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Unregulated emissions from diesel engine with particulate filter using Fe-based fuel borne catalyst.

Hong Zhao¹, Yunshan Ge², Tiezhu Zhang¹

¹College of Mechanical & Electronic Engineering, Qingdao University, Qingdao 266071, China.

Journal of Environmental Sciences (China)

|October 8, 2014

Summary

This study examined unregulated emissions from diesel engines using a fuel-borne catalyst and diesel particulate filter (FBC-DPF). While carbonyl and PAH emissions decreased, total volatile organic compounds (VOCs) slightly increased, with some specific compounds showing changes.

Keywords:

Carbonyl compounds DPF Fuel-borne catalyst Particle-phase PAHs VOCs

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Published on: February 19, 2018

Area of Science:

Environmental Science
Mechanical Engineering
Chemistry

Background:

After-treatment technologies for diesel engines can alter toxic emissions.
Understanding unregulated emissions is crucial for assessing environmental impact.

Purpose of the Study:

To investigate the effects of a fuel-borne catalyst and diesel particulate filter (FBC-DPF) on unregulated emissions from a diesel engine.
To analyze changes in volatile organic compounds (VOCs), carbonyl compounds, and particle-phase polycyclic aromatic hydrocarbons (PAHs).

Main Methods:

Testing emissions under the European Steady State Cycle (ESC).
Utilizing an iron-based fuel-borne catalyst in conjunction with a diesel particulate filter.
Quantifying specific VOCs, carbonyls, and PAHs, including Benzo[a]pyrene equivalents (BaPeq).

Main Results:

Total VOC emissions increased by 4.3%.
Total carbonyl compound emissions decreased by 15.7%, with significant reductions in formaldehyde and acetaldehyde.
Total particle-phase PAH emissions decreased by 66.4%, but Benzo[a]pyrene equivalents (BaPeq) increased.
Increased two- and three-ring PAHs suggest gas-phase PAH adsorption onto particles due to the catalyst.

Conclusions:

The FBC-DPF system impacts unregulated emissions differently across compound classes.
While effective in reducing carbonyls and total PAHs, the system led to a slight increase in total VOCs and a concerning rise in BaPeq.
Further research is needed to fully understand the complex interactions and optimize after-treatment systems for diesel engines.