Demineralization Study of High-Ash Permian Coal with Pseudomonas mendocina strain B6-1: A Case Study of the South Karanpura Coalfield, Jharkhand, India

Abstract

This paper entails the results of demineralization carried out on Karanpura Gondwana coals having high ash (30.57–21.80%) and low sulfur (0.29–0.20%) contents. The coal samples were subjected to demineralization using Pseudomonas mendocina strain B6-1, and the effect of various parameters, such as pH, temperature, incubation time, and pulp density, was observed. Optimum values of demineralization were found at pH 6.0, temperature of 35 °C, 6.0% (w/v) pulp density, and incubation time of 7 days. Reduction in the mineral matter (mean of 13.72–29.10%) content led to a relative increase in vitrinite, inertinite, and liptinite macerals. Further, the treatment has also caused an increase in the useful heat value, gross calorific value, and net calorific value of coal from 4824.86 to 5192.06 cal/g, from 5396.72 to 5647.47 cal/g, and from 5059.30 to 5273.80 cal/g (mean values), respectively. The method is eco-friendly and useful in obtaining clean fuel.

Effect of Fe3O4 coated bacterial consortium IQMJ-5 on the desulfurization of the organosulfur portion of Pakistani coal and its chemical characteristics

“…As a result of the biotreatment of coal with the consortium IQMJ-5, not only the organic sulfur fraction of coal was reduced but also many of the unwanted or noxious metals present in the coal samples were also altered positively. The results obtained in the present research work are greatly in accordance with that of the studies conducted previously (Acharya et al, 2004;Kumar et al, 2018Kumar et al, , 2019Yang et al, 2016). The ultimate analysis was conducted to nd out the percentage by weight of different elements such as carbon, oxygen, hydrogen, sulfur, and nitrogen in coal samples.…”

“…Biodesulfurization (BDS) is a relatively novel technology operating at ambient environmental conditions along with the minimum release of unwanted by-products. Therefore, BDS is regarded as a promising technology for lowering the amount of sulfur in coal along with a minimum impact on the quality of the environment (Kumar et al, 2018).…”

Cyclic Sedimentation in the Barakar Formation of the Karanpura Field, Marginal Gondwana Basin, India

“…reported average 1-20m thickness of coal seams within Barakar Formation from the sub-surface geophysical log studies. The occurrence of Glossopteris, Gangamopteris and Cyclopteroids fossil leaves were also observed in their usual state of preservation from the carbonaceous shale and clay band of Barakar Formation (Srivastava and Agnihotri, 2013;Tewari et al, 2017;Kumar et al, 2018). The studies from various coal mines and surface exposures interpret that Barakar coals were deposited in protected peat swamps and confined lakes in a meandering river environment.…”

An effective method to remove organic sulfur in coal: Effects on the physicochemical properties and combustion kinetics

“…As is seen from this table, the moisture and ash content of coal samples decrease after desulfurization. Ash is mainly composed of some inorganic minerals, so the results indicate that some inorganic minerals in the coal have been dissolved after microorganism treatment 12,16,17 . According to the ultimate analysis results, after microbial desulfurization, there were no obvious changes in carbon, hydrogen, and nitrogen contents due to the stability of the coal structure.…”

“…Ash is mainly composed of some inorganic minerals, so the results indicate that some inorganic minerals in the coal have been dissolved after microorganism treatment. 12,16,17 According to the ultimate analysis results, after microbial shown in Table 6. The organic sulfur with N. mangyaensis reduced from 2.03% to 0.78% and decreased to 0.93% with P. putida.…”