摘要
以分子氧为氧化剂,将催化氧化与萃取分离相结合,开展催化汽油氧化萃取脱硫研究。结果表明,与直接萃取相比,汽油经过氧化及溶剂萃取,汽油脱硫率有所提高,并且随着氧化温度的提高而增大,氧化过程对催化汽油脱硫有贡献。催化剂能够加速硫化物氧化反应,几种催化剂的汽油脱硫率从大到小顺序为:氧化铈>碳酸锰或四硼酸钠或氧化锌>硼酸或过硼酸钠。使用氧化锌或碳酸锰催化剂时,随着催化剂用量的增加,汽油脱硫率总体呈现降低的变化趋势。以硼酸为催化剂时,脱硫率随着催化剂用量的增加先增加后降低,认为催化汽油中硫化物的氧化反应符合连串反应机制。
The desulfurization of catalytic cracking gasoline through catalytic oxidation with oxygen and extraction was carried out. The desulfurization rate of catalytic cracking gasoline via oxidation and extraction was bigger than that via single extraction, and increased with the increase of oxidation temperature. The sequence of catalytic desulfuriztion was as follows： cerium oxide 〉 manganese carbonate or sodium tetraborate or zinc oxide 〉 boric acid or sodium perborate. With the increase of catalyst dosage, the desulfurization rate decreased using zinc oxide or manganese carbonate as oxidation catalyst, but first increased and then decreased using boric acid as the catalyst. The study showed that the oxidation reaction of sulfides in FCC gasoline accorded with sequential reaction mechanism.
出处
《工业催化》
CAS
2008年第10期113-116,共4页
Industrial Catalysis
关键词
石油化学工程
催化裂化汽油
脱硫催化剂
氧化
萃取
氧气
petrochemical technology
catalytic cracking gasoline
desulfurization catalyst
oxidation
extraction
oxygen
