摘要
采用浸渍法一步合成了WO3/SBA-15催化剂,并通过XRD和BET方法对其进行表征。表征结果显示,WO3均匀分散在SBA-15分子筛表面上,且保持SBA-15分子筛的结构,仍属于介孔材料。以活性炭为吸附剂、H2O2为氧化剂、WO3/SBA-15为催化剂、1-甲基-2-吡咯烷酮(NMP)为萃取剂,对FCC汽油进行吸附-氧化萃取深度脱硫,通过单因素实验考察了工艺条件对脱硫率的影响。实验结果表明,优化的氧化萃取脱硫条件为:氧化反应温度60℃、反应时间75 min、30%(w)H2O20.5 mL、WO3/SBA-15催化剂0.16 g、FCC汽油10 mL;NMP与FCC汽油体积比1.0、萃取时间30 min。在此条件下,脱硫率达81.71%。WO3/SBA-15催化剂再生4次后,催化性能降低。
A catalyst, WO3/SBA-15, was prepared through immersion and characterized by means of XRD and BET. The results showed that WO3 was highly dispersed on the surface of SBA-15 and the catalyst still had regular molecular sieve structure with mesopores. The desulfurization of FCC gasoline by adsorption and oxidation-extraction was investigated with active carbon as the adsorbent, H202 as the oxidant, WO3/SBA-15 as the catalyst and 1-methyl-2-pyrrolidone（NMP） as the extractant. The effects of oxidative temperature and time, H202 volume, WO3/SBA-15 mass, volume ratio of extractant to FCC gasoline, and extraction time on the desulfurization rate were studied. The results showed that under the optimal conditions of oxidative temperature 60 ~C and time 75 min, 30%（w） H202 volume 0.5 mL, WO3/SBA-15 catalyst mass 0.16 g, FCC gasoline l0 mL, volume ratio of extractant to FCC gasoline 1.0 and extraction time 30 min, the desulfurization rate reached 81.71%. The oxidation activity of the WO3/SBA-15 catalyst decreased after regeneration four times.
出处
《石油化工》
CAS
CSCD
北大核心
2014年第2期164-168,共5页
Petrochemical Technology
基金
江西省教育厅科研基金项目(GJJ12680)
