超临界水流速对煤颗粒群气化制氢速率的影响  

The Influence of Supercritical Water Flow Rate on the Hydrogen Production Rate by Gasification of Coal Particles

作　　者：黄瀚 赵帅琪 张瑞 赵昆鹏 白博峰[1] HUANG Han;ZHAO Shuaiqi;ZHANG Rui;ZHAO Kunpeng;BAI Bofeng(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2025年第4期1188-1194,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金基础科学中心项目(No.52488201);国家自然科学基金青年基金项目(No.52206208);陕西省三秦英才特殊支持计划。

摘　　要：煤炭超临界水气化制氢技术为化石能源的清洁低碳、安全高效转化提供了重要的技术方向。本文针对气化制氢反应器内的流固两相流动、传热和均相/异相化学反应过程,构建了反应器尺度的多组分超临界流体湍流与反应颗粒群四向耦合数值模拟方法,研究了反应器内超临界水流速对煤颗粒群制氢速率的影响规律及机制,明确了反应器内自然对流涡对流固反应的促进作用,并发现对流涡的流动方向随着反应的进行存在反转现象;阐明了反应器出口产氢速率随着超临界水流速的增加而增大,给出了超临界水与煤浆进料流量比的最优区间。The technology of hydrogen production through coal gasification in supercritical wa-ter provides a significant technical direction for clean,low-carbon,safe,and efficient fossil energy conversion.In this paper,considering the fluid-solid two-phase flow,heat transfer and homoge-neous/heterogeneous chemical reaction processes,a numerical simulation method for reactor-scale four-way coupling of multicomponent supercritical fluid turbulence and reactive particle has been established.The influence of supercritical water flow rate on the hydrogen production rate of coal particles in the reactor is investigated.The study clarifies the role of natural convective vortices in the reactor in promoting the fluid-solid reaction.It is found that the flow direction of convective vortices is reversed as the reaction proceeds.It is clarified that the hydrogen production rate at the reactor outlet increased with the increase of the supercritical water flow rate,and the optimal interval of the ratio of the supercritical water flow rate to the coal slurry feed flow rate was given.

关 键 词：颗粒动力学 超临界流体湍流 煤炭超临界水气化 制氢 计算流体力学 

分 类 号：TK16[动力工程及工程热物理—热能工程]