天然气化工(C1化学与化工)
天然氣化工(C1化學與化工)
천연기화공(C1화학여화공)
Natural Gas Chemical Industry
2015年
3期
4-9
,共6页
莫文龙%马凤云%刘红霞%刘景梅%钟梅
莫文龍%馬鳳雲%劉紅霞%劉景梅%鐘梅
막문룡%마봉운%류홍하%류경매%종매
甲烷/二氧化碳重整%氧化铝%Ni基催化剂%模板法
甲烷/二氧化碳重整%氧化鋁%Ni基催化劑%模闆法
갑완/이양화탄중정%양화려%Ni기최화제%모판법
CH4/CO2 reforming%alumina support%Ni based catalyst%template method
采用模板法制备氧化铝(T-Al2O3),并将其及其载Ni催化剂(TC-Al2O3)与市售氧化铝(B-Al2O3)及其载Ni催化剂(BC-Al2O3)进行分别对比。BET表明,T-Al2O3的平均孔径较小,仅为3.32nm,比表面积较高,达477m2·g-1;NH3-TPD表明,T-Al2O3载体表面存在弱酸位和强酸位,但酸性较B-Al2O3弱。 XRD表明,TC-Al2O3还原后的Ni晶粒尺寸较小,仅为5.6nm;H2-TPR表明,催化剂存在结晶态NiO和NiAl10O16尖晶石,且TC-Al2O3的NiO还原峰面积占总还原峰面积的86%,而BC-Al2O3仅为68%。 CH4/CO2重整试验结果表明,TC-Al2O3催化剂不仅具有较高的活性和H2收率,且稳定性好。
採用模闆法製備氧化鋁(T-Al2O3),併將其及其載Ni催化劑(TC-Al2O3)與市售氧化鋁(B-Al2O3)及其載Ni催化劑(BC-Al2O3)進行分彆對比。BET錶明,T-Al2O3的平均孔徑較小,僅為3.32nm,比錶麵積較高,達477m2·g-1;NH3-TPD錶明,T-Al2O3載體錶麵存在弱痠位和彊痠位,但痠性較B-Al2O3弱。 XRD錶明,TC-Al2O3還原後的Ni晶粒呎吋較小,僅為5.6nm;H2-TPR錶明,催化劑存在結晶態NiO和NiAl10O16尖晶石,且TC-Al2O3的NiO還原峰麵積佔總還原峰麵積的86%,而BC-Al2O3僅為68%。 CH4/CO2重整試驗結果錶明,TC-Al2O3催化劑不僅具有較高的活性和H2收率,且穩定性好。
채용모판법제비양화려(T-Al2O3),병장기급기재Ni최화제(TC-Al2O3)여시수양화려(B-Al2O3)급기재Ni최화제(BC-Al2O3)진행분별대비。BET표명,T-Al2O3적평균공경교소,부위3.32nm,비표면적교고,체477m2·g-1;NH3-TPD표명,T-Al2O3재체표면존재약산위화강산위,단산성교B-Al2O3약。 XRD표명,TC-Al2O3환원후적Ni정립척촌교소,부위5.6nm;H2-TPR표명,최화제존재결정태NiO화NiAl10O16첨정석,차TC-Al2O3적NiO환원봉면적점총환원봉면적적86%,이BC-Al2O3부위68%。 CH4/CO2중정시험결과표명,TC-Al2O3최화제불부구유교고적활성화H2수솔,차은정성호。
An alumina (T-Al2O3) was prepared by template method. T-Al2O3 and the Ni catalyst supported on it (TC-Al2O3) were compared with a commercial alumina (B-Al2O3) and the Ni catalyst supported on it (BC-Al2O3), respectively. BET results showed that T-Al2O3 had smaller average pore diameter of only 3.32nm and higher specific surface area of 477m2·g-1. NH3-TPD results showed that T-Al2O3 held mild and strong acid centers, which was weaker than that of B-Al2O3. XRD characterization results showed that TC-Al2O3 had better NiO dispersion, and its Ni grain size was only 5.6nm after reduction. H2-TPR characterization results indicated that the catalysts existed in the form of crystalline NiO and NiAl10O16 spinel, and the proportion of NiO reduction peak area of TC-Al2O3 in the total reduction peak area was 86%, and it was only 68%for TC-Al2O3. The evaluation experiments for CH4/CO2 reforming showed that TC-Al2O3 had better activity, H2 yield and stability than B-Al2O3.