Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal
Coal tar pitch (CTP) is abundant and widely used, but its properties will be affected due to oxidation aging during storage. In this study, CTP was oxidized by simulating the air oxidation process, and the change of chemical structure has been analyzed by Fourier transform infrared spectroscopy (FTI...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/11/12/1428 |
| _version_ | 1797506339664035840 |
|---|---|
| author | Liqing Chen Fanhui Guo Jianjun Wu Ping Li Yixin Zhang |
| author_facet | Liqing Chen Fanhui Guo Jianjun Wu Ping Li Yixin Zhang |
| author_sort | Liqing Chen |
| collection | DOAJ |
| description | Coal tar pitch (CTP) is abundant and widely used, but its properties will be affected due to oxidation aging during storage. In this study, CTP was oxidized by simulating the air oxidation process, and the change of chemical structure has been analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and both gas chromatography and mass spectrometry (GCMS). The effects of the oxidized and unoxidized CTP co-carbonization with coal on the polycyclic aromatic hydrocarbons (PAHs) emission were detected by GCMS. The small and medium-molecule aromatic substances were reduced during CTP oxidation, while the intermolecular condensation reaction increased the macromolecules content. The catalytic can effectively facilitate the dehydrogenation and condensation reaction of CTP and the entry of oxygen molecules, which leads to the increase of oxygen-containing groups and the decrease of PAHs. Compared to the raw CTP, the catalytic oxidized CTP significantly reduced the emissions of toxic PAHs during the co-carbonization with coal. A possible catalytic mechanism of CTP catalytic oxidation is proposed. |
| first_indexed | 2024-03-10T04:31:15Z |
| format | Article |
| id | doaj.art-da3e04a853514ab1a281a4830e7028fe |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T04:31:15Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-da3e04a853514ab1a281a4830e7028fe2023-11-23T04:08:47ZengMDPI AGCatalysts2073-43442021-11-011112142810.3390/catal11121428Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with CoalLiqing Chen0Fanhui Guo1Jianjun Wu2Ping Li3Yixin Zhang4School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaNational Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou 221116, ChinaCoal tar pitch (CTP) is abundant and widely used, but its properties will be affected due to oxidation aging during storage. In this study, CTP was oxidized by simulating the air oxidation process, and the change of chemical structure has been analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and both gas chromatography and mass spectrometry (GCMS). The effects of the oxidized and unoxidized CTP co-carbonization with coal on the polycyclic aromatic hydrocarbons (PAHs) emission were detected by GCMS. The small and medium-molecule aromatic substances were reduced during CTP oxidation, while the intermolecular condensation reaction increased the macromolecules content. The catalytic can effectively facilitate the dehydrogenation and condensation reaction of CTP and the entry of oxygen molecules, which leads to the increase of oxygen-containing groups and the decrease of PAHs. Compared to the raw CTP, the catalytic oxidized CTP significantly reduced the emissions of toxic PAHs during the co-carbonization with coal. A possible catalytic mechanism of CTP catalytic oxidation is proposed.https://www.mdpi.com/2073-4344/11/12/1428coal tar pitchcatalyst air oxidationAlCl<sub>3</sub>co-carbonizationPAHs |
| spellingShingle | Liqing Chen Fanhui Guo Jianjun Wu Ping Li Yixin Zhang Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal Catalysts coal tar pitch catalyst air oxidation AlCl<sub>3</sub> co-carbonization PAHs |
| title | Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal |
| title_full | Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal |
| title_fullStr | Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal |
| title_full_unstemmed | Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal |
| title_short | Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal |
| title_sort | research on coal tar pitch catalytic oxidation and its effect on the emission of pahs during co carbonation with coal |
| topic | coal tar pitch catalyst air oxidation AlCl<sub>3</sub> co-carbonization PAHs |
| url | https://www.mdpi.com/2073-4344/11/12/1428 |
| work_keys_str_mv | AT liqingchen researchoncoaltarpitchcatalyticoxidationanditseffectontheemissionofpahsduringcocarbonationwithcoal AT fanhuiguo researchoncoaltarpitchcatalyticoxidationanditseffectontheemissionofpahsduringcocarbonationwithcoal AT jianjunwu researchoncoaltarpitchcatalyticoxidationanditseffectontheemissionofpahsduringcocarbonationwithcoal AT pingli researchoncoaltarpitchcatalyticoxidationanditseffectontheemissionofpahsduringcocarbonationwithcoal AT yixinzhang researchoncoaltarpitchcatalyticoxidationanditseffectontheemissionofpahsduringcocarbonationwithcoal |