Electrical Properties of Coal-Peats Found in Faridpur and Khulna Districts of Bangladesh

Abstract

Fuel and electrical characteristics of coal-peats found in Faridpur and Khulna districts-of Bangladesh have been studied. The suitability of the coal-peats for use as fuel and for other technical purposes has been assessed on the basis of its fuel value along with its proximate analyses and electrical response of the samples .The results indicate that the peat is technically feasible for domestic and industrial uses. The electrical study involving the change of resistivity with temperature ascertains that the peat available in this region like other peats in the world have the semi-conducting properties. The high insulating character in the temperature region (239.82- 279.41i)oC has been found,~Chanda Beel peats and in the temperature regions (191.04 -346.2)oC; (29.3.57- 318.72)oC for two samples of Baghia Beel peats respectively and (247.83 -346.20)oc for KOla Mouza peats, that is, the resistivity increases with increasing temperature in each case. Above the ranges of tempe~ature, i.e. for temperature range ( 438.75 - 624) °c of Chanda Beel peatE' (399.75 -536.72)oc (402.1€l-570.c[O)OC of Baghia Beelpeats and ( 36G - 550)oc of r:ola !louza peat, the hydrocarbons and other oxides of different materials are found to decompose and the molecules of parent materials are structurally ordered. Here a liquid mesophase is formed in each case of and hence a sharp fall of resistivity is observed. This sharp fall of resis tivity ascertail1.?the semiconducting characters of the samples. It has also been found that peat under 'investigation are structurally different in different areas as indicated by resistivity vs inverse of temperature curves.