不同金属氧化物对钴基费托合成催化剂性能的影响  

Study on the effect of different metal oxides on the performance of cobalt-based Fischer-Tropsch catalysts

作　　者：李博翔 王俊刚[1] 王强 张伟[1] 刘岩[1] 马占骋[1] 马中义[1] 侯博[1] LI Bo-xiang;WANG Jun-gang;WANG Qiang;ZHANG Wei;LIU Yan;MA Zhan-cheng;MA Zhong-yi;HOU Bo(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报（中英文）》2023年第10期1411-1420,共10页Journal of Fuel Chemistry and Technology

基　　金：山西省基础研究计划(202103021224444);中央引导地方科技发展资金(YDZJSX2021C041);国家自然科学基金(22179136,22279155,22279156)资助。

摘　　要：本实验在六方纳米片状的Co_(3)O_(4)(NMS-Co)上分别负载了1%含量的ZrO_(2)、Al_(2)O_(3)和MnO_(2)三种金属氧化物,制备反相催化剂模型,研究金属氧化物对钴基催化剂费托合成性能的影响。通过H_(2)-TPD、CO-TPD以及催化剂性能评价结果发现,ZrO_(2)和Al_(2)O_(3)能够显著增加NMS-Co催化剂的活性位点,在相同转化率条件下,反应温度从230℃分别降低至170、180℃,重质烃生成速率分别提升2.5、2倍,CH_(4)选择性从37.8%分别降低至3.6%、12.0%。然而,MnO_(2)使得NMS-Co催化剂CO转化率仅从30.9%增加到45.5%,CH_(4)选择性降低至16.5%。In this paper,three metal oxides,ZrO_(2),Al_(2)O_(3)and MnO_(2),loaded with 1%content on hexagonal nanosheets of Co_(3)O_(4)(NMS-Co),respectively,were prepared as reversed-phase catalyst models to investigate the effects of metal oxides on the performance of cobalt-based catalysts for Fischer-Tropsch synthesis.The results of H_(2)-TPD,CO-TPD and catalyst performance evaluation revealed that ZrO_(2)and Al_(2)O_(3)could significantly increase the active sites of NMS-Co catalysts,lower the reaction temperature from 230℃to 170 and 180℃,respectively,and increase the heavy hydrocarbon generation rate by 2.5 and 2 times,respectively,under the same conversion conditions.The CH_(4)selectivity was reduced from 37.8%to 3.6%and 12.0%,respectively.However,MnO_(2)increased the CO conversion only from 30.9%to 45.5%and decreased the CH_(4)selectivity to 16.5%.A new idea is proposed to investigate the effect of metal oxides on the performance of cobalt-based Fischer-Tropsch catalysts.

关 键 词：反相催化剂 Co_(3)O_(4) 金属氧化物 

分 类 号：O643[理学—物理化学]