活性炭吸附预处理对真油加氢脱硫脱氮的影响

Effect of Adsorption Pretreatment by Activated Carbon on Hydro-desulfurization and Hydro-denitrogenation of Real Oil

该文以活性炭(WV-B)为吸附剂,5种不同真油作为目标吸附油,考察其对5种真油中硫/氮化合物的吸附性能。结果表明,在5种真油中,活性炭对真油Shale Oil的吸附脱氮效果最佳,吸氮量高达2.3 mmol-N.g■,对真油LCO3中硫化物的脱除效果最好,吸附脱硫量为0.8 mmol-S.g■。进一步考察WV-B吸附预处理对加氢脱硫(HDS)脱氮(HDN)的影响。经过吸附预处理,真油LCO3中氮含量从464.47 ppm下降至280.67 ppm,比未预处理时降低了40%,相应的硫含量比未预处理时降低了10%。此外,加氢处理后真油的最终硫含量从1 099 ppm下降至688 ppm,降低了37%。最终氮含量低于50 ppm,比未预处理时降低了55%。

A commercial activated carbon(WV-B)was used as adsorbent to investigate the adsorption performance on sulfur/nitrogen compounds in five real oils.The results showed that among the five kinds of real oils,the nitrogen adsorption capacity for Shale Oil by WV-B was the largest and eached as high as 2.3 mmol-N.gad^-1,while the uptake of sulfur compounds for LCO2 was as high as 0.8 mmol-S.gad^-.In addition,the effect of adsorption pretreatment by WV-B on hydro-desulfurization(HDS)and denitrification(HDN)was further investigated.After adsorption pretreatment,the nitrogen content of LCO3 decreased from 464.47 ppm to 280.67 ppm by 40%,and the corresponding sulfur content was reduced by 10%.With adsorption pretreatment of LCO3,the final sulfur content after HDS and HDN reduced from 1 099 ppm to 688 ppm by 37%,while the final nitrogen content was lower than 50 ppm,a decrease of 55%compared with that in the absence of pretreatment.