Dong Ho Nguyen , Phu Quoc Nguyen , Sang Moon Kim , Ji Hoon Kim , Gyu Hyeon Shim , Ho Seon Ahn
{"title":"氨制氢:便携式裂解系统及相关微通道反应器的初步设计","authors":"Dong Ho Nguyen , Phu Quoc Nguyen , Sang Moon Kim , Ji Hoon Kim , Gyu Hyeon Shim , Ho Seon Ahn","doi":"10.1016/j.ijhydene.2025.04.241","DOIUrl":null,"url":null,"abstract":"<div><div>This study introduces an innovative and energy-efficient portable ammonia decomposition system designed for mobile applications. Key features include: (1) a capillary tube that utilizes ambient heat to evaporate liquid ammonia, reducing energy consumption by 7.7 %; (2) a plate heat exchanger that recovers heat from reactor products to preheat the ammonia feed, cutting reactor heating energy by 8.7 %; and (3) a microchannel reactor with Joule heating, which significantly lowers thermal resistance compared to conventional combustion methods. Heat balance analysis shows that heating power accounts for approximately 47 % of total generated electricity during startup and 38.9 % during steady operation. In addition, this work presents the first integration of microchannel technology with Joule heating for ammonia decomposition. A 3D model, developed in COMSOL Multiphysics 6.1, explores the effects of heating power, catalyst thickness, channel length, and hydraulic diameter on reactor performance. Results reveal that the system operates under reaction-controlled conditions (Damköhler number <0.1), making heating power the most influential factor for ammonia conversion. Mass transfer is sufficiently rapid, limiting the impact of catalyst layer thickness, channel length, and hydraulic diameter on conversion but significantly affecting pressure drop. Moreover, to optimize reactor performance, a multi-objective framework is proposed, combining a modified building performance optimization (BPO) technique, artificial neural networks (ANNs), and the Non-dominated Sorting Genetic Algorithm II (NSGA-II algorithm). Key design parameters, including channel dimensions, were optimized to maximize ammonia conversion and minimize pressure drop. The TOPSIS decision-making method identified an optimal design, achieving a 26.68 % improvement in conversion and an 85.79 % reduction in pressure drop compared to the base case. Overall, the results of this paper provide a comprehensive strategy for designing a mobile hydrogen production system and microchannel reactors for hydrogen production via ammonia decomposition powering 1 kW PEMFC.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"128 ","pages":"Pages 597-612"},"PeriodicalIF":8.3000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hydrogen production from ammonia: Preliminary design of portable cracking system and related micro-channel reactor\",\"authors\":\"Dong Ho Nguyen , Phu Quoc Nguyen , Sang Moon Kim , Ji Hoon Kim , Gyu Hyeon Shim , Ho Seon Ahn\",\"doi\":\"10.1016/j.ijhydene.2025.04.241\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study introduces an innovative and energy-efficient portable ammonia decomposition system designed for mobile applications. Key features include: (1) a capillary tube that utilizes ambient heat to evaporate liquid ammonia, reducing energy consumption by 7.7 %; (2) a plate heat exchanger that recovers heat from reactor products to preheat the ammonia feed, cutting reactor heating energy by 8.7 %; and (3) a microchannel reactor with Joule heating, which significantly lowers thermal resistance compared to conventional combustion methods. Heat balance analysis shows that heating power accounts for approximately 47 % of total generated electricity during startup and 38.9 % during steady operation. In addition, this work presents the first integration of microchannel technology with Joule heating for ammonia decomposition. A 3D model, developed in COMSOL Multiphysics 6.1, explores the effects of heating power, catalyst thickness, channel length, and hydraulic diameter on reactor performance. Results reveal that the system operates under reaction-controlled conditions (Damköhler number <0.1), making heating power the most influential factor for ammonia conversion. Mass transfer is sufficiently rapid, limiting the impact of catalyst layer thickness, channel length, and hydraulic diameter on conversion but significantly affecting pressure drop. Moreover, to optimize reactor performance, a multi-objective framework is proposed, combining a modified building performance optimization (BPO) technique, artificial neural networks (ANNs), and the Non-dominated Sorting Genetic Algorithm II (NSGA-II algorithm). Key design parameters, including channel dimensions, were optimized to maximize ammonia conversion and minimize pressure drop. The TOPSIS decision-making method identified an optimal design, achieving a 26.68 % improvement in conversion and an 85.79 % reduction in pressure drop compared to the base case. Overall, the results of this paper provide a comprehensive strategy for designing a mobile hydrogen production system and microchannel reactors for hydrogen production via ammonia decomposition powering 1 kW PEMFC.</div></div>\",\"PeriodicalId\":337,\"journal\":{\"name\":\"International Journal of Hydrogen Energy\",\"volume\":\"128 \",\"pages\":\"Pages 597-612\"},\"PeriodicalIF\":8.3000,\"publicationDate\":\"2025-04-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Hydrogen Energy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0360319925019184\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Hydrogen Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360319925019184","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Hydrogen production from ammonia: Preliminary design of portable cracking system and related micro-channel reactor
This study introduces an innovative and energy-efficient portable ammonia decomposition system designed for mobile applications. Key features include: (1) a capillary tube that utilizes ambient heat to evaporate liquid ammonia, reducing energy consumption by 7.7 %; (2) a plate heat exchanger that recovers heat from reactor products to preheat the ammonia feed, cutting reactor heating energy by 8.7 %; and (3) a microchannel reactor with Joule heating, which significantly lowers thermal resistance compared to conventional combustion methods. Heat balance analysis shows that heating power accounts for approximately 47 % of total generated electricity during startup and 38.9 % during steady operation. In addition, this work presents the first integration of microchannel technology with Joule heating for ammonia decomposition. A 3D model, developed in COMSOL Multiphysics 6.1, explores the effects of heating power, catalyst thickness, channel length, and hydraulic diameter on reactor performance. Results reveal that the system operates under reaction-controlled conditions (Damköhler number <0.1), making heating power the most influential factor for ammonia conversion. Mass transfer is sufficiently rapid, limiting the impact of catalyst layer thickness, channel length, and hydraulic diameter on conversion but significantly affecting pressure drop. Moreover, to optimize reactor performance, a multi-objective framework is proposed, combining a modified building performance optimization (BPO) technique, artificial neural networks (ANNs), and the Non-dominated Sorting Genetic Algorithm II (NSGA-II algorithm). Key design parameters, including channel dimensions, were optimized to maximize ammonia conversion and minimize pressure drop. The TOPSIS decision-making method identified an optimal design, achieving a 26.68 % improvement in conversion and an 85.79 % reduction in pressure drop compared to the base case. Overall, the results of this paper provide a comprehensive strategy for designing a mobile hydrogen production system and microchannel reactors for hydrogen production via ammonia decomposition powering 1 kW PEMFC.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.