Hydrolysis of COS and CS{sub 2} over alumina catalysts at lower temperature
- Taiyuan Univ. of Technology, Shanxi (China). Research Inst. of Chemical Engineering for Coal
Carbonyl sulfide (COS) and carbon disulfide (CS{sub 2}) widely exist in chemical processing gases from natural gas, coal, Claus tail gas, and petroleum. Those sulfur compound are a major factor of deactivation of synthesis catalysts. Since it is difficult to remove COS and CS{sub 2} completely by the conventional desulfurization, a hydrolysis process has been developed in recent years. The activity of COS and CS{sub 2} hydrolysis was measured in a fixed bed reactor and the surface basicity was studied by CO{sub 2}-TPD. The results showed that the apparent reaction activation energies of COS over three catalysts are 57.80, 52.50 and 44.71 kJ/mol at lower temperature, and those of CS{sub 2}, 55.53, 38.70 and 35.30 kJ/mol, respectively. The apparent activation energies of desorption for weak type basic center over three catalysts were 25.97, 27.92 and 29.77kJ/mol respectively. The surface basicity on catalysts played an important role in the hydrolysis of COS and CS{sub 2}.The weak basic center was the catalytic active center of COS hydrolysis, while the weak and the weaker basic centers took part in catalytic reaction of CS{sub 2} hydrolysis. The K{sub 2}O and Pt loaded on active {gamma}-Al{sub 2}O{sub 3} could greatly change the distribution of surface basicity over catalysts and increase organic sulfide catalytic hydrolysis.
- OSTI ID:
- 324811
- Report Number(s):
- CONF-970931-; TRN: IM9911%%508
- Resource Relation:
- Conference: 14. annual international Pittsburgh coal conference and workshop: clean coal technology and coal utilization, Taiyuan (China), 23-27 Sep 1997; Other Information: PBD: 1997; Related Information: Is Part Of Fourteenth annual international Pittsburgh coal conference and workshop: Proceedings; PB: [1500] p.
- Country of Publication:
- United States
- Language:
- English
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