Carbon Black Produced by the Pyrolysis of Coal.
Johnson-GE; Decker-WA; Forney-AJ; Field-JH
I&ec Prod Res & Development 1970 Sep; 9(3):382-387
Carbon black equivalent to commercial grade has been produced by the pyrolysis of coal at 1,250 deg to 1,350 deg c at the Bureau of Mines, Pittsburgh, Pennsylvania. The maximum yield of black obtained from Pittsburgh seam coal (HVAB rank) is about 20 percent by weight based on the raw coal fed. The work has been done on a bench-scale electrically heated unit with a maximum coal feed rate (70 percent-- 200 mesh) of 3 pounds per hour. Byproducts are a coal char which could be burned for power generation and byproduct gas (8 to 9 cubic feet per pound of coal) containing 80 percent hydrogen. The carbon black product has been evaluated in chemical and rubber compounding tests by industrial companies and found to be equivalent in quality to fine thermal (ft) grade of commercial blacks. A patent has been granted to the U.S. Government. Cost studies indicate that the carbon black could economically be produced from coal.
I&ec Prod. Res. & Development, V. 9, No. 3 , September 1970, PP. 382- 387