腐植酸钠复合吸附剂的制备及其脱硫性能

采用浸渍法，制得腐植酸钠/氧化铝复合脱硫剂，研究其负载氨水前后的脱硫性能.利用傅里叶红外变换光谱仪、扫描电镜、X射线能谱仪、X射线衍射仪对吸附剂样品的表面成分和结构、晶相组成进行了分析.结果表明，负载腐植酸钠后，在氧化铝纤维表面会形成一层腐植酸钠膜，可以提高载体氧化铝的脱硫性能.腐植酸钠/氧化铝浸渍氨水后，腐植酸钠膜在脱硫过程中起重要作用，对氨水有较强的吸附和保持力，可以减少氨损，长时间保持较高的SO2转化率.脱硫后的产物可以从氧化铝上洗脱，制成以硫酸氨、腐植酸铵、腐植酸钠为主要成分的复合肥，同时氧化铝纤维也可实现循环使用.

Preparation of Adsorbent of Sodium Humate and Its Desulfurization Properties

A novel method of flue gas desulfurization (FGD) by sodium humate (HNa) was put forward. The composite adsorbent of HNa/α Al2O3, characterized by FTIR, XRD, EDS, and SEM, was prepared by impregnation method, and the desulfurization property of the adsorbent impregnated with ammonia (NH4OH) was studied in a fixed bed quartz reactor. The experimental results show that the HNa coating, which coats onto α Al2O3 fibers impregnated with HNa solution, can improve the property of α Al2O3 support for FGD; the HNa coating on the adsorbent of HNa/α Al2O3 impregnated with ammonia plays an key role in improving the desulfurization property of the α Al2O3. The lost ammonia is decreased and the longer time of high SO2 conversation rate can be maintained, because of the great adsorption capability of HNa. Furthermore, the desulfurization products can be flushed from the α Al2O3 fibers, and made into a compound fertilizer consisting of ammonium sulfate ((NH4)2SO4), ammonium humate and HNa. The regenerated α Al2O3 fibers can be recycled.