催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (3): 495-501.DOI: 10.3724/SP.J.1088.2011.01128

• 研究论文 • 上一篇    下一篇

Ru 和 Cu 助剂对费托合成 Fe 基催化剂反应性能的影响

王立丽 1,2, 吴宝山 1, 李永旺 1   

  1. 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中国科学院研究生院, 北京 100049
  • 收稿日期:2010-11-14 修回日期:2010-12-29 出版日期:2011-03-04 发布日期:2014-08-01

Effects of Ru and Cu Promoters on Fischer-Tropsch Synthesis over Fe-Based Catalysts

WANG Lili1,2, WU Baoshan1,*, LI Yongwang1   

  1. 1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-11-14 Revised:2010-12-29 Online:2011-03-04 Published:2014-08-01

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938

被引次数

19

摘要： 研究了 Ru 和 Cu 助剂对无 K 的费托 (F-T) 合成 Fe 基催化剂的织构性质、物相结构、还原和碳化行为的影响. 在 n(H2)/n(CO) = 2.0, t = 260 oC, p = 1.5 MPa 和 GHSV = 2000 h-1的条件下, 采用固定床反应器考察了 Ru, Cu 助剂对 Fe 基催化剂费托合成反应性能的影响. 采用低温 N2 物理吸附、X 射线衍射、穆斯堡尔谱和程序升温还原技术对催化剂进行了详细表征. 结果发现, Ru 或 Cu 的添加均提高了铁氧化物的分散度, 不同程度地促进了催化剂的还原和碳化, Cu 的作用更为显著. 反应结果表明, Ru 或 Cu 的添加均提高了催化剂上 F-T 合成反应活性, 其中 Cu 的添加降低了 CH4 选择性, 促进了 C5+的生成; 而 Ru 的作用则相反.

Abstract: The effects of Ru and Cu promoters on the textural properties, phase composition, reduction and carburization behavior, and catalytic performance of Fe-based Fischer-Tropsch synthesis (FTS) catalysts without K promoter were investigated. The catalysts were characterized by N2 physical adsorption, X-ray diffraction, H2 and CO temperature-programmed reduction, Mössbauer effect spectroscopy. The FTS performance of the catalysts was tested in a fixed-bed reactor under the conditions of n(H2)/n(CO) = 2.0, t = 260 oC, p = 1.5 MPa and GHSV = 2000 h-1. The results indicated that both Ru and Cu enhance the dispersion of iron oxides and facilitate the reduction and carburization of the catalysts, which was more obvious for the Cu promoter. Ru and Cu both increase the activity of the catalysts to some extent. Besides, the Cu promoter increased the C5+ selectivity and hindered the CH4 formation while Ru exhibited the opposite trend.

Key words: Fischer-Tropsch synthesis, ruthenium, copper, promoter, iron-based catalyst, fixed-bed reactor