Abstract
In order to estimate the possibility of converting extractive chemical disintegration residues of coals under hydrogen pressure to activated carbons, we investigated the influence of reaction temperatures (350-450°C), reaction times (0-720min.) and differance of various kinds of coals on the surface area of extraction residues, the reactivity of extraction residues with steam, and then the surface area of the reaction residues with steam at the temperature range of 600-900°C.
The results showed that
(a) Extractive chemical disintegration residuesof the lower rank coals had the higher reactivity and the larger surface area.
(b) The surface area of extraction residues produced at the lower temperatures was larger. At the reaction temperature above 375°C that the disintegration reaction occurred vigorously, it showed a tendency of the incdease at the initial reaction stage and then the decrease, but at 350°C it increases firstly and then keepes constant value during reaction time.
(c) Extraction residues which had the larger surface area gave the products with larger surface area.
(d) The bitumious coals treated by the extractive chemical disintegration were also converted to the products with large surface area.
