CAJ | 학술논문

以γ-Al2 O3为原料制备 Ni-γ-Al2 O3、Zn-γ-Al2 O3和 Al2 O3载体，并采用等容浸渍法制备了钴基费-托合成用催化剂。结果表明：高温焙烧使氧化铝晶型和孔结构发生较大变化；镍添加后在载体表面形成高分散的氧化镍物种；而锌添加后与载体发生反应生成了铝酸锌；负载型催化剂中，四氧化三钴粒径大小主要取决于载体孔结构。CoPt/γ-Al2 O3、CoPt/Zn-γ-Al2 O3、CoPt/Ni-γ-Al2 O3具有相近的费-托合成催化性能，而CoPt/Al2 O3呈现出最高的催化活性和最低的甲烷选择性。表明，钴物种粒径和载体结构是影响催化剂费-托合成催化性能的主要因素。
이γ-Al2 O3위원료제비 Ni-γ-Al2 O3、Zn-γ-Al2 O3화 Al2 O3재체，병채용등용침지법제비료고기비-탁합성용최화제。결과표명：고온배소사양화려정형화공결구발생교대변화；얼첨가후재재체표면형성고분산적양화얼물충；이자첨가후여재체발생반응생성료려산자；부재형최화제중，사양화삼고립경대소주요취결우재체공결구。CoPt/γ-Al2 O3、CoPt/Zn-γ-Al2 O3、CoPt/Ni-γ-Al2 O3구유상근적비-탁합성최화성능，이CoPt/Al2 O3정현출최고적최화활성화최저적갑완선택성。표명，고물충립경화재체결구시영향최화제비-탁합성최화성능적주요인소。
Three materials (Ni-γ-Al2 O3 ,Zn-γ-Al2 O3 and Al2 O3 )were prepared fromγ-Al2 O3 and used as supports for cobalt-based Fischer-Tropsch catalysts.Addition of Ni toγ-Al2 O3 resulted in highly dispersed NiO,while addition of ZnO led to the formation of ZnAl2 O4 .In the supported catalysts,cobalt particle size was mostly determined by support pore structure.It was found that CoPt/γ-Al2 O3 ,CoPt/Zn-γ-Al2 O3 and CoPt/Ni-γ-Al2 O3 possessed comparable catalytic performance,while CoPt/Al2 O3 exhibited the highest catalytic activity and the lowest CH4 selectivity,which confirmed that support texture and cobalt particle size seem to be major catalyst parameters affecting the catalytic performance of the final catalysts.