用浸渍法制备了V2 O5/SiO2 、P K V/SiO2 、Cr K V/SiO2 、Mo K V /SiO2 和Fe K V/SiO2 几种固体样品 ,作为环己烷的催化裂化、氧化反应的催化剂。研究表明在V2 O5/SiO2上添加某些助剂后 ,使其脱氢、供氢、供氧中心得到改善 ,明显地抑...用浸渍法制备了V2 O5/SiO2 、P K V/SiO2 、Cr K V/SiO2 、Mo K V /SiO2 和Fe K V/SiO2 几种固体样品 ,作为环己烷的催化裂化、氧化反应的催化剂。研究表明在V2 O5/SiO2上添加某些助剂后 ,使其脱氢、供氢、供氧中心得到改善 ,明显地抑制了深度裂解与氧化作用。Cr K V/SiO2 和Fe K V/SiO2 表面具有较强的脱氢中心和较弱的供氧中心 ,组成了适应于环己烷的部分裂化、氧化的活性中心 ,表现出较好的催化活性。展开更多
Using a special Painleve-Baecklund transformation as well as the extended mapping approach and the linear superposition theorem, we obtain new families of variable separation solutions to the （2＋1）-dimensional gene...Using a special Painleve-Baecklund transformation as well as the extended mapping approach and the linear superposition theorem, we obtain new families of variable separation solutions to the （2＋1）-dimensional generalized Broer-Kaup （GBK） system. Based on the derived exact solution, we reveal some novel evolutional behaviors of localized excitations, i.e. fission and fusion phenomena in the （2＋1）-dimensional GBK system.展开更多
文摘用浸渍法制备了V2 O5/SiO2 、P K V/SiO2 、Cr K V/SiO2 、Mo K V /SiO2 和Fe K V/SiO2 几种固体样品 ,作为环己烷的催化裂化、氧化反应的催化剂。研究表明在V2 O5/SiO2上添加某些助剂后 ,使其脱氢、供氢、供氧中心得到改善 ,明显地抑制了深度裂解与氧化作用。Cr K V/SiO2 和Fe K V/SiO2 表面具有较强的脱氢中心和较弱的供氧中心 ,组成了适应于环己烷的部分裂化、氧化的活性中心 ,表现出较好的催化活性。
基金The project supported by the Natural Science Foundation of Zhejiang Province of China under Grant No. Y604106, the Foundation of ＂New Century 151 Talent Engineering＂ of Zhejiang Province, and the Key Academic Discipline Foundation of Zhejiang Province .The authors would like to thank Profs. J.F. Zhang, L.Q. Chen, and J.P. Fang for their fruitful discussions.
文摘Using a special Painleve-Baecklund transformation as well as the extended mapping approach and the linear superposition theorem, we obtain new families of variable separation solutions to the （2＋1）-dimensional generalized Broer-Kaup （GBK） system. Based on the derived exact solution, we reveal some novel evolutional behaviors of localized excitations, i.e. fission and fusion phenomena in the （2＋1）-dimensional GBK system.
