γ- 氧化铝固定化地衣芽孢杆菌低温下可逆脱除 SO2。
Reversible removal of SO2 at low temperature by Bacillus licheniformis immobilized on γ-Al2O3.
机构信息
Department of Chemical Engineering and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
出版信息
Bioresour Technol. 2011 Jan;102(2):524-8. doi: 10.1016/j.biortech.2010.09.065. Epub 2010 Sep 21.
Bacillus licheniformis R08 biomass was immobilized on γ-Al2O3 and the effects of R08 biomass loading, SO2 concentration, water vapor, oxygen and temperature on removal of SO2 were investigated. The experimental results indicated that SO2 saturation capacity increased with increasing R08 biomass loading and SO2 concentration, but decreased with increasing adsorption temperature. Water vapor activated the adsorbent and promoted SO2 removal. An increase in oxygen concentration from 5 to 10% had little effect on SO2 removal. FTIR analysis revealed that the R08 biomass bound to γ-Al2O3 mainly by forming R-CO-O-Al bonds. X-ray photoelectron spectroscopy analysis indicated that γ-Al2O3 reacted with SO2 and formed aluminum sulfate in the presence of oxygen when R08 biomass loading was 13.8%, but that amido groups of the R08 biomass reacted with SO2 and formed sulfite when biomass loading was 32.4%. Ten continuous adsorption-desorption cycles showed that the adsorbent had an excellent regeneration performance.
地衣芽孢杆菌 R08 生物量被固定在 γ-Al2O3 上，研究了 R08 生物量负载、SO2 浓度、水蒸气、氧气和温度对 SO2 去除的影响。实验结果表明，SO2 饱和容量随着 R08 生物量负载和 SO2 浓度的增加而增加，但随着吸附温度的升高而降低。水蒸气使吸附剂活化并促进 SO2 的去除。氧气浓度从 5%增加到 10%对 SO2 的去除几乎没有影响。FTIR 分析表明，R08 生物量主要通过形成 R-CO-O-Al 键结合到 γ-Al2O3 上。X 射线光电子能谱分析表明，当 R08 生物量负载为 13.8%时，γ-Al2O3 在氧气存在下与 SO2 反应形成硫酸铝，但当生物量负载为 32.4%时，R08 生物量的酰胺基团与 SO2 反应形成亚硫酸盐。十个连续的吸附-解吸循环表明，该吸附剂具有优异的再生性能。
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