Subbituminous coal chars, properties

Properties. Results for the operation using subbituminous coal from the Wyodad mine near Gillette, Wyoming, are shown in Table 13. Char yields decreased with increasing temperature, and oil yields increased. The Fischer assay laboratory method closely approximated the yields and product assays that were obtained with the TOSCOAL process. 

Figure 6. Properties of char produced from subbituminous coal at 300 psi...

The chars were produced in a process development unit scale fluidized-bed flash pyrolyser (90 from pulverized Mlllmerran and Wandoan subbituminous coals from Queensland, Australia. Mlllmerran coal was pyrolyzed at various temperatures between 500 and 800 C and Wandoan coal at 550°C. The resulting chars were screened to yield a size fraction with a median mass size around 80 pm. Hie properties of the chars are presented in Table I. 

---