Chemisorption of sulfur on thermally decomposed copper and iron sulfides.
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概要
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The chemisorption of sulfur on thermally decomposed copper and iron sulfides was studied and its application to the desulfurization process of heavy oil was attemped. Thermal decomposition of sulfides was carried out by calcining CuS and FeS<SUB>2</SUB> at 200–800 °C under 10<SUP>−3</SUP> mmHg and with 5 °C/min. Sulfur was adsorbed on the calcined sulfides in toluene. Thermally decomposed copper sulfide (Cu/S: 1–2) easily chemisorbs free sulfur in toluene below 100 °C, but not iron sulfide (Fe/S: 1–0.5). The relationship between sulfur affinity and the structure of partially decomposed sulfide was discussed in terms of the kinetics of initial chemisorption of sulfur and the sulfur adsorption coefficient calculated from the ratio of the adsorbed sulfur to the sulfur required to reform starting CuS and FeS<SUB>2</SUB>. The partially decomposed copper sulfide (Cu<SUB>1</SUB>-<SUB>2</SUB>S) easily chemisorbs free sulfur in heavy oil. Chemisorption might be applied to the desulfurization of heavy oil.
- 公益社団法人 日本化学会の論文
著者
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Yamasaki Nakamichi
Research Laboratory Of Hydrothermal Chemistry Faculty Of Science Kochi University
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