广州化工
廣州化工
엄주화공
Guangzhou Chemical Industry
2015年
22期
46-48
,共3页
Ni%Co%乙醇%氢气
Ni%Co%乙醇%氫氣
Ni%Co%을순%경기
Ni%Co%ethanol%hydrogen
采用沉积-沉淀法制备出γ-Al2 O3、 SiO2和Al2 O3·SiO2负载的Ni-Co催化剂，对催化剂进行性能测试，并用XRD和TPR等手段对催化剂进行了表征。结果表明：Al2 O3·SiO2负载的Ni-Co催化剂在400~450℃时的氢气选择性最高， Al2 O3负载的Ni-Co催化剂在500~600℃时的氢气选择性最高。 XRD结合TPR可知：γ-Al2 O3、 SiO2和Al2 O3·SiO2负载Ni-Co催化剂中都存在不同种类NiO-Al2 O3相和CoOx-Al2 O3相，金属-载体之间的相互作用可以提高活性金属组分Ni和Co的分散度，有利于提高催化剂的性能。
採用沉積-沉澱法製備齣γ-Al2 O3、 SiO2和Al2 O3·SiO2負載的Ni-Co催化劑，對催化劑進行性能測試，併用XRD和TPR等手段對催化劑進行瞭錶徵。結果錶明：Al2 O3·SiO2負載的Ni-Co催化劑在400~450℃時的氫氣選擇性最高， Al2 O3負載的Ni-Co催化劑在500~600℃時的氫氣選擇性最高。 XRD結閤TPR可知：γ-Al2 O3、 SiO2和Al2 O3·SiO2負載Ni-Co催化劑中都存在不同種類NiO-Al2 O3相和CoOx-Al2 O3相，金屬-載體之間的相互作用可以提高活性金屬組分Ni和Co的分散度，有利于提高催化劑的性能。
채용침적-침정법제비출γ-Al2 O3、 SiO2화Al2 O3·SiO2부재적Ni-Co최화제，대최화제진행성능측시，병용XRD화TPR등수단대최화제진행료표정。결과표명：Al2 O3·SiO2부재적Ni-Co최화제재400~450℃시적경기선택성최고， Al2 O3부재적Ni-Co최화제재500~600℃시적경기선택성최고。 XRD결합TPR가지：γ-Al2 O3、 SiO2화Al2 O3·SiO2부재Ni-Co최화제중도존재불동충류NiO-Al2 O3상화CoOx-Al2 O3상，금속-재체지간적상호작용가이제고활성금속조분Ni화Co적분산도，유리우제고최화제적성능。
Ni-Co catalysts supported on γ-Al2 O3 , SiO2 and Al2 O3 · SiO2 were prepared using precipitation-impregnation method. The performance was studied, the structure and surface characteristics of the catalysts were measured by XRD and TPR. It was revealed that Ni-Co catalysts supported Al2 O3 ·SiO2 had much higher H2 selectivity than others in the range of 400~450 ℃. Ni-Co catalysts supported Al2 O3 had much higher H2 selectivity than others in the range of 500~600 ℃. XRD and TPR revealed that different species NiO-Al2 O3 and CoOx-Al2 O3 phases existed in Ni-Co catalysts, and the interaction between metal and support can increase the dispersion of Ni and Co, it can improve the catalytic performance.
