CONVERSION OF PROTEN- AND FAT-CONTAINING WET BIOMASS WITH HOT COMPRESSED WATER
Tofu waste, a typical wet biomass containing both fat and protein compositions besides cellulose, is discharged after tofu production. The hydrothermal is preferred to be a low-energy mothod for such kind of high water content (over 90 wt％) biomass. In this report, the tofu waste was treated by hot compressed water at low-temperature (200～390 ℃) in a 10 ml stainless batch reactor, without addition of catalyst. Four kinds of prodcts including gases, water-solubles, water-insolubles and oils could be obtained after hydrothermal reactions, dpending on the temperature. The results showed that water temperature caused the most significant influence on the product allocation: below 250 ℃, gaseous product, water-soluble product, and water-insoluble product were yielded; and a oily matter separating completely from water get appeared above 250 ℃; the water-insolubles disappeared completely around 300 ℃; and and the oil fraction began to drop from yield of 30％ when the temperature over 350 ℃. With the increase of temperature gas yield increased, the major gaseous product of hydrothermal treatment is CO2 with certain amount of CO, from 250 ℃ CO decreased and disappeared around to 300 ℃, H2 and trace of CH4 can be detected and increased when temperature over 300 ℃. The convesion of TW in HCW was understtod by a four-stage mechanism. The chemical analysis of the oily products indicates the hot compressed water has the functions of hydrogenation and deoxidation to the oily products.
Hydrothermal Hot compressed water Tofu waste Wet biomass Hydrogenation
Y.J. Tian K. Kumabe K. Matsumoto Y.S. Xie T. Hasegawa
EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya, 464-8603 Japan Institute of Process Engineering of Chinese Academy Sciences, Beijing, 100190 China
国际会议
北京
英文
1354-1358
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）