摘要
考察了不同CuCl2负载量的CuCl2-La(NO3)3/AC吸附剂对乙烯/乙烷混合气中乙烯的吸附分离效果。吸附剂的XRD表征表明,经过焙烧,负载在活性炭上的CuCl2转化为CuCl,从而具有了较好的吸附乙烯性能。随着CuCl2负载量的增加,由于生成的CuCl逐渐堵塞了活性炭孔道,导致了吸附剂比表面积逐渐降低,物理吸附量减少。而随着负载量的增加,Cu(Ⅰ)对乙烯的选择性络合吸附量变大,化学吸附逐渐占据优势,促进了乙烯吸附量的逐渐增加,导致了分离因数的大幅提高,当吸附剂中w(CuCl2)为25%时,乙烯吸附量为1.580mmol/g,分离因数为5.28,均为最大值。
The influence of loading amount of CuCl2 on the performance of CuCl2-La （NO3）/AC for separation of ethylene from ethylene/ethane mixed-gas was investigated. The result of XRD showed that CuCl2, surpported on the activated carbon was reduced to CuCl after calcination, which could improve the adsorbability of ethylene. The specific surface area of adsorbents decreased gradually with the increase of loading amount of CuCl2 due to the pore blockage of activated carbon by the formed CuCl, restdting in the decrease of physical adsorption capacity. However, the chemical adsorption became dominating gradually with the loading amount of CuCl2 increasing due to the increase of the selective adsorption of CuCl for ethylene, which increased the ethylene adsorption amount, and improved the separation factor greatly. For the adsorbent with the optimized loading mass fraction of CuCl2 of 25%, the maximum ethylene adsorption capacity and separation factor of ethylene/ethane, 1.580 mmol ·g^-1 and 5.28, respectively, were obtained.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2008年第6期27-30,42,共5页
Natural Gas Chemical Industry
