Coal Products
Development of Coal Hydrogasification Technology
K Nomura, F Norguchi, K Katsukura The Japanese Gas Association;
H Maruyama and T Ohoma NEDO, Japan
Coal Hydrogasification for producing substitute natural gas (SNG) is
a promising technology in Japan to secure a stable supply of natural gas
by diversifying its sources. Under agreement with NEDO, the Japan
Gas Association has completed a 5-year program in which three elemental
gasifier technologies and two peripheral technologies were developed using
experimental apparatus.
In gasification tests, a wide range of carbon conversion was verified
under various conditions including two-stage reaction. A new injector,
which incorporates a tip burner to generate high temperature hydrogen,
was developed through the hot model test. The optimal internal configuration
was developed to generate adequate recycle of product gas and form the
two-stage reaction zone through the cold model test. Dense phase
coal conveying was verified using hydrogen under high pressure between
3 and 7 MPa, and various factors for stable discharge and cooling of char,
which is residue from the hyrogasifier, was confirmed using a model particle.
Low Severity Extraction of Pitch from Coal as a Precursor to Value
Added Products – Revisited
A Berkovich and C Lafferty University of Kentucky, Lexington
USA
This paper reports on the production of pitch feedstocks for value
added carbon materials via mild solvent extraction of coal. Crude
anthracene oil, an inexpensive coal tar distillate was shown to extract
a reasonable yield of pitch from coal under mild temperatures with no over
pressure. The effect of extraction temperature, residence times and
coal to solvent ratios was investigated for a suite of coals differing
in rank and sulfur content. The extraction capability of recycled
anthracene oils recovered from prior extractions was also examined.
Carbon fibers were fabricated from the derived pitches and their physical
properties assessed.
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