| Title: | Carbon material formation on SBA-15 and Ni-SBA-15 and residue constituents during acetylene decomposition |
| Author(s): | Chiang HL; Wu TN; Ho YS; Zeng LX; |
| Address: | "Department of Risk Management, China Medical University, Taichung 40402, Taiwan. Electronic address: hlchiang@mail.cmu.edu.tw. Department of Public Health, China Medical University, Taichung 40402, Taiwan. Department of Applied Chemistry and Materials Science, Fooyin University, Kaohsiung 831, Taiwan. Department of Risk Management, China Medical University, Taichung 40402, Taiwan" |
| DOI: | 10.1016/j.jhazmat.2014.05.016 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Carbon materials including carbon spheres and nanotubes were formed from acetylene decomposition on hydrogen-reduced SBA-15 and Ni-SBA-15 at 650-850 degrees C. The physicochemical characteristics of SBA-15, Ni-SBA-15 and carbon materials were analyzed by field emission scanning electronic microscopy (FE-SEM), Raman spectrometry, and energy dispersive spectrometry (EDS). In addition, the contents of polyaromatic hydrocarbons (PAHs) in the tar and residue and volatile organic compounds (VOCs) in the exhaust were determined during acetylene decomposition on SBA-15 and Ni-SBA-15. Spherical carbon materials were observed on SBA-15 during acetylene decomposition at 750 and 850 degrees C. Carbon filaments and ball spheres were formed on Ni-SBA-15 at 650-850 degrees C. Raman spectroscopy revealed peaks at 1290 (D-band, disorder mode, amorphous carbon) and 1590 (G-band, graphite sp(2) structure)cm(-1). Naphthalene (2 rings), pyrene (4 rings), phenanthrene (3 rings), and fluoranthene (4 rings) were major PAHs in tar and residues. Exhaust constituents of hydrocarbon (as propane), H2, and C2H2 were 3.9-2.6/2.7-1.5, 1.4-2.8/2.6-4.3, 4.2-2.4/3.2-1.7% when acetylene was decomposed on SBA-15/Ni-SBA-15, respectively, corresponding to temperatures ranging from 650 to 850 degrees C. The concentrations of 52 VOCs ranged from 9359 to 5658 and 2488 to 1104ppm for SBA-15 and Ni-SBA-15 respectively, at acetylene decomposition temperatures from 650 to 850 degrees C, and the aromatics contributed more than 87% fraction of VOC concentrations" |
| Keywords: | "Acetylene/*chemistry Adsorption Carbon/*chemistry Microscopy, Electron, Scanning Nitrogen/chemistry Polycyclic Aromatic Hydrocarbons/analysis Silicon Dioxide/*chemistry Spectrum Analysis, Raman Volatile Organic Compounds/analysis/classification Acetylene;" |
| Notes: | "MedlineChiang, Hung-Lung Wu, Trong-Neng Ho, Yung-Shou Zeng, Li-Xuan eng Research Support, Non-U.S. Gov't Netherlands 2014/05/27 J Hazard Mater. 2014 Jul 15; 276:43-51. doi: 10.1016/j.jhazmat.2014.05.016. Epub 2014 May 13" |
