br />
the advantage of Australian <strong>coal</strong>s.<br />
Experiments with two Australian <strong>coal</strong>s were conducted at Wakamatsu. Ashes from one<br />
caused high stationary pressure drop in the ceramic tube filter (Iwamoto, Ishom et al.<br />
2001). This <strong>coal</strong> was found to produce very fine ash (
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