ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Hydrothermal treatment (HTT) is a promising process for conversing lignocellulosic biomass into solid fuel with higher carbon content. To investigate humification and carbonization characteristic of solid products from biomass HTT, the hydrothermal experiments were carried out in an autoclave using wheat-straw as raw materials at temperature 220℃. The residence time were set as 30, 60, 90, 120 and 180min, respectively. The micro-structure and chemical composition of solid products were analyzed by using X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The experimental results showed that the carbon content in the solid increased from 45.86% for 30 min to 49.06% for 180min. There was a strong peak in the diffraction angle 2θ of 26° in the XRD spectrum at residence time 60min. The microcrystalline structure of the solid approached to that of graphite. With the residence time increasing, the degree of aromatization and carbonization increased. The solid products contained numerous humus, had plenty of aromatic structure and oxygen functional groups. Longer residence time was favorable for raising the extent of carbonization of solid products during biomass HTT. The research results provided a data reference for the fundamental process control and improvements of hydrothermal carbonization of biomass.