The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
In situ calcinations of the precursor of mesostructural aluminophosphate molecular sieves
Author(s): 
Pages: 41-44
Year: Issue:  3
Journal: TRANSACTIONS OF MATERIALS AND HEAT TREATMENT

Keyword:  焙烧前驱体原位介孔AlPO4分子筛;
Abstract: 采用热重(TGA)-差热(DTA)、原位X射线衍射(XRD)、原位红外光谱(FT-IR)和扫描电镜(SEM),对介孔 AlPO4分子筛前驱体焙烧过程中的多种变化进行实验研究.TGA-DTA和原位FT-IR结果表明,前驱体脱除主要分为两步:模版剂中N-H键首先断裂,然后甲基(CH3)和亚甲基(CH2)被氧化除去;从原位XRD分析结果可以看出,焙烧过程受温度的影响表现为结晶度的变化,当焙烧温度超过650℃时,AlPO4分子筛会转化成磷石英相和无定形相;SEM照片清楚表明,焙烧使无定型的前驱体转化成柱状分子筛.另外升温速率高于10℃·min-1,会造成分子筛颗粒破碎.
Related Articles
No related articles found