http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/12 SIPET Tue, 16 Jun 2026 09:15:39 GMT 2026-06-16T09:15:39Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30985 Title: Feasibility and Performance Characterisation of a Dual-Fuel Engine Automobile Using Premium Motor Spirit (PMS) and Compressed Natural Gas (CNG). Authors: Abdulrahman, L. T.; Okoro, U. G.; Alim, S.; Baba, A. M.; Opatola, R. A. Abstract: The increasing environmental and energy challenges associated with Premium Motor Spirit (PMS) in spark-ignition engines necessitate the exploration of alternative and cleaner fuels. This study investigates the feasibility and performance of PMS–Compressed Natural Gas (CNG) dual-fuel operation using a validated Computational Fluid Dynamics (CFD) framework in ANSYS Fluent. A high-fidelity 30° sector model of a single-cylinder engine was developed, incorporating PMS direct injection and CNG port injection, with simulations conducted across substitution ratios of 0–40%. Mesh independence and time-step sensitivity analyses were performed to ensure numerical reliability, and validation against experimental benchmarks confirmed deviations within ±5%. Results show that moderate substitution (20–30% CNG) achieves the most effective balance, maintaining brake thermal efficiency at ~38.8% and limiting power losses to less than 6%, while reducing CO₂ and NOₓ emissions by 22% and 26%, respectively. These findings demonstrate the potential of PMS–CNG dual-fuel technology as a cost-effective transition pathway toward sustainable transport, particularly in regions such as Nigeria where natural gas infrastructure is expanding. The study also provides systematic CFD-based optimization and detailed insights into in-cylinder flow dynamics, offering a valuable complement to experimental research. Wed, 01 Jan 2025 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30985 2025-01-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29546 Title: Physico-Chemical Analysis of Bio-Oil produce From Co-Pyrolysis of Sida Rhombifolia with Low- and High-Density Polyethylene. Authors: Abdullahi., A.; Garba, M. U.; Eterigho, E. J.; Alhassan, M.; Adeniyi, O. D. Sat, 01 Jan 2022 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29546 2022-01-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29515 Title: Physico-Chemical Analysis of Bio-Oil produce From Co-Pyrolysis of Sida Rhombifolia with Low- and High-Density Polyethylene. Authors: Abdullahi., A.; Garba, M. U.; Eterigho, E. J.; Alhassan, M.; Adeniyi, O. D. Abstract: SR, LDPE, HDPE, Nio-oil, pyrolysis, co-pyrolysis Sat, 01 Jan 2022 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29515 2022-01-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29480 Title: Municipal Solid Waste Conversion to Energy and Derived Chemicals using Hydrolysis Authors: Abdul-Qdri, M; Olutoye, M. A; Agbajelola, D. O.; Adeniyi, O. D.; Eterigho, E. J.; Isah, A. Abstract: This research work evolved through the variables such as time and temperature to determine the highest bio-oil yields. Conventional pyrolysis was adopted in a drop type CVD pyrolyzer given the highest oil yields 32.50 %wt, at 500 0C for 30 min. The bio-oil properties (CHNS-O) at various temperatures were evaluated. Carbon, hydrogen, Nitrogen, sulphur and calorific values were observed to increase as the temperatures increases, having highest values at 500 0C with a sudden decline at 550 0C. While oxygen, water contents, densities and pH values decrease as the temperature increases, with lowest values recorded at 500 0C and sharp increase at 550 0C. Hence, the degree of de-oxygenation also increases as the temperature increases with 18.87 %wt. at 500 0C and decreased at 550 0C. The results of FTIR analysis of the bio-oils at 500 0C indicate functional groups such as alkyl/Aromatic substitute ether (C-O), Aromatic 10 amine (C-N), Phenol/30 Alkanol (O-H), alkenes (C=C), Nitriles (C-N) and amines (N-H) with their areas. Sun, 01 Jan 2017 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29480 2017-01-01T00:00:00Z