24小时热门版块排行榜

返回列表

NPCA研究中心

银虫 (初入文坛)

应助: 0 (幼儿园)
金币: 871.2
红花: 3
帖子: 40
在线: 32.4小时
虫号: 3290608
注册: 2014-06-24
性别: MM
专业: 碳素材料与超硬材料

[交流] 评估铂-碳气凝胶作为催化剂和氧化催化剂的性能

Removing aromatic and oxygenated VOCs from polluted air stream using Pt–carbon aerogels: Assessment of their performance as adsorbents and combustion catalysts，Journal of Hazardous Materials 194 (2011) 216–222. 影响因子：4.331
摘要：Two series of Pt-catalysts were prepared by impregnation or doping of carbon aerogels and different porous textures and Pt-dispersion were obtained. The performance of the samples in the elimination of organic compounds (VOCs) by adsorption and catalytic combustion was studied and compared with the characteristics of both the VOCs and the catalysts and the interactions between them. Toluene, xylenes and acetone were selected as representative aromatic or oxygenated VOCs. The adsorption of VOCs is favoured at roomtemperature in the case ofmeso/microporousmaterials, but at the higher catalytic reaction temperature, themicropores volume ismore important. Adsorption and catalytic combustion occur simultaneously, and are both dependent on temperature, albeit in opposite directions. The combustion of aromatic compounds takes place at a lower temperature than that required for acetone combustion, so favouring the accumulation of adsorbed VOC, something that should be avoided to minimize risks. Catalytic performance improves with the contact time and is independent of oxygen content above 5%v/v, but declines signiﬁcantly below this limit.
中文翻译摘要：通过浸渍或掺杂碳气凝胶制备了两种系列的Pt催化剂，并且获得了不同孔结构和Pt分散的试样。研究了试样通过吸附和催化氧化去除有机化合物的性能，并且与VOC和催化剂以及它们之间的关系相比较。选择甲苯、二甲苯和丙酮作为典型的芳香族和VOC。在室温条件下，中孔/微孔材料对VOC的吸附是有效的，但是在高的催化反应温度下，微孔量显得更为重要。吸附和催化氧化同时发生，并且都依赖于温度，即使在不同的方向。芳香族化合物的氧化在比较低的温度下发生与丙酮的氧化相比，因此有利于吸附了的VOC积累，有时应该避免来防范风险。催化性能随接触时间提高，不依赖于氧气含量高于5%V/V时，但是低于这个界限显著下降。
想获得更多资源可点击链接http://www.tjdrfk.com/news

5.jpg

1.jpg

2.jpg

3.jpg

4.jpg

[ Last edited by qixingzhen on 2014-10-30 at 16:28 ]

回复此楼

» 本帖附件资源列表

欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com
附件 1 : 用铂-碳气凝胶从污染的空气流中去除芳香族和氧化的VOC：评估它们作为催化剂和氧化催化剂的性能.pdf

2014-10-30 16:23:29, 410.26 K