A5033368923- Coal and Its By-products
- Thermochemical Biomass Conversion Processes
- Coal Properties and Utilization
- Metal Extraction and Bioleaching
- Coal and Coke Industries Research
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Heavy metals in environment
- Mineral Processing and Grinding
- Hydrocarbon exploration and reservoir analysis
- Mine drainage and remediation techniques
- Air Quality Monitoring and Forecasting
- Recycling and utilization of industrial and municipal waste in materials production
- Vehicle emissions and performance
- Chemical Reactions and Isotopes
- Coal Combustion and Slurry Processing
- Catalysis and Hydrodesulfurization Studies
- Thermal and Kinetic Analysis
- Geochemistry and Geologic Mapping
- Asymmetric Hydrogenation and Catalysis
- Chemical Synthesis and Reactions
- Mercury impact and mitigation studies
- Industrial Gas Emission Control
- Carbon Nanotubes in Composites
- Fire dynamics and safety research
North Eastern Hill University
2024
North East Institute of Science and Technology
2010-2021
Institute of Science and Technology
2014-2015
North China Institute of Science and Technology
2012
Council of Scientific and Industrial Research
2010-2011
Advanced Materials and Processes Research Institute
1991-2007
Institute of Minerals and Materials Technology
1991-2007
The north eastern region (NER) of India has a substantial deposit high sulfur (2−8%) coals with low ash and volatile matter contents. Assam, one the coal producing states region, deposits 75−90% organic functionalities affixed to structure difficult remove. present investigation reports desulfurization oxidized Assam by solvent extraction alkali treatment separately. two samples are selected represent categories: (Baragolai) other (Ledo) routes comprised oxidation various size fractions in...
Aqueous leaching of high sulfur sub-bituminous coals from Ledo and Baragolai collieries Makum coal fields, in Assam, India, has been investigated with respect to time at different temperatures. Leaching 25 °C up 120 h showed that the physicochemical characteristics viz., conductivity, acidity, TDS, SO4-2 ions, increase leaching. The generation highly acidic leachates 1−1.5 (pH 2.5) 2 3.1) for was observed, respectively. However, it remains stable h. concentration major, minor, trace elements...
Pyrolysis experiments under laboratory conditions for five numbers of high sulfur coal samples from the states Meghalaya and Nagaland, India, were carried out at temperatures 450, 600, 850, 1000 °C, respectively. The yield products thermal release these coals are investigated. distribution in pyrolyzed products, i.e., char/coke, gas, tar, is also reported. Hydrocarbon sulfurous gases released different analyzed by a gas chromatograph (GC) with an FID (flame ionized detector) FPD photometric...
Polyaniline-fly ash (PANI-FA) composites were prepared by oxidative polymerization of aniline with fly in presence ammonium persulphate (APS). The PANI-FA different concentrations to ratio. composites, so prepared, characterized UV-vis spectroscopy, Fourier transform infrared (FTIR) scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). thermal stability was studied TGA total weight loss PANI, FA having composition 0.02%, 0.1%, 0.5% 1.0% found be 82%, 39.%, 67% 65%, 62%...
Two classes of amine fly ash based composites (FAA13 and FAA23) are prepared evaluated as CO2 adsorbents. FAA13 is from primary tertiary amines (MEA/DMA) while FAA23 (DEA/DMA) secondary amines. Composites were characterized by elemental analyses such Scanning electron microscope (SEM-EDX), UV–Visible, Fourier Transform Infra Red (FT-IR), carbon, hydrogen, nitrogen (CHN) Thermo-gravimetric Analysis (TGA). A temperature-programmed degradation study shows a much higher stability in comparison...
PM2.5 and PM10 samples collected at a suburban site of northeastern part India have been analysed for particle mass, total carbon (TC), water-soluble (WSTC), organic (WSOC), inorganic (WSIC), acids (formic, acetic, proponoic oxalic acids) along with ions (NO3 −, SO4 2− NH4 −). Most the consists in present (ratio 54–74%). WSTC content corresponds to 21% 16%, respectively, their masses. Thermo gravimetric analysis showed presence humic-like substances (16–22%) particulate samples. Domestic...
Higher hydrogen content of perhydrous coals exhibits a different composition and physicochemical properties in comparison with normal coals. In the present investigation, structural study coke was done using FTIR HPLC data. These have high volatile matter high-calorific values low-moisture content. The suggests that major units these are simple phenols para-alkyl substituted derivatives. They alkyl substitution groups low aromatic compounds. studies reveal contain amounts low-molecular...