浙江化工
浙江化工
절강화공
ZHEJIANG CHEMICAL INDUSTRY
2014年
12期
33-37
,共5页
詹国武%李鑫%李瑛%唐浩东%刘化章
詹國武%李鑫%李瑛%唐浩東%劉化章
첨국무%리흠%리영%당호동%류화장
ZrO2-Al2O3复合氧化物%水热稳定性%Ni基催化剂%甲烷化
ZrO2-Al2O3複閤氧化物%水熱穩定性%Ni基催化劑%甲烷化
ZrO2-Al2O3복합양화물%수열은정성%Ni기최화제%갑완화
ZrO2-Al2O3 composite supports%hydrothermal stability%nickel catalyst%methanation
采用并流沉淀法制备了不同配比的ZrO2-Al2O3复合氧化物，并通过浸渍法制备了10% Ni/ZrO2-Al2O3催化剂，考察了复合氧化物载体的水热稳定性及ZrO2与Al2O3的配比对合成气制甲烷Ni基催化剂性能的影响。研究结果表明：ZrO2的添加能在一定程度上抑制Al2O3的水解反应，这可能是ZrO2与Al2O3形成固溶体所致。随着ZrO2含量增加，复合氧化物载体的水热稳定性先降低后升高，当ZrO2与Al2O3质量比为0.24时，载体的水热稳定性最好。不同配比的ZrO2-Al2O3复合氧化物负载Ni基催化剂的稳定性与载体的水热稳定性变化是一致的，说明载体的抗水热能力增强，催化剂结构更稳定，催化剂的活性稳定性相应增加。
採用併流沉澱法製備瞭不同配比的ZrO2-Al2O3複閤氧化物，併通過浸漬法製備瞭10% Ni/ZrO2-Al2O3催化劑，攷察瞭複閤氧化物載體的水熱穩定性及ZrO2與Al2O3的配比對閤成氣製甲烷Ni基催化劑性能的影響。研究結果錶明：ZrO2的添加能在一定程度上抑製Al2O3的水解反應，這可能是ZrO2與Al2O3形成固溶體所緻。隨著ZrO2含量增加，複閤氧化物載體的水熱穩定性先降低後升高，噹ZrO2與Al2O3質量比為0.24時，載體的水熱穩定性最好。不同配比的ZrO2-Al2O3複閤氧化物負載Ni基催化劑的穩定性與載體的水熱穩定性變化是一緻的，說明載體的抗水熱能力增彊，催化劑結構更穩定，催化劑的活性穩定性相應增加。
채용병류침정법제비료불동배비적ZrO2-Al2O3복합양화물，병통과침지법제비료10% Ni/ZrO2-Al2O3최화제，고찰료복합양화물재체적수열은정성급ZrO2여Al2O3적배비대합성기제갑완Ni기최화제성능적영향。연구결과표명：ZrO2적첨가능재일정정도상억제Al2O3적수해반응，저가능시ZrO2여Al2O3형성고용체소치。수착ZrO2함량증가，복합양화물재체적수열은정성선강저후승고，당ZrO2여Al2O3질량비위0.24시，재체적수열은정성최호。불동배비적ZrO2-Al2O3복합양화물부재Ni기최화제적은정성여재체적수열은정성변화시일치적，설명재체적항수열능력증강，최화제결구경은정，최화제적활성은정성상응증가。
A series of ZrO2-Al2O3 composites supports with different ZrO2 content were prepared by co-precipitation method. Supported nickel catalysts were prepared by impregnation. The effect of the weight ratio of ZrO2 to Al2O3 on the hydrothermal of ZrO2-Al2O3 mixed composites were tested by XRD. The results showed the hydrothermal stability of ZrO2-Al2O3was better than pure Al2O3 and when the weight ratio of ZrO2 to Al2O3 was 0.24, it had optimal hydrothermal stability. The properties of Ni catalyst for carbon monoxide methanation was investigated at 350℃in atmospheric pressure, the results showed the stability time of cata-lyst was the function of the hydrothermal stability of ZrO2-Al2O3 support.
