Over 180,000 TPY (tons per year) of waste tire rubbers (WTRs) are to be disposed of in Taiwan. The waste tire rubber chips (WTRCs) also contain special hydrophobic and oil-philic properties for absorptive recovery of spilled oils on contaminated ground or seashore. Experimentally, waste tires were cut as 10-20 mesh chips to sorb spilled oil (motor oil), and then liquefied into product oils at 643 K, 1 atm. Valuable oil gases and carbon black powder were also produced in the period of WTRCs liquefaction. The product oils could be directly used without further purification due to similar methyl content with that of fresh motor oils. Flammable oil gases mainly containing C3 (11.32%) and C4 (31.40%) hydrocarbons had potential to be fuel gases. Ultrafine carbon black powders (c.a. 100 nm) with mesopores produced from WTRCs liquefaction were observed and analyzed. Elements (Si: 90.56%, Zn: 3.65%, S: 4.89%, Ca: 0.58%, and Cu: 0.10%) on carbon black powder surface from bead ring of tire were detected. Bond lengths of S and Fe atoms were respectively Fe-S (2.17 Å) and Fe-(S)-Fe (3.05 Å) with coordination numbers of 5.6 and 3.9. The economic paybacks of 20- A nd 10-TPD of these processes were evaluated to be 2.5 and 3.2 years, respectively.
All Science Journal Classification (ASJC) codes
- Chemical Engineering (miscellaneous)
- Waste Management and Disposal
- Process Chemistry and Technology