The nanoparticles diesel additives played a major role in enhancing diesel performance by improve its efficiency and alter the emissions of CO, NOx and HC including several hazardous air pollutions. Zinc oxide nanoparticles (ZONP) is used in diesel engines which blended with diesel by using ultra sonicator and a mechanical homogenizer to achieve good dispersing. Five concentration of ZONP are studied in this study. To demonstrate and access the enhanced performance of the nano-diesel blend a comparison of fuel consumption, brake power and engine efficiency with base diesel are made. The addition of ZONP promote combustion by increasing engine performance and reducing the emissions. To evaluate the impact of ZONP on engine performance and environment, several experiments performed on the diesel engine at 1400 rpm which is kept constant throughout the experiment with different range of loads. The results show clearly that by adding the nanoparticles, namely ZONP into the diesel fuel has significant improvement of high the brake thermal efficiency (BTE) and low Brake Specific Fuel Consumption (BSFC) as compared to diesel. Also, the average reduction in CO is 33% for high ZONP concentrations and applied high loads while average increases in CO2 is 8%, and NOx is 33% and more for high ZONP concentrations and applied high loads compared to pure diesel. Furthermore, 100% eliminated HC is observed when compared to pure diesel at different loads.

Gas flaring is one of the most challenging energy and environmental problems facing the world today whether regionally or globally. Gas flaring becomes a public concern and a priority issue because it's waste of a non-renewable source in addition to environmental problems due to gas emissions that produce greenhouse effects. Also, it represents definite risks to human health. Air emissions calculations were conducted based on the international guidelines and found that CO2 pollutant is the main source of the emissions in the gas plant, the yearly emissions of CO2 are 343.3 Ton /year. The second source of emissions in the gas plant is CH4. The yearly emissions from methane CH4 is 3.3 Ton/year. The other sources of emissions in the gas plant include CO, NOx and VOC. Total GHG emissions from the gas project Facilities during normal operation are estimated to be 55,133 Ton/year CO2 equivalents. CO2 is the main GHG pollutant, which contributes over 91% of the GHG. The calculated GHG intensity of the gas project facilities is 0.05 Tons of CO2 equivalents per ton of the total production. To minimize the emissions and GHG in the process facilities of the gas plant waste heat recovery unit must be installed, Ultra-Low NOx Burners is recommended for minimizing NOx emissions, CO2 Gas injection to the reservoir to be installed and finally the energy efficiency of the project facilities should be improved by enhancing heat integration and recovery throughout the plant