摘要
研究了不同比表面积的沥青基球状活性炭（ＰＳＡＣ）在Ｏ２和Ｈ２Ｏ存在下脱除ＳＯ２的能力．结果表明，比表面积较大的ＰＳＡＣ具有较强的脱除ＳＯ２能力．在本实验条件下，三种不同比表面积的ＰＳＡＣ对ＳＯ２及ＳＯ２＋Ｏ２的吸附量无明显区别，但对Ｈ２Ｏ的吸附量随比表面积增大而增大，与样品的脱硫活性随比表面积增大的变化规律相一致，表明较多的水有利于ＳＯ２的脱除．这可归因于水既有利于样品活性部位上的ＳＯｘ转化成Ｈ２ＳＯ４，又能洗脱所生成的Ｈ２ＳＯ４，减少活性位上的Ｈ２ＳＯ４量。
The catalytic performance of pitch based spherical activated carbon with different specific surface area was investigated for the removal of SO 2 at room temperature,using a simulated flue gas.The results indicated that PSAC with the higher specific surface area exhibited the higher activity than one with the lower specific surface area.The amounts of adsorbed SO 2 or SO 2+O 2 over PSACs were almost the same regardless of the specific surface area of PSACs,however,the amounts of adsorbed H 2O increased with the increase of the specific surface area of PSACs,indicating that the larger amount of adsorbed H 2O was an important contributor to high activity of PSAC.After H 2SO 4 in active sites was washed out by H 2O,the active sites once again became available to react with SO 2,thereby enhancing SO 2 removal over PSAC.
出处
《煤炭转化》
CAS
CSCD
1999年第1期76-79,共4页
Coal Conversion
基金
国家自然科学基金
