Extension of catalyst lifetime by doping of Ce in Ni-loaded acid-washed Shengli lignite char for biomass catalytic gasification,Catalysis Science & Technology

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Extension of catalyst lifetime by doping of Ce in Ni-loaded acid-washed Shengli lignite char for biomass catalytic gasification
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2017-10-23 00:00:00 , DOI: 10.1039/c7cy01670k
Jie Ren _{1,

2,

3,

4} , Jing-Pei Cao _{1,

2,

3,

4} , Xiao-Yan Zhao _{1,

2,

3,

4} , Fu Wei _{1,

2,

3,

4} , Chen Zhu _{1,

2,

3,

4} , Xian-Yong Wei _{1,

2,

3,

4}

Affiliation

Cerium (Ce)-doped nickel (Ni)-based catalysts supported on modified lignite with HCl were prepared by a co-impregnation method with different Ni/Ce ratios (xNi-Ce/AWSL, where x is 1, 10, 20, 50, and 100, and AWSL is acid-washed Shengli lignite). The promotion effect of Ce with different Ni/Ce weight ratios on structural properties and activity under different atmospheres was investigated in detail. All catalysts were characterized by X-ray diffraction, scanning electron microscopy-energy dispersive spectroscopy, transmission electron microscopy, and N₂ physisorption apparatus. The performance of catalysts was evaluated in a well-designed reactor system for biomass catalytic gasification (BCG). The results indicated that the active component of Ni was dispersed uniformly, and that a high and stable gas yield was obtained over Ce-doped catalysts. Due to the formation of a Ni–Ce alloy, the Ce-doped catalyst with a Ni/Ce weight ratio of 50 : 1 showed the most stable gas yield (69.1%). After carrying out BCG five times, the lowest carbon deposition (weight increase of 1.7%) was obtained under an Ar atmosphere. Spent 50Ni–Ce/AWSL catalyst showed the least carbon deposition, and had the lowest Ni crystallite size (17.3 nm) and smallest average pore size (2.86 nm). The maximum catalytic activity and highest stability for BCG was observed for the catalyst with a Ni/Ce ratio of 50, which showed the best inhibition of carbon deposition.

中文翻译：

掺镍的酸洗胜利里褐煤焦炭中铈的掺入可延长催化剂寿命，用于生物质催化气化

通过共浸渍法以不同的Ni / Ce比（x Ni-Ce / AWSL，其中x为1，10，20 ， 50和100，而AWSL是酸洗的胜利褐煤）。详细研究了不同Ni / Ce重量比的Ce在不同气氛下对结构性能和活性的促进作用。通过X射线衍射，扫描电子显微镜-能量分散光谱，透射电子显微镜和N ₂表征所有催化剂。物理吸附仪器。在精心设计的用于生物质催化气化（BCG）的反应器系统中评估了催化剂的性能。结果表明，Ni的活性组分均匀分散，并且在Ce掺杂的催化剂上获得了高且稳定的气体产率。由于形成了Ni-Ce合金，Ni / Ce重量比为50：1的Ce掺杂催化剂显示出最稳定的气体收率（69.1％）。进行5次BCG后，在Ar气氛下获得最低的碳沉积（重量增加1.7％）。用过的50Ni–Ce / AWSL催化剂显示出最少的碳沉积，并且具有最低的镍微晶尺寸（17.3 nm）和最小的平均孔径（2.86 nm）。Ni / Ce比为50的催化剂观察到BCG的最大催化活性和最高稳定性，

更新日期：2017-11-06

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