The catalytic combustion of various organic compounds has been investigated over noble and non-noble metal catalysts using a fixed bed. It was concluded that the activity order of different organic compounds on a noble metal catalyst is toluene > 2-butanone > benzene > n-heptane = isopropyl alcohol > acrylonitrile > cyclohexane. On non-noble metal catalyst, it is isopropyl alcohol > 2obutanone > acrylonitrile > toluene> n-neptune > cyclohexane > benzene. In order to compare the thermal stability of catalysts, the catalytic reaction of toluene has been studied over noble and non-noble metal catalysts which were calcined at various temperatures up to 900~ for 3 h.

Six kinds of materials, including two types of nanoclays, were added into drilling fluids for being substitutes of common bentonite. Swelling properties and yield of these clays were determined. Rheology, filtration property and properties at high temperature of drilling fluids prepared by the six kinds of clays respectly were also evaluated in laboratory. The results indicate that the nanobentonite modified by intercalated polymerization can improve various properties of drilling fluids. Besides, sepiolites in Xiangtan, Hunan province and in Nanyang, Henan province are also excellent materials for preparing drilling fluids.