高硫石油焦制备高储气性能天然气吸附剂

以高硫石油焦为原料，KOH为活化剂，十二烷基苯磺酸钠（SDBS）为表面活性剂制备天然气吸附剂，分析了高硫焦基吸附剂的孔结构和孔分布特征，讨论了高硫焦制备吸附剂的活化机理。结果表明，预活化中加入表面活性剂SDBS可提高KOH与原料的混合均匀度，对活化效果有利。最优活化条件下制备的吸附剂样品GSR3和GSR4的微孔容积分别达到1.0985cm3·g－1 和1.3193cm3·g－1，孔径分布集中在0.9nm~1.5nm；在25℃、充放气压力3.5MPa和0.1MPa下，GSR3、GSR4对甲烷的质量吸附量分别达到0.139和0.145，有效体积脱附量达到111和115。粉体高硫焦基吸附剂的性能非常接近于低硫焦基吸附剂。

Preparation of high quality natural gas adsorbent from high-sulfur petroleum coke

The natural gas adsorbents were prepared with high sulfur petroleum coke as feed, potassium hydroxide as activation agent and sodium dodecylbenzene sulfonate (SDBS) as surfactant. Their pore texture and pore size distribution were measured and the activation mechanism was suggested. The results showed that the surfactant SDBS during pre activation process can enhance the homogeneity of mixed material, which is then evidently favorable for the activation of high sulfur petroleum coke. The micropore volume of the adsorbents GSR3 and GSR4, prepared under the optimal condition, were 1.0985cm3·g－1and 1.3193cm3·g－1, respectively; and the main pore size distribution was between 0.9nm and 1.5nm. Under 25℃ and the CH4 charging/discharging pressure of 3.5MPa and 0.1MPa, the CH4 mass uptake and effective desorption volume of the adsorbents GSR3 and GSR4 can be up to 0.139 and 0.145, and 111, and 115, respectively. Therefore, the high sulfur petroleum coke based adsorbents are much close to low sulfur petroleum coke based adsorbents in quality.