渣油加氢工业废催化剂的剖析

Analysis of Used Catalysts from Residue Oil Hydrotreating Plant

对工业运转后的各种渣油加氢催化剂进行物理性质的剖析,结果表明:(1)为了更真实地反映不同状态下催化剂孔体积和比表面积的变化情况,孔体积和比表面积应以单位装填体积催化剂的孔体积和单位装填体积催化剂的比表面积表示,即分别以"ml/ml"和"m2/ml"为单位;(2)所用渣油加氢脱氮催化剂在运转中比表面积损失较大,表明其孔径较小,易被固体沉积物堵塞;(3)现有的渣油加氢催化剂在运转中焦炭沉积量较高,故提高此类催化剂的抗结焦性能是开发催化剂必须考虑的关键问题之一。

Analysis of used catalysts from residue oil hydrotreating plant indicated (1) to describe actual change of pore volume (PV) and specific surface area (SA) of catalysts from different bed location, the unit'ml/ml'and 'm 2/ml'should be used for PV and SA respectively;(2) the SA of HDN catalyst decreased greatly indicating that the pore diameters of the catalyst were too small,easily leading to clogging by solid compounds formed during chemical reactions;(3) improving resistance to coke formation was the key issue to be solved for commercial residue oil hydrotreating catalysts.