Faculty Publications
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Item Exploring the synergetic effects of rice husk, cashew shell, and cashew husk biomass blends on fluidized bed gasification for enhanced hydrogen production(Elsevier Ltd, 2023) Manu, J.; Kailas, T.G.; Madav, V.The present study, explored the gasification performance of commonly available biomass like rice husk, cashew shell, and cashew husk and their blend for better gasification performance using a 3 kW fluidized bed gasifier in the ER ranging from 0.2 to 0.35 and temperature of 750 °C. The catalytic effect of biomass blends are identified by using FTIR, XRF, proximate and ultimate analysis. The performance of a fluidized bed gasifier is assessed in terms of its producer gas composition, LHV, CCE, CGE and gas yield. The blending of biomass resulted in the enhancement of producer gas quality due to the synergetic effect. At ER of 0.2, maximum hydrogen of 8.1% and LHV of 4.3 MJ/m3 is obtained, and at ER of 0.35, maximum CGE and CCE of 54.9 and 91% respectively are obtained for RH + CS blend. XRF analysis shows that mineral oxide improves the composition of producer gas, and FTIR analysis indicates a decrease in functional groups in the ash of blended biomass compared to individual biomass. © 2023 Elsevier LtdItem Novel adsorption-based upgradation of end-of-life polypropylene pyrolysis oil using carbonised rice husk(Elsevier Ltd, 2025) Kailas, T.G.; A R, A.; Dutta, S.; Madav, V.Plastic waste management is a global issue, with end-of-life polypropylene (EoL PP) having significant contribution. Polypropylene degradation forms undesirable compounds in pyrolysis oil, reducing its quality and limiting its fuel usability. Pyrolysis offers a promising solution for converting plastic waste into valuable fuels; however, the presence of degraded materials necessitates an effective upgrading process to enhance the fuel quality. This study introduces an innovative ex-situ adsorption-based upgradation technique using carbonised rice husk (CRH), an abundantly available, sustainable and cost-effective biomass residue, to significantly improve the quality of pyrolysis oil derived from EoL PP. The upgradation process reduced sulphur content in polypropylene pyrolysis oil from 0.19 % to 0.02 %. The cetane index, a key fuel quality metric, rose from 43.83 to 55.25, enhancing combustion properties. Proton nuclear magnetic resonance showed an increase in paraffin content from 53.15 vol% to 60.81 vol%, improving energy content and combustion efficiency. Olefins and aromatics decreased, improving fuel stability and reducing emissions. GCxGC TOF-MS analysis revealed a decrease in oxygenates and an increase in diesel-range hydrocarbons, improving fuel quality and stability. This comprehensive study highlights the dual benefits of CRH in enhancing fuel quality and supporting circular economy practices, making a significant contribution to the development of sustainable fuel alternatives in the waste-to-energy conversion sector. © 2024