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Experimental investigation on gasification characteristic of high lignin biomass (Pongamia shells) |
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| Affiliation: | 1. Department of Mechanical Engineering, G.B.Pant Engineering College, Ghurdauri, Pauri Garhwal, Uttarakhand 246194, India;2. Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India;3. Department of Mechanical Engineering, ITM University, Gurgaon, Haryana 122017, India;1. University of Agder, Faculty of Engineering and Science, Serviceboks 509, 4898 Grimstad, Norway;2. Universidad Zaragoza, Thermochemical Processes Group (GPT), Aragon Institute of Engineering Research (I3A), I+D+i building, C/Mariano Esquillor s/n, E-50018 Zaragoza, Spain;1. Department of Mechanical Engineering, ADIT, V.V. Nagar, India;2. Sardar Patel Renewable Energy Research Institute (SPRERI), Vallabh Vidhyanagar, Mota Bazaar, Vallabh Vidhyanagar, Anand, Gujarat-388120, India;1. State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Tianjin 300072, China;2. Guangxi Yuchai Machinery Co., Ltd, 88 Tianqiaoxi Road, Yulin 537000, China;1. School of Mechanical Engineering, The University of Adelaide, S.A, 5005, Australia;2. School of Chemical Engineering, The University of Adelaide, S.A, 5005, Australia;3. Humanitarian and Development Solutions Initiative, The University of Adelaide, South Australia, 5005, Australia |
| Abstract: | Pongamia residue (shells) is the byproduct from the biodiesel processing industry, which is a lignocellulosic biomass material. It is not suitable as feedstock in downdraft wood gasifier due to low bulk density (146 kg/m3) of shells as compared to wood (more than 350 kg/m3). Pelletization and gasification of pelletized shells was carried out in the present work. The heat transfer analysis in pellets of 17 mm and 11.5 mm was also carried out to evaluate thermal properties of this biomass. Shell pellets of 17 mm and 11.5 mm diameter and length in the range of 10–60 mm were gasified in a 20 kWe downdraft wood gasifier. The complete gasification of pellets with 17 mm diameter could not be achieved because of less porosity and presence of larger thermal gradient within the pellets. The gasification efficiency was 73% for 17 mm diameter pellets which is lower than that of 11.5 mm diameter pellets which was 95%. The calorific value of producer gas generated from smaller diameter pellets was higher (4.66 MJ/N m3) as compared to larger diameter pellets (3.98 MJ/N m3). Tar formation during gasification of smaller diameter pellets was low as compared to larger diameter pellets. |
| Keywords: | Biomass Pongamia shells Downdraft gasifier Gasification Producer gas |
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