摘要
以碳五原料为探针,考察了硫化物对Ni/Al_2O_3-SiO_2催化剂加氢稳定性的影响。利用XRD、DTA-TG和孔结构分析等手段对新鲜和使用过的催化剂进行表征,并对硫化物引起催化剂活性下降的原因和机理进行讨论。结果表明,Ni/A_2O_3-SiO_2催化剂对双烯烃和炔烃的加氢活性基本稳定,转化率为100%,但对单烯烃的加氢活性则与原料中有机硫含量的高低有关。当原料中硫质量浓度小于1.0 mg/L、控制催化剂床层温度在60℃左右时,催化剂的活性稳定性良好。在1套加氢能力为8 kt/a的生产装置上进行了碳五馏分的加氢试验,工业化运行结果表明,Ni/Al_2O_2-SiO_2催化剂具有良好的稳定性。
The effect of sulfides on the catalytic stability of Ni/Al2O3-SiO2 catalyst during hydrogenation of C5 fraction was investigated using a fixed-bed reactor. The fresh and used catalyst samples were characterized by XRD, DTA-TG and pore structure analysis. The causes and mechanism of catalyst deactivation were discussed. Results showed that Ni/Al2O3-SiO2 catalysts exhibited high activity for the hydrogenation of dienes and alkynes with a conversion of 100%; however, the catalytic activity of Ni/Al2O3-SiO2 catalysts for hydrogenation of mono-olefins was significantly affected by the organic sulfur content in raw materials. When the sulfur content in feed was less than 1.0 mg/L and the catalyst bed temperature was 60 ~C, the activity and stability of the catalyst for mono-olefin hydrogenation was excellent. A commercial trial was successfully carried out at an 8 kt/a unit for hydrogenation of C5 fraction, and the operation data showed that the stability of Ni/Al2O3-SiO2 catalysts was perfect.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2010年第9期59-64,共6页
Petroleum Processing and Petrochemicals
关键词
硫化物
加氢
烯烃
催化剂
稳定性
sulfide
hydrogenation
olefin
catalyst
stability
