超富集植物超临界水气化产气特性研究

Study on supercritical water plant gasification by supercritical water gasification

超富集植物是植物修复技术的基础,将其进行气化反应,能够得到CH4、H2等可燃气体,以实现生物质能源化。本文选用超富集蜈蚣草,将其进行超临界水气化反应,通过改变实验温度、压力和停留时间,来探究其对气相产物的影响。实验表明,在超临界状态点附近将温度从390℃升高至460℃的过程中,气体产物中的H2和CH4的占比逐渐升高;CO2的占比逐渐减少。而反应压力的增加、停留时间的延长,对气相产物的组分的变化没有像温度那样明显。

Super-enriched plants are the basis of phytoremediation technology.Combustion of them with gasification can obtain combustible gases such as CH4 and H2 to realize biomass energy.In this paper,ultra-enriched Yarrow is selected for supercritical water gasification reaction,and its effect on gas-phase products is explored by changing the experimental temperature,pressure,and residence time.Experiments show that during the process of increasing the temperature from 390℃to 460℃near the supercritical state point,the proportion of H2 and CH4 in the gas product gradually increases;the proportion of CO2 gradually decreases.The increase of the reaction pressure and the extension of the residence time did not change the composition of the gas-phase products as much as the temperature.