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Kinetics-Based analysis of the gliding arc plasma assisted ammonia decomposition process towards vehicle on-board applications

Chemical Engineering Journal, ISSN: 1385-8947, Vol: 505, Page: 159443
2025
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Article Description

Ammonia has recently emerged as a promising carrier for hydrogen storage and transportation. Through an onboard ammonia decomposition unit (DU), ammonia can be converted into hydrogen, facilitating on-demand hydrogen production in vehicles. Among the various methods for ammonia decomposition, the gliding arc plasma (GAP) technique is notable for its ability to operate at high flow rates and its rapid response capability, making it particularly suitable for vehicle applications. However, the intricate kinetics governing the GAP-assisted ammonia decomposition process remain insufficiently understood. In this paper, a reaction kinetics-based analysis of a GAP reactor, potentially applicable in a vehicle onboard DU, is conducted both experimentally and numerically. A quasi-1-dimensional GAP ammonia decomposition model was developed. Based on the model, we conducted reaction pathway analysis and sensitivity analysis of key components, elucidating the reasons behind the observed trends in ammonia decomposition process. The results indicate that both plasma (NH 3 * → NH 2 → H 2 ) decomposition and thermal (NH 3 → NH 2 ) decomposition play major roles, with the balance of these reactions determining the final energy efficiency of the GAP reactor. The fastest plasma reactions for ammonia consumption and hydrogen formatting are both NH 3 + H → NH 2 + H 2, accounting for 51.9 % of ammonia consumption and 82.1 % of hydrogen production. Additionally, thermal effects significantly impact the decomposition process by optimizing reaction pathways, increasing reaction rates, and influencing energy efficiency.

Bibliographic Details

Guangyu Dong; Yanxiong Zhou; Pingwen Ming; Zhijun Wu; Haie Chen; Yi Huang; Liguang Li

Elsevier BV

Chemistry; Environmental Science; Chemical Engineering; Engineering

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