International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators
|
|
|
AP/IA-03 Electron Beam Flue Gas Treatment (EBFGT) Technology for Simultaneous Removal of SO2 and NOx from Combustion of Liquid Fuels: Technical and Economic Evaluation A.A. Basfar1, O.I. Fageeha2, N. Kunnummal2, S. Al-Ghamdi2, A.G. Chmielewsky3, J. Licki4, A. Pawelec3, B. Tymiński3, and Z. Zimek3 1King Abdulaziz City of Science and Technology, Atomic Energy Research Institute, Radiation Technology Center, Riyadh, Saudi Arabia Corresponding Author: abasfar@kacst.edu.sa Among emerging technologies for Environmental Protection, Electron Beam Flue Gas Treatment (EBFGT) technology is the most promising and was already implemented in few industrial plants in different parts of the world. In order to evaluate the potential of implementing BFGT technology in the case of flue gas generated during fuel oil combustion, Saudi Arabian Oil Company (Saudi Aramco) initiated a project entitled “Feasibility Study for Electron Beam Flue Gas Treatment (EBFGT) at Oil Fired Boiler” which was conducted by King Abdulaziz City for Science and Technology (KACST) and Institute of Nuclear Chemistry and Technology (INCT) in Poland. The detailed study of this process was performed in a laboratory by irradiating the exhaust gas from the combustion of three grades of Arabian fuels with an electron beam from accelerator (800keV, max. beam power 20 kW). SO2 removal is mainly dependent on ammonia stoichiometry, flue gas temperature and humidity and irradiation doses up to 8 kGy. NOx removal depends primarily on irradiationdose. Highremoval efficiencies up to 98% for SO2 and up to 82% for NOx were obtained under optimal conditions. Flue gas generated during heavy oil combustion is characterized by high humidity, high sulfur dioxide content and relatively low nitrogen oxides concentration. In spite of this, the process is similar to that of flue gas from coal fired boilers. The flue gas emitted from combustion of high-sulfur fuel oils after electron beam irradiation meets the stringent emission standards for both pollutants. The by-product, which is a mixture of ammonium sulfate and nitrate can be used as a fertilizer as such orblended with other components to produce commercial agricultural fertilizer. In addition, general concept of EBFGT installation for oil fired boilers and basic operational parameters are presented. On this basis economic analysis of investment and operational costs of the installation is also presented and factors affecting costs of the installation are discussed. |
