甲烷在富纳米孔炭质吸附剂上的吸附
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摘要: 分析了以石油焦为原料采用复合活化工艺制备的吸附剂的孔结构特性。发现吸附剂微孔含量在90%以上并且主要集中于1 nm～2 nm之间，是富含纳米孔的吸附材料。甲烷在此吸附剂上的吸附研究表明，在25 ℃，3.5 MPa的条件下，甲烷质量吸附量超过14.0%；有效体积吸附量超过120?V/V(吸附甲烷的体积/容器的体积)。甲烷在富纳米孔炭质吸附剂上的等温吸附曲线表明，吸附类型属于Ⅰ类吸附，符合微孔填充理论；等压吸附曲线表明，低温有利于体积吸附量的增加；吸附剂中水分的增加对吸附有不利的影响。Abstract: A kind of carbonaceous nanometer pore adsorbent was produced from petroleum coke by a composite activation process. The pore width of the adsorbent among 1 nm～2 nm is over 90%. Under the condition of 25 ℃，3.5 MPa，the volume and mass adsorption of methane on the adsorbent are over 120 V/V and 14.0% respectively. Adsorption isotherm shows that the adsorption type belongs to theⅠadsorption, and in according with micropore filling theory; Adsorption isobar shows that low temperature favors the adsorption; the water contained in the adsorbents is harmful to the increase of the adsorption capacity.
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Key words:
- adsorption /
- nanometer pore /
- natural gas
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