EXPERIMENTAL INVESTIGATION ON THE DIRECT LIMESTONE-H2S REACTION IN A PRESSURIZED THERMOGRAVIMETRIC ANALYZER
Sulfidation experiments with Chinese limestones were performed in a pressurized thermogravimetric analyzer (PTGA) under noncalcining conditions. The effects of total pressure (0.1-1.5 MPa), reaction temperature (700-950 ℃), H2S molar fraction (0.1％-5.0％) on the sorbent conversions were analyzed. Experimental results show that the sulfidation of fully calcined limestone is much faster than the reaction of noncalcined limestone. The sulfidation rate increases with total pressure when the volume fraction of H2S is constant. However, the rate of sulfidation decreases with the increase of total pressure when the H2S partial pressure is constant. Reaction temperature affects the sulfidation greatly, the initial reaction rate increases with temperature. However, it is not necessary to obtain the high final conversion at high temperatures. At higher temperature, the sintering of sample is more serious resulting in the decrease in the sulfidation rate. The sulfidation is the first order with respect to H2S partial pressure for the limestone.
sulfidation limestone pressurized thermogravimetric analyzer
Zhanlong SONG Mingyao ZHANG Chunyuan MA
School of Energy and Power Engineering, Shandong University, Jinan, P.R.China Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, So
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
565-570
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）