FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

被引：76

作者：

Yang, Zhiqiang ^{[1
]}

Pan, Xiulian ^{[1
]}

Wang, Junhu ^{[2
]}

Bao, Xinhe ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China

来源：

CATALYSIS TODAY | 2012年 / 186卷 / 01期

关键词：

CO hydrogenation; Carbon nanotubes; Confined iron nitride nanoparticles; Mn promotion; K promotion; FISCHER-TROPSCH SYNTHESIS; CARBON-MONOXIDE CATALYSTS; IRON-MANGANESE CATALYST; CO HYDROGENATION; ELECTRONIC-STRUCTURE; POTASSIUM; NITRIDE; CHEMISORPTION; NANOTUBES; ALKENES;

D O I：

10.1016/j.cattod.2011.11.034

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effects of manganese and potassium on the structural and morphological properties, phase compositions and CO adsorption behavior of the CNT-confined FeN catalyst were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fe-57 Mossbauer effect spectroscopy (MES) and CO temperature-programmed desorption (TPD). The results suggested that the presence of manganese helps retain nitrogen in cubic FeCxN1-x and facilitates CO adsorption. The selectivity to (C2C4=)-C-= light olefins is enhanced over Mn(1.0 wt%)/FeN/CNT although the activity decreases within the loading range of 0.5-2.0 wt% for Mn. Although further promotion with K could improve the activity slightly, the selectivity to light olefins decreases. At the same time, the addition of potassium enhanced the water gas shift activity and shifted the selectivity to heavy hydrocarbons (C5+), similar to the conventional reduced iron catalysts. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：121 / 127

页数：7

共 37 条

[1] CHEMISORPTION OF GASES ON A PROMOTED IRON CATALYST .1. HYDROGEN, NITROGEN, CARBON-MONOXIDE AND CARBON-DIOXIDE [J].