Ind. Eng. Chem. Res. 2001, 40, 5705-5709
5705
MATERIALS AND INTERFACES Structural Behavior of Rice Husk Silica in Pressurized Hot-Water Treatment Processes Kazuhiro Mochidzuki,*,† Akiyoshi Sakoda,† Motoyuki Suzuki,† Jun Izumi,‡ and Nariyuki Tomonaga‡ Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan, and Nagasaki R & D Center, Mitsubishi Heavy Industries, Ltd., 5-717-1 Fukahori-machi, Nagasaki 851-0392, Japan
This paper deals with X-ray fluorescence (XRF), X-ray diffraction (XRD), and 29Si nuclear magnetic resonance (29Si NMR) measurements of rice husk silica treated under hydrothermal conditions in autoclave and steam-explosion processes. An understanding of the structural behavior of rice husk silica provides insight into its prospective opportunities for industrial applications. The results show that the hydrothermal reaction hardly affected the local silicate structures within the temperature range tested,
