摘要
以Fe元素作为主要金属组分,γ-Al2O3为载体,制备负载不同第二金属组分的XO-Fe2O3/γ-Al2O3双金属催化剂(X为La,Ce,Co,Cu),采用XRD、SEM、氮气吸附-脱附等手段对催化剂进行表征;以H2O2为氧化剂,噻吩为模型硫化物,将含噻吩的正辛烷作为模拟汽油,研究非均相类Fenton试剂催化氧化脱硫过程,考察催化剂中金属元素种类、n(H2O2)/n(S)、催化剂用量等对氧化脱除噻吩效果的影响。结果表明:Fe2O3/γ-Al2O3具有一定的催化H2O2氧化脱硫活性,非均相类Fenton试剂可以催化H2O2产生·OH;在Fe2O3/γ-Al2O3中掺杂少量其它金属可以改变其催化活性,其中以加入Cu后的催化剂活性最高,Cu起到了催化剂助剂的作用,催化剂呈现明显的介孔性质;对于30mL噻吩质量分数为526μg/g的模拟汽油,以CuO-Fe2O3/γ-Al2O3为催化剂,在反应温度333K、催化剂加入量0.2g、n(H2O2)/n(S)=7.40、反应时间120min的条件下,噻吩脱除率达到95.3%以上,有效硫质量分数降至9.4μg/g,达到超深度脱硫效果。
The XO-Fe_2O_3/7-Al_2O_3 （X. La, Ce, Co and Cu） catalysts in Fenton system （catalyst＋ oxi- dant H_2O_2） were prepared and characterized by XRD, SEM and BET techniques. The oxidation of thio- phene in model gasoline （n-octane solution） with heterogeneous Fenton system was tested to investigate the effect of kind of metals, n（H_2 O_2）In（S） and catalyst dosage. The characterized results demonstrate that the catalysts have meso-pore structures. The desulfurization tests indicate that the catalyst Fe_2O_3/γ-Al_2O_3 pro- motes the production of · OH radical from H_2O_2 to oxidize the thiophene, thus improves the removal of thiophene. The addition of second metal can improve the catalytic activity of Fe_2O_3/7-Al_2O_3. Among of them, Cu is the best one. Under the conditions of temperature 333 K, catalyst dosage 0.2 g, n（H_2O_2）/ n（S） =7.40 and reaction time 120 min, 95.3% of thiophene can be removed. The S content in product is reduced to 9.4 μg/g, which meet the ultra-deep desulfurization object.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2015年第4期16-21,共6页
Petroleum Processing and Petrochemicals
基金
天津市应用基础与前沿技术研究计划重点项目(No.14JCZDJC40600)
大学生创新创业训练计划项目(No.201410057043)
关键词
非均相类Fenton体系
催化氧化
汽油
过氧化氢
噻吩
heterogeneous Fenton-like system
catalytic oxidation
gasoline
hydrogen peroxide
thio-phene
