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华东理工大学工业催化研究所,上海 200237
Received:02 October 2018,
Revised:2018-11-01,
Online First:24 July 2026,
Published:05 March 2019
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唐铨, 郭杨龙, 詹望成, 郭耘, 王丽, 王筠松. 用于丙烷催化燃烧的PdxPty-ZSM-5/Cordierite整体式催化剂[J]. 化工学报, 2019, 70(3): 944-950 DOI: 10.11949/j.issn.0438-1157.20181110.
TANG Quan, GUO Yanglong, ZHAN Wangcheng, GUO Yun, WANG Li, WANG Yunsong. Catalytic combustion of propane over PdxPty-ZSM-5/Cordierite monolithic catalyst[J]. CIESC Journal, 2019, 70(3): 944-950 DOI: 10.11949/j.issn.0438-1157.20181110.
唐铨, 郭杨龙, 詹望成, 郭耘, 王丽, 王筠松. 用于丙烷催化燃烧的PdxPty-ZSM-5/Cordierite整体式催化剂[J]. 化工学报, 2019, 70(3): 944-950 DOI: 10.11949/j.issn.0438-1157.20181110. DOI:
TANG Quan, GUO Yanglong, ZHAN Wangcheng, GUO Yun, WANG Li, WANG Yunsong. Catalytic combustion of propane over PdxPty-ZSM-5/Cordierite monolithic catalyst[J]. CIESC Journal, 2019, 70(3): 944-950 DOI: 10.11949/j.issn.0438-1157.20181110. DOI:
以ZSM-5分子筛、铝溶胶、硝酸钯、硝酸铂和水为原料制备分子筛浆料,采用真空抽提-一次涂覆法在堇青石蜂窝陶瓷载体表面制备出Pd
x
Pt
y
-ZSM-5/Cordierite整体式催化剂,考察了Pd负载量、ZSM-5分子筛的硅铝比和Pd/Pt质量比对整体式催化剂的丙烷催化燃烧性能的影响,并用超声波振荡、SEM、XRD、H
2
-TPR和C
3
H
8
-TPD等手段对整体式催化剂进行了表征。当球磨时间为60 min,分子筛浆料固含量为38%时,整体式催化剂的涂层上载量可达到178 g‧L
-1
,涂层脱落率低于0.5%。Pd
2
Pt
3
-ZSM-5/Cordierite整体式催化剂(贵金属总负载量为1.2 g‧L
-1
)对于丙烷的催化燃烧具有较好的催化活性(
T
50
=259℃,
T
90
=323℃)和稳定性,具有良好的工业应用前景,其中较低的ZSM-5分子筛硅铝比以及Pd和Pt之间的相互作用增加了对丙烷的吸附能力和表面活性氧物种的数量,从而提高了整体式催化剂的催化活性。
Pd
x
Pt
y
-ZSM-5/Cordierite monolithic catalysts were prepared on the
surface of the cordierite honeycomb supports
via
vacuum extraction and one coating method
in which ZSM-5 molecular sieve
alumina sol
platinum or palladium nitrates and water were used as raw materials to prepare molecular sieve slurry. Effects of Pd loading
Si/Al ratio of ZSM-5
the mass ratio of Pd/Pt on the catalytic performance of the monolithic catalysts for the catalytic combustion of propane were investigated. The monolithic catalysts were characterized by ultrasonic oscillation
SEM
XRD
H
2
-TPR and C
3
H
8
-TPD. When the ball milling time is 60 min and the molecular sieve slurry solid content is 38%
the coating amount of the monolith catalyst can reach 178 g‧L
-1
and the coating detachment rate is less than 0.5%. Pd
2
Pt
3
-ZSM-5/Cordierite catalyst (total loading of noble metals of 1.2 g‧L
-1
) exhibits better catalytic activity and stability (
T
50
=259℃
T
90
=323℃) for the catalytic combustion of propane
which has better industrial application prospect. Lower Si/Al ratio of ZSM-5 and the interaction between Pd and Pt increase the amounts of adsorbed propane and surface active oxygen species
thus increases the catalytic performance of the monolithic catalyst.
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