Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China.
Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
Bioresour Technol. 2018 Feb;249:574-581. doi: 10.1016/j.biortech.2017.10.046. Epub 2017 Oct 16.
In order to investigate the influence of hydrothermal carbonization (HTC) on the properties of the hydrochars, sawdust with a particle size below 0.45mm was treated in an autoclave at 200-260°C. The physical and chemical characteristics of products were studied, including proximate analysis, elemental composition, fiber content, surface area, bulk density, energy yield, color value, combustion activities and pyrolysis kinetics, etc. It showed that the color of hydrochars turned blacker, greener, and bluer after HTC. The ash, carbon, hydrogen and lignin contents showed a good correlation (R>0.96) with color coordinates. The decrement in stage 1 and increment in stage 2 of temperature intervals were attributed to the volatile matters removal and fixed carbon accumulation, improving the stability and safety of hydrochars combustion. As shown by the Kissenger-Akahira-Sunose (KAS) and Coats-Redfern calculations, the HTC process can also make the pyrolysis more stable.
为了研究水热碳化（HTC）对水焦特性的影响，将粒径小于 0.45mm 的木屑在高压釜中于 200-260°C 下进行处理。研究了产物的物理化学特性，包括工业分析、元素组成、纤维含量、比表面积、堆积密度、能量产率、颜色值、燃烧活性和热解动力学等。结果表明，HTC 后水焦的颜色变得更黑、更绿、更蓝。灰分、碳、氢和木质素含量与颜色坐标呈良好的相关性（R>0.96）。温度间隔阶段 1 的减少和阶段 2 的增加归因于挥发分的去除和固定碳的积累，提高了水焦燃烧的稳定性和安全性。由 Kissenger-Akahira-Sunose（KAS）和 Coats-Redfern 计算可知，HTC 过程也可以使热解更加稳定。
