Thermal Mechanical Characteristics Analysis of Hydrogen Release Reaction Process of Lithium Aluminum Hydride Particle and Its Constant Rate Hydrogen Release Technology

CHEN Ming; HE Huizhi; LI Zhihui; ZHANG Kai; WANG Yunan; YU Jiang; SHEN Yizhou; JI Weilian; ZHANG Hui; REN Chang; CHENG Yonghong

doi:10.7652/xjtuxb202605007

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Thermal Mechanical Characteristics Analysis of Hydrogen Release Reaction Process of Lithium Aluminum Hydride Particle and Its Constant Rate Hydrogen Release Technology

更新时间：2026-04-27

- Thermal Mechanical Characteristics Analysis of Hydrogen Release Reaction Process of Lithium Aluminum Hydride Particle and Its Constant Rate Hydrogen Release Technology
- Journal of Xi'an Jiaotong University Vol. 60, Issue 5, Pages: 71-81(2026)
- 作者机构：
  
  国网上海市电力公司市南供电公司，200240，上海
  西安交通大学电工材料电气绝缘全国重点实验室，710049，西安
  西安一九零八新能源科技有限公司，710138，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202605007
  CLC： TK91
- Received：04 September 2025，
  
  Published：10 May 2026
- 稿件说明：
移动端阅览
CHEN Ming, HE Huizhi, LI Zhihui, et al. Thermal Mechanical Characteristics Analysis of Hydrogen Release Reaction Process of Lithium Aluminum Hydride Particle and Its Constant Rate Hydrogen Release Technology[J]. Journal of Xi'an Jiaotong University, 2026, 60(5): 71-81.
DOI：

CHEN Ming, HE Huizhi, LI Zhihui, et al. Thermal Mechanical Characteristics Analysis of Hydrogen Release Reaction Process of Lithium Aluminum Hydride Particle and Its Constant Rate Hydrogen Release Technology[J]. Journal of Xi'an Jiaotong University, 2026, 60(5): 71-81. DOI： 10.7652/xjtuxb202605007.

摘要

针对氢化铝锂水解释氢反应速度超快、难以控制的难题，从氢化铝锂颗粒与水反应基本特性研究入手，研究了氢化铝锂颗粒水解反应的热-力过程，设计了一种包含储氢材料反应料仓的恒速释氢装置，研究了氢化铝锂颗粒粒径、材料成型力、料柱直径对水解释氢特性曲线的影响。结果表明：氢化铝锂颗粒在水解反应中受到热膨胀浮力、微气泡推力、流体阻力、静水浮力、重力的作用，整个水解释氢过程包含驱动加速、阻力平衡、减速沉降3个阶段。其中，驱动加速阶段氢气迅速上升，材料颗粒受到微气泡推力占主导，推动颗粒也迅速上升；阻力平衡阶段氢气已释放、颗粒相对运动速度逐步下降，流体阻力逐步占主导，颗粒逐渐达到阻力平衡；减速沉降阶段由于反应生成物的重力大于浮力，反应生成物逐步沉降；在19.6 kN材料成型力下，筛网目数为200左右的氢化铝锂颗粒的恒速释氢效果最好。该研究为未来将氢化铝锂作为氢能载体使用提供了一种安全、有效、可控的恒速释氢的方法。

Abstract

To address the challenge of the extremely fast and difficult-to-control hydrogen release rate during the hydrolysis reaction of lithium aluminum hydride (LiAlH

)

An investigation into the fundamental characteristics of the reaction between LiAlH

particles and water is begun. The thermal-mechanical process of LiAlH

particle hydrolysis is examined. A constant-rate hydrogen release device incorporating a reaction chamber for the hydrogen storage material is designed. The effects of LiAl H

particle size

material forming force

and material column diameter on the hydrogen release characteristic curves during hydrolysis are investigated. The results indicate that during the hydrolysis reaction

LiAl H

particles are subjected to thermal expansion buoyancy

microbubble thrust

fluid resistance

static water buoyancy

and gravity. The entire hydrogen release process during hydrolysis comprises three stages：driving acceleration

resistance equilibrium

and deceleration sedimentation. In the driving acceleration stage

hydrogen is rapidly released

and the microbubble thrust dominates

propelling the particles to rise r

apidly. During the resistance equilibrium stage

hydrogen release nears completion

the relative motion speed of the particles gradually decreases

and fluid resistance becomes dominant

leading the particles to approach a state of resistance equilibrium. In the deceleration sedimentation stage

the reaction products sediment gradually due to their gravity exceeding buoyancy. Under a material forming force of 19.6 kN

LiAl H

particles with a particle size around 200 mesh exhibit the most effective constant-rate hydrogen release. It provides a safe

effective

and controllable method for achieving constantrate hydrogen release from LiAl H

supporting its potential future application as a hydrogen energy carrier.

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Keywords

references

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