Abstract:

The spent catalyst for microcarbon reduction from the industrial residue hydrotreating unit and the regenerated catalyst were characterized by means of BET, ICP, EPMA, TPR and other analysis methods, and their activities were evaluated on a pilot plant. The results showed that, carbon, Ni and V were deposited on the spent catalyst, and the pore volume and specific surface area decreased significantly. After regeneration, the carbon deposit was effectively burned off. The pore volume and specific surface area of the regenerant were respectively restored to about 87% and 84% of that of the freshener. The reduction temperature of H₂ was about 60℃ higher than that of the freshener. The desulfurization, microcarbon removal and Ni+V removal activities were respectively restored to 72.2%, 84.1% and 86.4% of those of the freshener. New technologies need to be developed to remove the deposited metal, so as to further restore the catalyst pore structure and improve the activity of the regenerant.

Key words: fixed-bed, residue hydrotreating, catalyst, deactivation, regeneration, microcarbon reduction

摘要：

利用BET、ICP、EPMA、TPR等分析手段对工业渣油加氢装置运转后脱残炭剂和再生剂进行了分析，并在中试装置上对运转后的催化剂和再生剂进行了活性评价。结果表明，运转后脱残炭催化剂沉积了一定量的积炭和一定量Ni、V，催化剂孔容、比表面积大幅减小。经过再生，积炭得到了有效烧除，再生剂孔容、比表面积分别恢复至新鲜剂87%、84%左右，H₂还原温度比新鲜剂提高了60℃左右，脱硫、脱残炭、脱金属（Ni+V）活性分别恢复至新鲜剂的72.2%、84.1%、86.4%。今后需开发新的技术去除沉积的金属，以进一步恢复催化剂孔道结构，提高再生剂的脱杂质活性。

关键词: 固定床, 渣油加氢, 催化剂, 失活, 再生, 脱残炭