摘要
利用自发单层分散原理，将CuCl分散在载体表面制备高效的CO吸附剂，将CUCl与r-Al2O3、4A、13X、NaY、CuY分子筛等高比表面载体混合，在350℃焙烧数小时XRD和EXAFS研究证明CuCI可在载体表面达到原子水平的分散，由于CU+可与CO生成配位键，由此可制得对CO有高吸附容量和选择性的吸附剂．其中CuCI／NaY和CuCI／Cu+Y吸附剂的吸附容量在20℃、CO分压为6OkPa时，分别可高达90mL／g载体和100mL／g载体．经配方优化加粘合剂成型工业放大后的吸附剂PU－1已成功地用于工业上变压吸附分离CO，纯度大于99％，收率大于85％；用于从N2或H2中清除作为杂质存在的CO，可使CO的浓度小于1X10－6mol／L，空速可大于5000h－1．
Based on the principle that compounds can spontaneously disperse to the surfaceof supports to form a monolayer, heating supports of high surface area such as γ-Al2O3, 4A,13X, NaY and CuY zeolites etc. with CuCl adsorbents with CuCl highly dispersed on thesurface of the supports can e btained. XRD and EXAFS experiments have shown that theCuCl is in atomic scale dispersion. The best adsorbents CuCl/NaY and CuCl/CuY can haveCO capacity of 90 mL/g support and 100 mL/g support respectively at 20℃ and CO partialpressure of 60 kPa. A CuCl/zeolite adsorbent PU-1 whcih has optimization recipe and suit-able binder has been made in commercial scale. The adsorbent has been used in a PSA pro-cess successfully to separate CO from gas mixtures of CO, H2,N2, CH4 and CO2- The COproduct has a purity >99% with yield>85%. It has also been used to remove trace CO inH2 or N2 at >5 000 h. The purified gases have CO <1 X 10-6 mol/L.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第7期1159-1165,共7页
Chemical Journal of Chinese Universities
关键词
吸附剂
单层分散
铜
分子筛
一氧化碳
分离
Adsorbent, CO, Adsorptive separation, Monolayer dispersion, Copper zeolite
