抄録
Using a new 100kW plasma gasifier with three torches, coal gasification was studied. The highest acetylene yield attained so far was 59g/kWh. At the same time, a considerable amount of plasma carbon black was obtained as byproduct.
Fundamental data were collected to find the applications of the plasma carbon black. Heating loss, iodine adsorption number, DBP absorption number, ash content, etc. were examined in accordance with JIS (K 6221). Inorganic substance, sulfur, adsorbed oil, and volatile material in the carbon black were analyzed. Also, the separation of the plasma carbon black was tried.
One of the peculiarities of the carbon black was that the volatile content was more than 15% including adsorbed oil. Another was its relatively high ash content even in the case of the separated carbon black. It was estimated that a considerable amount of the organic sulfur in coal was converted into inorganic sulfur, and resided in the inner part of deposited carbon black in the form of metal sulfide. In order to find commercial applications of the plasma carbon black, it will be necessary to develop a dry separation process and a practical distillation process.
