【摘要】 选取独山子石油焦为原料,以物理活化法制得比表面积达500m2/g-900m2/g的活性炭,进行吸附脱硫研究。采用酸氧化法对活性炭孔结构和微观孔径分布进行改性。酸氧化使活性炭表面酸性官能团含量明显增加,增加量约为原来的5倍。活性炭吸附脱硫性能随表面酸性官能团含量的增加而增大。理想的酸化条件是浓硝酸120℃氧化40min。通过静态吸附实验,活性炭吸附脱硫的最佳条件是,温度25℃,压力1.0M Pa,静态吸附6h。最佳条件下吸附脱硫可使模型化合物硫的质量分数从137.9×10-6降至3.1×10-6。从活性炭孔径匹配考察可知,平均孔直径在0.8nm-2.1nm的活性炭对模型化合物硫的质量分数降低具有明显效果。更多还原

【Abstract】 Adsorption desulfurization by activated carbon obtained from DuShanzi petroleum coke was investigated.The activated carbon was prepared through the improved physical activation and the surface area reached 500 m2/g～900 m2/g;its porous structure and distribution were modified by acid oxidation.With the surface acid oxidation,the amounts of oxygen function groups on the activated carbon surface increases for almost 5 times more than those on the original activated carbon.The optimum nitric acid oxidation conditions are 120 oC and 40 min.The optimum process conditions of desulfurization are 25 oC,1.0 MPa and 6 hours by static status adsorption.Under these conditions,the sulfur content of model compound decreases from 137.9×10-6 to 3.1×10-6.Activated carbon with the average pore diameter from 0.8 nm to 2.1 nm was effective to reduce the sulfur content in the model compound,it suggest that such a microporous structure could benefit the desulfurization.更多还原