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penguin1987

银虫 (小有名气)

[求助] 磷钨酸NH3-TPD表征条件

RT,有哪位虫友侧过磷钨酸的NH3-PD,文献上说不同温度焙烧的磷钨酸含水量不同,导致它们的酸性不一样,请问有谁测过负载型磷钨酸不同焙烧温度的NH3-TPD,具体的NH3-TPD测试条件怎样的?需要详细的,预处理温度,时间,吸附NH3温度,时间,次数,NH3流量多少,怎么吹扫等等。。。
我想测焙烧温度为110,200,300℃的负载磷钨酸的酸强度。
跪求高人指点!!!
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jiangkedong

金虫 (正式写手)

引用回帖:
2楼: Originally posted by zyhou at 2011-12-12 08:00:31:
我做过一点,与普通的NH3-TPD一样,用传统的TCD检测需要先干燥脱水、再用TCD检测。
Applied Catalysis A: General, Volume 352, Issues 1-2, 15 January 2009, Pages 259-264
Journal of Molecular Catalysis A ...

侯老师,您的工作确实非常系统呀,赞一个。另外您要考一下,多酸化合物在500 ℃时发生分解,同时产生水分子,会影响产物的NH3的归属。其一可以采用冷肼冷却后即可归属酸量又可使水跑掉。另外就是只能连接质谱啦。
3楼2011-12-12 09:23:51
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zyhou

专家顾问 (文坛精英)

【答案】应助回帖

感谢参与,应助指数 +1
我做过一点,与普通的NH3-TPD一样,用传统的TCD检测需要先干燥脱水、再用TCD检测。
Applied Catalysis A: General, Volume 352, Issues 1-2, 15 January 2009, Pages 259-264
Journal of Molecular Catalysis A: Chemical, Volume 243, Issue 2, 16 January 2006, Pages 233-238
Applied Catalysis B: Environmental, Volume 101, Issues 3-4, 14 January 2011, Pages 431-440
Applied Catalysis A: General, Volume 304, 10 May 2006, Pages 49-54
Fuel, Volume 86, Issues 17-18, December 2007, Pages 2707-2713
2楼2011-12-12 08:00:31
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