科研之友
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摘要
The desulfurization efficiency and mechanism of the calcination of petroleum coke in ammonia atmosphere at lower than 1000 degrees C were investigated through a series of conditional experiments and comparison with other gases such as H-2. The topics of efficiency and reaction mechanism are usually discussed through investigation by means of the Fourier transform infrared spectroscopy (FT-IR), the Brunauer-Emmett-Teller (BET) technique, and the thermogravimetry coupled with the mass spectrometry (TG-MS). Results showed that in addition to H-2, ammonia not only could retain a high desulfur-ization rate but could also reduce coke loss during the desulfurization process of petroleum coke. The best desulfurization conditions covered a petroleum coke particle size of less than 0.1 mm, a calcination temperature of 800 degrees C in ammonia at-mosphere with a flow rate of 10 L/h, and a heating duration of more than 120 min. Ammonia decomposition, H-2 generation, decline in the activation energy of the carbon-sulfur bonds, and petroleum coke with a largest specific surface area at 800 degrees C are the key goals of desulfurization studied thereby. As proved by TG-MS analysis, given a large quantity of H-2, ammonia can be decomposed at the same temperature to completely come into contact with the sulfur species in petroleum coke to generate H2S.
- 出版日期2016-12-31
- 单位中南大学
