Enhancement of diesel particulate matter collectio

Authors: Tran Hong Ha Osami Nishida Hirotsugu Fujita Harano Wataru

Publish Date: 2010/03/16

Volume: 15, Issue: 3, Pages: 271-279

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Abstract

Marine diesel engines are major sources of air pollution They emit a large amount of pollutants including diesel particulate matter DPM carbon oxide CO x unburned hydrocarbons HC nitrogen oxide NO x sulfur oxide SO x and other products of combustion Among these DPM may cause respiratory and mutagenic diseases in humans including lung and bladder cancer see Donaldson et al J Aerosol Sci 29553–560 1998 In this study experiments were performed with an electrostatic waterspraying scrubber EWSS to evaluate its effectiveness for the collection of mass and numberbased DPM emissions from a marine diesel engine The results show that the collection efficiency of the scrubber increases as the engine load increases due to an increase in the large DPM concentration and an increase in the amount of DPM collected by the charged droplets The effect of water spraying performance on DPM collection at constant engine load was investigated experimentally The strength of the electrical attraction between the charged water droplets and the charged DPM within the scrubber led to a significant increase in total DPM collection efficiency up to 4–7 times In addition the total DPM collection efficiency was found to be directly related to the corona power the electrical properties of water water spraying performance and engine load The EWSS appears to be a promising alternative method for controlling massbased as well as numberbased DPM emissions

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