Comparison of Existing Methods for Purifying Gases from Ship Propulsion Engines

Abstract This study presents a comprehensive review of current technologies used to reduce exhaust gas emissions from ship propulsion systems in maritime transport. It compares the operational principles, environmental impacts, and economic feasibility of each method. The analysis highlights the advantages and limitations of established and emerging solutions, with particular attention to their effectiveness in pollutant removal and waste generation. The findings underscore the urgent need for integrated and sustainable emission control technologies, and identify hydrogen-based propulsion and microwave technology or electrochemical systems as promising directions for future development.