Preparation of Iron-Based Catalysts by Mechanical Solid-Phase Ball Milling and Their Applications in Cohydrogenation of Coal and Petrochemical Coking Residual Oil.

Catalysts are an important factor in reducing harsh reaction conditions and increasing oil yields for the cohydrogenation of coal-oil. In this article, nano-iron-based catalysts have been prepared by mechanical solid-phase ball milling with FeCl3·6H2O, Fe(NO3)3·9H2O, and ammonium carbonate as reactants. The catalysts were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. With these catalysts, cohydrogenation behaviors of coal-oil have been carried out with Hami Baishihu coal and Karamay petrochemical coking residual oil under conditions of 400 °C, initial pressure of 7 MPa, and reaction time of 1 h. The results showed that the coal conversion rate reached 98.45% and the oil yield reached 77.73% when the catalyst prepared with FeCl3·6H2O as an iron source was added. Compared with research results reported in the literature, under the same conditions, the catalyst prepared in this article showed better catalytic activity in the cohydrogenation of coal-petrochemical coking residual oil.

Bio-inspired fabrication of nacre-mimetic hybrid nanocoating for eco-friendly fire-resistant precious cellulosic Chinese Xuan paper.

Nacre-mimetic materials possess excellent thermostability and barrier performance which provide novel idea for high efficient flame retardant strategy. In this study, we propose an eco-friendly approach to fabricate fire-resistant cellulosic Chinese Xuan paper by layer-by-layer (LBL) assembly chitosan (CH) and montmorillonite (MMT). The flame retardancy of Xuan paper was greatly improved after the LBL assembly coated CH/MMT, it achieved excellent flame retardancy when the CH/MMT bilayer was over 10 BL with the LOI value higher than of 35 %. The results of thermal stability of treated Xuan paper revealed the nacre-mimetic CH/MMT nanocoating on Xuan paper would promote the formation of compact and dense char which will be beneficial to inhibit the heat transmission and combustible gas diffusion. The ink wetting performance was also investigated in this study. This research would provide experimental basis for the development of fire-resisting paper using bio-mimetic method to construct nacre-mimetic organic/inorganic hybrid flame retardant system.