Thông tin chung


  Đề tài NC khoa học
  Bài báo, báo cáo khoa học
  Hướng dẫn Sau đại học
  Sách và giáo trình
  Các học phần và môn giảng dạy
  Giải thưởng khoa học, Phát minh, sáng chế
  Khen thưởng
  Thông tin khác

  Tài liệu tham khảo

  Hiệu chỉnh

Số người truy cập: 75,104,053

 Catalytic performance of MoVTeNbO catalyst supported on SiC foam in oxidative dehydrogenation of ethane and ammoxidation of propane.
abortion stories gone wrong read teenage abortion facts
Tác giả hoặc Nhóm tác giả: T.T. Nguyen, L. Burel, D.L. Nguyen, C. Pham-Huu, J.M.M. Millet
cvs weekly sale prescription savings cards
Nơi đăng: Applied Catalysis A: General; Số: Volumes 433–434;Từ->đến trang: 41 - 48;Năm: 2012
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế

MoVTeNbO catalysts have been supported on pre-oxidized SiC foam by dip coating from slurry containing the precursors for all constituents and tested as catalysts for the oxidative dehydrogenation of ethane and the ammoxidation of propane. The characterization of the coating obtained by different techniques showed that a one layer coating contained almost no active M1 phase and mainly M2 phase whereas a two layers coating presented a significant amount of M1 phase. The structured catalyst thus obtained with two layers appeared highly efficient and stable in both reactions between 380 and 420 °C and the oxide coating exhibited fairly good mechanical properties. When compared to the most efficient powdered pure M1 phase in the case of ethane oxidative dehydrogenation and M1 + M2 phase mixture in the case of propane ammoxidation, the coated foam appeared less active; the reduced activity was attributed to the lower content in M1 phase of the supported catalyst. The selectivity to ethylene was lower, that to acrylonitrile was comparable; the decrease in ethylene selectivity was due to the presence of other active but not selective phases like TeMo5O15 and Mo0.97V0.95O5. In the case of acrylonitrile the synergy effect that takes place between the M1 and M2 phases also took place between the Mo0.97V0.95O5 phase and the M2 phase and maintained the selectivity to acrylonitrile. Improvements in preparation conditions are still possible to open the door to intensification and miniaturization on the process of propane ammoxidation on these efficient coated SiC foam structured reactors
© Đại học Đà Nẵng
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: