The Effect of Low Concentration of Oxygen on the Removal of Stable Sulfur in Coal

Organic and inorganic sulphur compounds releases from high-pyrite coal pyrolysis in H 2 , N 2 and CO 2 : Test case Chinese LZ coal

“…5, 6 and 7, the dominant H 2 S + peak at 625°C refers to di-alkyl sulphides, alkyl-aryl sulphides, and reactive di-aryl sulphides and also to, but less distinct reduction of pyrite into troilite. Additionally, the evolution profile of H 2 S releases in N 2 is quite similar to that in He atmosphere as is reported in many other papers [22,24,37]. AP-TPR/MS(N 2 ) profiles of aliphatic and aromatic CH-fragments (Figs.…”

Inappropriateness of the Standard Method in Sulfur Form Analysis of Char from Coal Pyrolysis

“…Practice shows that the effectiveness of pyrolysis in desulfurization depends largely on the types of coal and the nature of sulfur compounds, as well as the conditions of pyrolysis process, including temperature, heating rate, atmospheres, pressure, residence time, mineral matters, and type of reactor. Over the years, various measures have been taken to reduce the sulfur content of coal pyrolysis char by changing the pyrolysis parameters such as increasing temperature, employing various atmospheres, − demineralizing prior to pyrolysis, , extending residence time, and adding various sulfur adsorbents or catalysts. − Some of the measures are effective in enhancing the removal of sulfur from coal.…”