A feasibility Study on the exhaust-gas treatment efficiency of a wet-scrubber system equipped in a diesel engine: A focus on smoke emission50 views
Keywords:Engine exhaust gas; Exhaust gas after-treatment; Wet scrubber.
A feasibility examination was conducted on a wet-scrubber system designed in this study to investigate the exhaust gas treatment efficiency of a wet-scrubber system equipped with a diesel engine. This preliminary investigation limits to evaluate the feasibility of the wet scrubber system in decreasing smoke. The influence of multiphase flow configuration in wet-scrubbing aftertreatment systems on emission formation is an interesting topic in the field of exhaust gas aftertreatment. It is our initial attempt to investigate the influence of multiphase flow configuration in a wet-scrubbing hybrid aftertreatment system on key pollutants emitted from Diesel engines in the future. This wet scrubber works by spraying water into the exhaust gas stream. The engine was tested at three-speed conditions (1,500 rpm, 1,800 rpm, and 2,000 rpm, respectively) while varying its torque from 15 to 30 N.m. The results show that under these operating conditions, the smoke level after the scrubber decreases by up to 50%. Please note that only fresh water was used in this study, and the impact of catalysts that could further decrease exhaust gas pollution will be investigated in future studies. The water droplets serve as a medium for capturing and collecting the soot particles present in the exhaust gas. Through collisions, the water droplets cause the soot particles to adhere to their surfaces, a process known as impaction. Additionally, the larger water droplets can facilitate coagulation or agglomeration of the particles, resulting in their enlargement and enhanced capture efficiency.
. P. X. Pham, N. V. Pham, T. V. Pham, V. H. Nguyen, and K. T. Nguyen, "Ignition delays of biodiesel-diesel blends: Investigations into the role of physical and chemical processes," Fuel, vol. 303, p. 121251, (2021). DOI: https://doi.org/10.1016/j.fuel.2021.121251
. P. Pham, D. Vo, and R. Jazar, "Development of fuel metering techniques for spark ignition engines," Fuel, vol. 206, pp. 701-715, (2017). DOI: https://doi.org/10.1016/j.fuel.2017.06.043
. D. H. Mussatti, P., "Particulate Matter Controls/ Chapter 2. Wet Scrubbers for Particulate Matter," U.S. Environmental Protection Agency, (2002). https://www3.epa.gov/ttncatc1/dir1/cs6ch2.pdf
. I. Lienhard and H. John, "A heat transfer textbook". Phlogiston press, (2005).
. K. Selvakumar and M. Y. Kim, "Numerical Investigation of the Flow Characteristics inside the Scrubber Unit," International Journal of Mechanical and Mechatronics Engineering, vol. 9, no. 2, pp. 224-228, (2015).
. U. S. E. P. A. (EPA), "Exhaust Gas Scrubber Washwater Effluent," vol. EPA‐800‐R‐11‐006, (2011).
. G. H. Schnakenberg and A. D. Bugarski, "Review of technology available to the underground mining industry for control of diesel emissions" (no. 9462). US Department of Health and Human Services, Public Health Service, (2002).
. R.-t. Guo et al., "The absorption kinetics of NO into weakly acidic NaClO solution," Separation Science and Technology, vol. 48, no. 18, pp. 2871-2875, (2013). DOI: https://doi.org/10.1080/01496395.2013.808214
. S. Yang, Z. Han, X. Pan, Z. Yan, J. Yu, "Nitrogen oxide removal using seawater electrolysis in an undivided cell for ocean-going vessels," RSC advances, vol. 6, no. 115, pp. 114623-114631, (2016). DOI: https://doi.org/10.1039/C6RA24537D
. Z. Han, B. Liu, S. Yang, X. Pan, and Z. Yan, "NOx removal from simulated marine exhaust gas by wet scrubbing using NaClO solution," Journal of Chemistry, vol. 2017, (2017). DOI: https://doi.org/10.1155/2017/9340856
. S. Wilailak, B.-H. Yoo, Y. Kim, and C.-J. Lee, "Parametric analysis and design optimization of wet SOx scrubber system in marine industry," Fuel, vol. 304, p. 121369, (2021). DOI: https://doi.org/10.1016/j.fuel.2021.121369
. H. Jang et al., "Development of parametric trend life cycle assessment for marine SOx reduction scrubber systems," Journal of cleaner production, vol. 272, p. 122821, (2020). DOI: https://doi.org/10.1016/j.jclepro.2020.122821
. E. Fridell and K. Salo, "Measurements of abatement of particles and exhaust gases in a marine gas scrubber," Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, vol. 230, no. 1, pp. 154-162, (2016). DOI: https://doi.org/10.1177/1475090214543716
. F. Di Natale, F. La Motta, C. Carotenuto, M. Tammaro, A. Lancia, "Condensational growth assisted Venturi scrubber for soot particles emissions control," Fuel Processing Technology, vol. 175, pp. 76-89, (2018). DOI: https://doi.org/10.1016/j.fuproc.2018.01.018