effectsofniparticlesizeonaminationofmonoethanolamineoverniresio2catalysts

	effectsofniparticlesizeonaminationofmonoethanolamineoverniresio2catalysts
	Ma Lei 2; Yan Li 2; Lu Anhui 1; Ding Yunjie 2
刊名	催化学报
	2019-01-01
卷号	40 期号:4 页码:567
ISSN号	0253-9837
英文摘要	Ni-Re/SiO_2 catalysts with controllable Ni particle sizes (4.5–18.0 nm) were synthesized to investigate the effects of the particle size on the amination of monoethanolamine (MEA). The catalysts were characterized by various techniques and evaluated for the amination reaction in a trickle bed reactor at 170 °C, 8.0 MPa, and 0.5 h~(-1) liquid hourly space velocity of MEA (LHSVMEA) in NH_3/H_2 atmosphere. The Ni-Re/SiO_2 catalyst with the lowest Ni particle size (4.5 nm) exhibited the highest yield (66.4%) of the desired amines (ethylenediamine (EDA) and piperazine (PIP)). The results of the analysis show that the turnover frequency of MEA increased slightly (from 193 to 253 h~(-1)) as the Ni particle sizes of the Ni-Re/SiO_2 catalysts increased from 4.5 to 18.0 nm. Moreover, the product distribution could be adjusted by varying the Ni particle size. The ratio of primary to secondary amines increased from 1.0 to 2.0 upon increasing the Ni particle size from 4.5 to 18.0 nm. Further analyses reveal that the Ni particle size influenced the electronic properties of surface Ni, which in turn affected the adsorption of MEA and the reaction pathway of MEA amination. Compared to those of small Ni particles, large particles possessed a higher proportion of high-coordinated terrace Ni sites and a higher surface electron density, which favored the amination of MEA and NH_3 to form EDA.
语种	英语
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/178636]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.大连理工大学 2.中国科学院大连化学物理研究所
推荐引用方式 GB/T 7714	Ma Lei,Yan Li,Lu Anhui,et al. effectsofniparticlesizeonaminationofmonoethanolamineoverniresio2catalysts[J]. 催化学报,2019,40(4):567.
APA	Ma Lei,Yan Li,Lu Anhui,&Ding Yunjie.(2019).effectsofniparticlesizeonaminationofmonoethanolamineoverniresio2catalysts.催化学报,40(4),567.
MLA	Ma Lei,et al."effectsofniparticlesizeonaminationofmonoethanolamineoverniresio2catalysts".催化学报 40.4(2019):567.