Control of different pyrite forms on desulfurization of coal with bacteria

Singh, Prakash; Singh, Asha; Kumar, Aniruddha; Singh, Mahendra

doi:10.1016/j.fuel.2012.11.002

Cited by 43 publications

(26 citation statements)

References 19 publications

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“…Several colonies were seen to develop on solid agar plates in 24 hours. The individual colonies were screened and tested following the method given by Singh et al (2013). The isolated bacterial colonies were grown in a growth medium and the growth of the colonies was measured individually at 660 nm with the help of spectrophotometer.…”

Section: Isolation Of Bacteria and Mass Cultivationmentioning

confidence: 99%

Experimental Study on Demineralization of Coal with Pseudomonas Mendocina Strain B6–1 Bacteria to Obtain Clean Fuel

Singh

Kumar

et al. 2014

Energy Exploration & Exploitation

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We present the results of the investigations carried out on the demineralization of coal of the Rajmahal Gondwana basin of India using Pseudomonas mendocina strain B6-1. Petrographically these coals are characterized by high concentration of inertinite macerals with subordinate amount of vitrinite and liptinite macerals. The mineral matter content occurs in high concentration which gives a high ash yield. This coal contains relatively high content of major, minor and trace elements when compared with the Clarke values in coal.After the bacterial treatment a considerable reduction in the elemental content of oxygen, hydrogen and sulphur was seen. Reduction in the ash content (>5%) was achieved and variable degrees of removal of the various major, minor and trace element concentration was also noticed. Nearly 59% removal of Mn, 53% of Na, 13% of Fe was achieved among the major/minor elements while nearly 54% of As, 41% of Cd, 39% of Cu, 34% of Ni, 32% of Zn, 13% of Cr, 43% of Co and 66% of Pb could be removed. Arsenic, Fe and Ca have a strong positive correlation with the ash removal percentage indicating that the samples having increased concentration of these elements are prone to demineralization with Pseudomonas mendocina strain B6-1. Whereas the elements like Ni, Zn, Cr and Cu maintain a strong negative correlation with the ash removal percentage indicating that their enrichment could have hampered the process of demineralization.

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Section: Isolation Of Bacteria and Mass Cultivationmentioning

confidence: 99%

Experimental Study on Demineralization of Coal with Pseudomonas Mendocina Strain B6–1 Bacteria to Obtain Clean Fuel

Singh

Kumar

et al. 2014

Energy Exploration & Exploitation

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“…Sulphur removal from coal has become a subject of extensive research and it is being given more impetus during last one decade (Singh and Singh 2010;Singh et al 2012Singh et al , 2013Singh et al , 2018Kumar et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Desulphurization of dibenzothiophene by different bacteria: A case study on model compound

Kumar¹,

Singh²,

Singh³

2020

Preprint

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Bacterial strains are successfully employed to desulfurize dibenzothiophene which may be determined by chromatography, HPLC and GC-Mass spectrometry. Strains of Ralstonia sp ., Pseudoxanthomons sp. and Rhodococcus sp. were used in the present investigation. Only Rhodococcus sp. was able to convert dibenzothiophene (DBT) into 2-hydroxy biphenyl (2-HBP). Gibb’s assay blue colour indicates the conversion of DBT into 2-HBP and brown colour indicates complete consumption of DBT by bacteria. After two days of bacterial treatment, there was no further removal of DBT. Conversion of DBT into 2-HBP was monitored through HPLC for six days of entire experiment.

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“…Research on desulphurization of pre-combustion coal has been carried out by many researchers (Ambedkar et al, 2011;Park and Kim, 2006;Tian et al, 2016;Wang et al, 2017). Some of the literature survey in which sulphur is removed by chemical treatment (Abdollahy et al, 2006;Longjun et al, 2012;Singh et al, 2013), bio-desulphurization (Cara et al, 2005;Gonsalvesh et al, 2013), oil agglomeration (Sahinoglu and Uslu, 2015), flotation (Abdollahy et al, 2006;Saydut et al, 2008) and ultrasonic treatment (Saikia et al, 2014a(Saikia et al, , 2014c. All processes include inherent advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Effect of some operational parameters on desulphurization of high sulphur Indian coal by KOH leaching

Ken

Nandi

2018

Energy Exploration & Exploitation

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This paper presents an experimental study on the effect of potassium hydroxide concentration and reaction time on coal properties during desulphurization of high sulphur Indian coal. Experimental results showed that maximum of 36.79% of total sulphur can be removed from coal by potassium hydroxide leaching with 20% potassium hydroxide concentration and 24 h contact time at atmospheric condition. Total sulphur reduction was contributed by 45.03-49.01% pyritic sulphur, 24.10-33.73% sulphate sulphur and 20.93-30.62% organic sulphur depending on potassium hydroxide concentration of 5-20% and reaction time of 6-24 h. Experimental result shows that ash% of coal increased from 8.33 to 14.09% due to accumulation of insoluble potassium aluminosilicate in the coal. Gross calorific value of coal decreased from 6854 to 6084 kcal/kg due to increase of ash content of coal and loss of some combustible matter in leaching process. Physico-chemical characterizations of raw and treated coal samples were carried out by using field emission scanning electron microscope, Fourier transform infrared, petrographic analysis, thermogravimetric analysis and differential thermogravimetry to appraise the product quality. Field emission scanning electron microscope and coal petrographic image infer the occurrence of pitting and cavitation in the coal structure due to removal of pyrite sulphur (1.51-1.21%) from coal which causes escalation of vitrinite (67.65-70.43%) and few amounts of inertinite (18.03-18.86%) and liptinite (1.24-1.27%) as macerals. Thermogravimetric analysis-differential thermogravimetry analysis infers the improvement in combustion characteristics of treated coal by reduction in peak combustion temperature.

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Control of different pyrite forms on desulfurization of coal with bacteria

Cited by 43 publications

References 19 publications

Experimental Study on Demineralization of Coal with Pseudomonas Mendocina Strain B6–1 Bacteria to Obtain Clean Fuel

Experimental Study on Demineralization of Coal with Pseudomonas Mendocina Strain B6–1 Bacteria to Obtain Clean Fuel

Desulphurization of dibenzothiophene by different bacteria: A case study on model compound

Effect of some operational parameters on desulphurization of high sulphur Indian coal by KOH leaching

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