超临界水葡萄糖制氢中的多元气液相平衡

1引言生物质在超临界水中气化产生氢气成为一种具有发展前景的新能源技术。在超过水的临界点条件下,水的氧化性变强,生物质迅速水解并产生大量的气体产物:CO2、H2、CH4、CO和H2O等1]。目前许多国家相继展开相关研究,研究葡萄糖或者纤维素在不同反应条件下的气体产物情况2],确

Multiple Vapor-liquid Phase Equilibrium in Hydrogen Preparation from Glucose in Supercritical Water

By using a PC-SAFT(perturbed chain statistical associating fluid theory) model, a study was conducted of the specific features of vapor-liquid equilibrium located at the gas-liquid separator of a hydrogen preparation system involving glucose gasification in supercritical water.A comparison with the experimental data shows that the theoretical calculation results are rational.Under a same material-feeding condition,CO,H_2 and CH_4 gas phase share in the vapor-liquid equilibrium system will gradually decrease with a rise in pressure.However,CO_2 and H_2O gas phase share will gradually increase.Therefore,a low-pressure separation will contribute to a purer combustible gas-phase product.The experimental results show that the operating pressure has little influence on the glucose-gasified product.However,in summing up the effect of pressure on solubility,one can conclude that a high pressure can virtually be favorable to the gasification of glucose.