| Author: | Bhatnagar, Anushree; Dastidar, Manisha G; Roychoudhury, Pradip K |
| Advisor: | Advisor |
| Date: | 1998
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| Publisher: | |
| Citation: | Energy con
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| Series/Report no.: |
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| Item Type: | Article
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| Keywords: | Coal; Bacterial preconditioning; Oil agglomeration; Pyritic sulphur rejection; Vegetable oils |
| Abstract: | Microbial desulphurization of coal using a pyrite oxidizing organism such as thiobacllus fer rooxidans result in approximately 90% pytiric sulphur reduction in 30d. An integrated technique comprised in bacterial preconditioning and subsequent oil agglomeration is concered with surface modification of the pyrite with short contacts (2 240 min)with a culture of thiobacillus ferooxidence and its rejection during agglomeration coal(250m)was preconditiond with the bacterial culture for 2.5-30min before subjecting it to oil agglomeration.About 75-80%ash rejection and 90-97% pytric sulphur reduction(PSRD)have been obtained.Extending preconditioned for 240min could not improve the (PSRD)BRYOND 97%.By increasing practical size from-240m to-800+400m the pytric sulphur reduction(PSRD)decreased from 97-71%whereas prolonging the preconditioned period to 240min enhanced the (PSRD)to90%.The integrated technique has considerably reduce the time requirment from 20-30d to 20-240min in order to obtained to 90%pyritic sulphur reduction.Caster oil has been used as the agglomerant and found to be a used subsitute to traditionally used petroleum fractions. |
