title: Unregulated emissions from diesel engine with particulate filter using Fe-based fuel borne catalyst.
abstract: The alteration and formation of toxic compounds and potential changes in the toxicity of emissions when using after-treatment technologies have gained wide attention. Volatile organic compound (VOC), carbonyl compound and particle-phase polycyclic aromatic hydrocarbon (PAH) emissions were tested at European Steady State Cycle (ESC) to study unregulated emissions from a diesel engine with a fuel-borne catalyst and diesel particulate filter (FBC-DPF). An Fe-based fuel-borne catalyst was used for this study. According to the results, brake specific emissions of total VOCs without and with DPF were 4.7 and 4.9mg/kWh, respectively, showing a 4.3% increase. Benzene and n-undecane emissions increased and toluene emission decreased, while other individual VOC emissions basically had no change. When retrofitted with the FBC-DPF, total carbonyl compound emission decreased 15.7%, from 25.8 to 21.8mg/kWh. The two highest carbonyls, formaldehyde and acetaldehyde, were reduced from 20.0 and 3.7 to 16.5 and 3.3mg/kWh respectively. The specific reactivity (SR) with DPF was reduced from 6.68 to 6.64mg/kWh. Total particle-phase PAH emissions decreased 66.4% with DPF compared to that without DPF. However, the Benzo[a]pyrene equivalent (BaPeq) with DPF had increased from 0.016 to 0.030mg/kWh. Fluoranthene and Pyrene had the greatest decrease, 91.1% and 88.4% respectively. The increase of two- and three-ring PAHs with DPF indicates that the fuel-borne catalyst caused some gas-phase PAHs to adsorb on particles. The results of this study expand the knowledge of the effects of using a particulate filter and a Fe-based fuel-borne catalyst on diesel engine unregulated emissions.
authors.affiliation: College of Mechanical & Electronic Engineering, Qingdao University, Qingdao 266071, China. Electronic address: qdlizh@163.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.affiliation: National Lab of Auto Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China.
authors.forename: Yunshan
authors.initials: Y
authors.lastname: Ge
authors.affiliation: College of Mechanical & Electronic Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Tiezhu
authors.initials: T
authors.lastname: Zhang
authors.affiliation: College of Mechanical & Electronic Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Jipeng
authors.initials: J
authors.lastname: Zhang
authors.affiliation: National Lab of Auto Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Tan
authors.affiliation: College of Mechanical & Electronic Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Hongxin
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002384:Catalysis; D005742:Gasoline; D007501:Iron / Q000737:chemistry*; D001335:Vehicle Emissions; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D005742:Gasoline; D001335:Vehicle Emissions; D055549:Volatile Organic Compounds; D007501:Iron
keywords: Carbonyl compounds; DPF; Fuel-borne catalyst; Particle-phase PAHs; VOCs