OPEN ACCESS

Articles online

Gas- and Water-Phase PAHs Emitted from a Single Hydrogen-Oxygen PEM Fuel Cell

Category: Air Toxics

Accepted Manuscripts
DOI: 10.4209/aaqr.2017.10.0410
PDF | RIS | BibTeX

Kuo-Lin Huang 1, Tsung-Hsuan Tsai1, Shui-Jen Chen1, How-Ran Chao1, Yi-Ming Kuo2, Jen-Hsiung Tsai1

  • 1 Department of Environmental Engineering and Science, National Pingtung University of Science and Technology, Neipu, Pingtung 91201, Taiwan
  • 2 Department of Safety Health and Environmental Engineering, Chung Hwa University of Medical Technology, Tainan City 71703, Taiwan

Highlights

Gas- and water-phase PAHs emitted from a PEMFC are compared.
Temperature influences more on water-phase than on gas-phase PAH profiles.
The gas- and water-phase PAHs have different concentration profiles.
The emission factors of water-phase PAHs increase with increasing flowrate.
The emission factors are smaller for water-phase PAHs than for gas-phase ones.


Abstract

This study focuses on the comparison between gas- and water-phase polycyclic aromatic hydrocarbons (PAHs) emitted from a single hydrogen-oxygen proton exchange membrane (PEM) fuel cell (FC) under different flowrates and temperatures. The results show that among 21 PAHs, the most and least dominant species were Nap and BeP, respectively. At 65°C, the concentrations of individual gas- and water-phase PAHs decreased with increasing flowrate, and the PAH concentrations were lower at anode than at cathode. The concentrations of gas-phase Total-PAHs or Total-BaPeq were slightly lower at 65°C than at 90°C, but an opposite trend was observed for water-phase ones. Temperature influenced more on water-phase than on gas-phase PAH concentration profiles, and the gas- and water-phase PAHs had different concentration profiles. The performance of membrane-electrode assembly (MEA) decreased with increasing flowrate or temperature. The emission factor (EF) sum (anode + cathode) for gas- or water-phase Total-PAHs increased with increasing flowrate. This tendency is also true for gas-phase Total-PAHs EFs but not for water-phase ones when raising temperature from 65°C to 90°C. At 65°C and 52/35 sccm, the EF sums of water-phase Total-PAHs and Total-BaPeq were 2.18 ± 0.04 and 0.09 ± 0.00 µg g-MEA–1, respectively, smaller than those of gas-phase ones (3.02 ± 0.09 and 0.12 ± 0.00 µg g-MEA–1, respectively). More environmental concern should be paid to the emitted gas-phase PAHs than water-phase ones because the anode and cathode effluents should be recycled and reused during PEMFC operation.

Keywords

Polycyclic aromatic hydrocarbon Proton exchange membrane fuel cell Emission factor Gas-phase PAH Water-phase PAH


Related Article

PCDD/F Formation in Milled Fly Ash: Metal Chloride Catalysis

Ishrat Mubeen, Xiaoqing Lin , Alfons Buekens, Xuan Cao, Shengyong Lu, Minghui Tang, Jianhua Yan
Volume: 17 | Issue: 11 | Pages: 2858-2866
DOI: 10.4209/aaqr.2017.08.0279
PDF | Supplemental material

Gas-Particle Partitioning of Polychlorinated Dibenzo-p-dioxins, Dibenzofurans, and Biphenyls in Flue Gases from Municipal Solid Waste Incinerators

Ying Han, Wenbin Liu , Haifeng Li, Rongrong Lei, Lirong Gao, Guijin Su, Guorui Liu
Volume: 17 | Issue: 11 | Pages: 2847-2857
DOI: 10.4209/aaqr.2017.09.0308
PDF | Supplemental material

Atmospheric PM2.5 and Polychlorinated Dibenzo-p-dioxin and Dibenzofuran in a Coastal Area of Central Taiwan

Chung-Ling Chen, Shih-Tsung Tang, Jinning Zhu , Sheng-Lun Lin
Volume: 17 | Issue: 11 | Pages: 2829-2846
DOI: 10.4209/aaqr.2017.10.0382
PDF

Source Apportionment of Air Pollution and Characteristics of Volatile Organic Compounds in a Municipal Wastewater Treatment Plant, North Taiwan

Dika Rahayu Widiana, Sheng-Jie You, Hsi-Hsien Yang, Jung-Hsuan Tsai, Ya-Fen Wang
Volume: 17 | Issue: 11 | Pages: 2878-2890
DOI: 10.4209/aaqr.2017.09.0317
PDF | Supplemental material
;