Catalytic Cracking of Ammonia for Ammonia-Hydrogen Co-Firing in Gas Turbines

SI Gengfan; XIAO Tong; ZHANG Meng; WANG Jinhua; HUANG Zuohua

doi:10.7652/xjtuxb202606014

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Catalytic Cracking of Ammonia for Ammonia-Hydrogen Co-Firing in Gas Turbines

Special Topic Combustion Control | 更新时间：2026-06-12

- Catalytic Cracking of Ammonia for Ammonia-Hydrogen Co-Firing in Gas Turbines
- Journal of Xi'an Jiaotong University Vol. 60, Issue 6, Pages: 166-176(2026)
- 作者机构：
  
  西安交通大学绿色氢电全国重点实验室，710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202606014
  CLC： TK91
- Received：29 September 2025，
  
  Published：10 June 2026
- 稿件说明：
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SI Gengfan, XIAO Tong, ZHANG Meng, et al. Catalytic Cracking of Ammonia for Ammonia-Hydrogen Co-Firing in Gas Turbines[J]. Journal of Xi'an Jiaotong University, 2026, 60(6): 166-176.
DOI：

SI Gengfan, XIAO Tong, ZHANG Meng, et al. Catalytic Cracking of Ammonia for Ammonia-Hydrogen Co-Firing in Gas Turbines[J]. Journal of Xi'an Jiaotong University, 2026, 60(6): 166-176. DOI： 10.7652/xjtuxb202606014.

摘要

针对燃气轮机中氨燃料反应活性低、火焰稳定性差的问题，基于裂解氨强化燃烧策略，系统探究了氨的催化裂解特性，可在更温和的条件下实现氨氢融合燃烧。测试了不同类型催化剂在不同环境条件下的活性，并结合CT扫描重构技术，构建多孔介质催化裂解数值模型，揭示了不同结构参数对裂解效果的影响规律。研究结果表明：不同环境条件下，温度均为影响氨裂解过程的主导因素，温度升高50 K，氨裂解效率最大可提升25%；入口流量与环境压力的增大均对氨催化裂解过程呈现抑制作用；反应器结构的孔隙率由0.80降至0.35，氨裂解效率提升约1.3%，比表面积由833.3 m

-1

提高至2333.3m

-1

，氨裂解效率提升6%；床层直径的最优值为71 mm，过大或过小均会削弱氨的裂解性能。该研究揭示了氨裂解过程中的不同影响因素，可为燃气轮机余热驱动条件下氨燃料在线裂解系统的设计提供依据，促进氨燃料在燃气轮机中的高效清洁利用。

Abstract

To address the low reactivity and poor flame stability of ammonia fuel in gas turbines，the catalytic cracking characteristics of ammonia were systematically investigated based on an ammonia cracking-enhanced combustion strategy for ammonia-hydrogen co-firing under milder conditions.The activities of different catalyst types under varied environmental conditions were tested，and a numerical model of porous-media catalytic cracking was established using CT reconstruction technology to reveal the influence law of structural parameters on cracking.The study results showed that temperature was the dominant factor influencing the ammonia cracking process under varied environmental conditions.An increase of 50 K was found to raise the ammonia cracking efficiency by up to 25%.Increases in inlet flow rate and ambient pressure were observed to inhibit the catalytic cracking process of ammonia.When the porosity of the reactor structure was decreased from 0.80 to 0.35，the ammonia cracking efficiency was increased by approximately 1.3%；when the specific surface area was increased from 833.3 m

-1

to 2333.3 m

-1

，the cracking efficiency was increased by 6%.An optimal bed diameter of 71 mm was identified，and diameters larger or smaller than this value were found to degrade ammonia cracking performance.The study elucidates different factors influencing ammonia c

atalytic cracking.It is expected to provide a basis for the design of on-line cracking systems of ammonia fuel driven by gas turbine waste heat，thereby promoting the efficient and clean utilization of ammonia fuel in gas turbines.

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