生物质颗粒超临界水气化孔结构演变特性研究  

Study on Pore Structure Evolution of Biomass Particles During Supercritical Water Gasification

作　　者：王翠[1,2,3,4,5] 金辉[4] WANG Cui;JIN Hui(School of Water and Environment,Chang'an University,Xi'an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of the Ministry of Education,Chang'an University,Xi'an 710054,China;Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources,Chang'an University,Xi'an 710054,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Key Laboratory of Low-grade Energy Utilization Technologies and Systems(Chongqing University),Ministry of Education of China,Chongqing Universit,y,Chongqing 400044,China)

机构地区：[1]长安大学水利与环境学院,西安710054 [2]旱区地下水文与生态效应教育部重点实验室,西安710054 [3]水利部旱区生态水文与水安全重点实验室,西安710054 [4]西安交通大学动力工程多相流国家重点实验室,西安710049 [5]低品位能源利用技术及系统教育部重点实验室,重庆大学,重庆400044

出　　处：《工程热物理学报》2025年第2期513-519,共7页Journal of Engineering Thermophysics

基　　金：低品位能源利用技术及系统教育部重点实验室开放基金(No.LLEUTS202409)。

摘　　要：超临界水气化技术可实现生物质废弃物的资源化利用,由于超临界水具有独特的物性,颗粒孔结构形成及演变特性与常规状态有所不同,其极大地影响颗粒在超临界水中的流动传热化学反应,因此探究孔结构演变至关重要。本文首先基于间歇反应器开展生物质气化实验研究,其次对获得的固体颗粒孔结构特性进行全面表征,通过分析不同条件下颗粒孔结构特性获得了孔结构形成与演变规律。研究发现气化后颗粒孔容相较原料扩大了约57倍,比表面积扩大约86倍。Supercritical water gasification technology can realize the resource utilization of biomass waste.Formation and evolution of the pore structure of particles in supercritical water are different from that of the conventional state due to the unique physical properties of supercritical water.While pore structure affects the flow,heat transfer and chemical reaction of particles in supercritical water obviously,it is crucial to investigate the pore structure evolution.In this paper,biomass gasification experiment is carried out in the batch reactor first to obtain solid particles.Then the pore structure properties of the obtained solid particles are comprehensively characterized.The influence of different operating conditions on the formation and evolution of pore structure is obtained by analyzing the pore structure properties of the particles.It is found that the pore volume of biochar is about 57times higher than that of raw material,and the specific surface area is enlarged about 86 times.

关 键 词：超临界水气化 生物质 孔结构 

分 类 号：TK6[动力工程及工程热物理—生物能]