نتایج جستجو برای: vapour phase
تعداد نتایج: 606226 فیلتر نتایج به سال:
The applications of supported metal catalysts vary widely, from selective hydrogenation in the fine chemicals industry to the control of vehicle emissions. Yet many basic questions about the structure, activity, and durability of these catalysts remain unanswered. For example, there is still much uncertainty about the mechanism of metal particle growth, or sintering, which is a major cause of c...
Reducing contamination level is of primary importance for the safety and efficiency of a MOCVD process. Off-line fault identification is one of the basic tasks that must be performed in hazard analysis to identify potential operational problems. For illustration convenience, the scope of present study is limited to the purge-gas purifier of the process. A systematic step-by-step procedure is pr...
A heterogeneous olefin epoxidation catalyst containing both V and Ti in the active site was prepared by sequential non-hydrolytic grafting. The silica was exposed first to VO(OPr)3 vapor followed by Ti(O Pr)4 vapor. Formation of propene is evidence for the creation of Ti-O-V linkages on the surface. Upon metathesis of the 2-propoxide ligands with BuOOH, the catalyst becomes active for the gas p...
Pen-Hsiu Chang , N.C. Chen, Chin-An Chang1, Hsian-Chu Peng, Chuang-Feng Shih, KuoShung Liu, Shih-Kai Lin, Kun-Ta Wu, Shang-Chia Chen, Chao-Ping Huang, Hong-Syuan Wang, Pu-Tai Yang, C.-T. Liang, Y.H. Chang and Y.F. Chen Institute of Electro-Optical Engineering, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan Department of Materials Science and Engineering, National Tsing Hua University, H...
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