Effect of hydrogen pressure on free radicals in direct coal liquefaction/coprocessing
- West Virginia Univ., Morgantown, WV (United States)
The objective of this study was to investigate the coprocessing of coal with waste tires and commingled plastics and to characterize the relevant catalysts, using high pressure/high temperature in-situ ESR (Electron Spin Resonance) spectroscopy. The recent results from high pressure ESR spectroscopy are emphasized. During this period, considerable progress was made in developing the high pressure capabilities in in-situ ESR spectroscopy and new results carried out in 1000 psi of H{sub 2}gas are presented. In these experiments, sapphire tubes were used to contain the high pressures at temperatures up to 500{degrees}C. Results of the experiments carried out under 1000 psi of H{sub 2} are compared with those under 1000 psi of non-interacting argon and with the earlier experiments in flowing H{sub 2} gas where the volatiles are removed by the flowing gas. In these experiments, the free radical density N of the Blind Canyon coal was measured at each temperature and pressure by double integration of the ESR signal and calibrating it against a standard. The details of the experimental apparatus and procedures have been described in earlier publications.
- Research Organization:
- USDOE Pittsburgh Energy Technology Center, PA (United States)
- DOE Contract Number:
- FC22-93PC93053
- OSTI ID:
- 198288
- Report Number(s):
- CONF-9508133--; ON: DE96001664
- Country of Publication:
- United States
- Language:
- English
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