摘要
采用共沉淀法制备了氧化铝负载的钴基催化剂,并通过等体积浸渍法添加了不同的金属助剂(Pt、Ru、Zr)。使用氮气物理吸脱附、XRD、H_(2)-TPR、CO-TPD、XRF等分析方法对催化剂进行了表征;在216℃、2.5 MPa、1000 h^(-1)、V(H_(2))/V(CO)=2的反应条件下,采用固定床评价装置研究了Pt、Ru、Zr助剂对催化剂费托合成反应性能的影响。结果表明,Pt、Ru和Zr助剂的添加均提高了钴物种的分散度,且Pt和Ru不同程度地改善了催化剂的还原性能;Pt助剂的添加显著提高了反应过程中CO的转化率、C^(+)_(5)烃类选择性,而Ru、Zr助剂的添加提高了产物烯烷比和C_(5)~C_(12)烃的选择性。
Alumina supported cobalt-based catalysts for Fischer-Tropsch synthesis are prepared via a precipitation method,and coated by Pt,Ru and Zr promoters,respectively through incipient wetness impregnation method.The catalysts are characterized by mean of N_(2)physical adsorption and desorption,XRD,H_(2)-TPR,CO-TPD,XRF and other analytical methods.The influences of Pt,Ru and Zr promoters on the catalytic performance of the catalysts in Fischer-Tropsch synthesis are evaluated in a fixed-bed reactor under the conditions of 216℃,2.5 MPa,1000 h^(-1)and V(H_(2))/V(CO)=2.Results indicate that all the three promoters enhance the dispersion of cobalt species in the catalysts.Both Pt and Ru facilitate the reduction performance of the catalysts,and the addition of Pt improves the conversion of CO and the selectivity of C^(+)_(5)hydrocarbons.The addition of Ru or Zr increases the ratio of olefin to paraffin in the product and the selectivity of C_(5)-C_(12)hydrocarbons.
作者
孟闪茹
娄舒洁
闫敬如
肖海成
刘克峰
MENG Shan-ru;LOU Shu-jie;YAN Jing-ru;XIAO Hai-cheng;LIU Ke-feng(PetroChina Petrochemical Research Institute,Beijing 102206,China;College of Chemical Engineering and Environment,China University of Petroleum-Beijing,Beijing 102249,China)
出处
《现代化工》
CAS
CSCD
北大核心
2023年第S01期108-113,共6页
Modern Chemical Industry
基金
国家重点研发计划(2017YFA0700102)
中国石油创新基金(2020A-2412)
关键词
费托合成
钴基催化剂
助剂
铂
钌
锆
Fischer-Tropsch synthesis
cobalt-based catalyst
promoter
platinum
ruthenium
zirconium
