Hydropyrolysis of a high-sulphur-high-calcite Italian Sulcis coal. 1. Hydropyrolysis yields and catalytic effect of the calcite

✍ Scribed by René Cyprès; Samuel Furfari

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 641 KB
• Volume: 61
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(82)90070-9

✦ Synopsis

Hydropyrolysis (HyPy) of a high-sulphur (4.3 wt% mf) and high-calcite (7.3 wt% mf) subbituminous coal (Sulcis coal) has been studied in a semi-batch fixed-bed reactor under a pressure of 1 or 3 MPa from 580 to 850°C. The maximum temperature attained is not necessarily the temperature that the reactor is set but depends on the pressure and nature (reactive or not) of the gas; this phenomenon is due to the heat from the exothermic HyPy reaction. There is a correlation between the amount of heat released during the hydrogenation and the amount of water formed. The maximum conversion obtained is 62.5 wt% maf under H, at 3 MPa and 850°C. The char, oil, water, gas (CH& C,H, C,H,, CO, CO3 yields and the oil analysis are reported. A significant proportion of the COP evolved during the reaction results from the decomposition of the mineral matter rich in carbonates. A proportion of the CO evolved results from the degradation of phenols, a reaction which is catalysed by calcite and/or lime, and as a consequence the oil yield is reduced.