Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine
LNG is a potential alternative fuel for ships. Generating H<sub>2</sub> through exhaust reforming is an effective method to improve the performance of the LNG engine and reduce its pollutant emissions. It is necessary to study the mechanism of methane exhaust reforming to guide the desig...
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MDPI AG
2023-09-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/9/1455 |
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| author | Jie Shi Haoyu Yan Yuanqing Zhu Yongming Feng Zhifan Mao Xiaodong Ran Chong Xia |
| author_facet | Jie Shi Haoyu Yan Yuanqing Zhu Yongming Feng Zhifan Mao Xiaodong Ran Chong Xia |
| author_sort | Jie Shi |
| collection | DOAJ |
| description | LNG is a potential alternative fuel for ships. Generating H<sub>2</sub> through exhaust reforming is an effective method to improve the performance of the LNG engine and reduce its pollutant emissions. It is necessary to study the mechanism of methane exhaust reforming to guide the design of the reformer. Based on the detailed mechanism, the characteristics of methane reforming reaction were studied for a marine LNG engine. Firstly, the reforming characteristics of exhaust were studied. The results show that methane reforming requires a lean oxygen environment, and the hydrogen production reaction will not occur when the O<sub>2</sub> concentration is too high. Then, the effects of the O<sub>2</sub>/CH<sub>4</sub> ratio (0.2–1) and H<sub>2</sub>O/CH<sub>4</sub> ratio (0–2) on the reforming reaction were studied. The results show that under O<sub>2</sub>/CH<sub>4</sub> = 0.4, the molar fraction of hydrogen at the outlet of the reactor decreases with the increase in the H<sub>2</sub>O/CH<sub>4</sub> ratios. Finally, a mechanism analysis was conducted. The results show that an oxidation reaction occurs first and then the steam reforming reaction occurs on palladium-based catalysts. |
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| id | doaj.art-279f7c6c6efc4c69b022402ee0c38369 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T23:03:16Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-279f7c6c6efc4c69b022402ee0c383692023-11-19T09:31:32ZengMDPI AGAtmosphere2073-44332023-09-01149145510.3390/atmos14091455Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG EngineJie Shi0Haoyu Yan1Yuanqing Zhu2Yongming Feng3Zhifan Mao4Xiaodong Ran5Chong Xia6College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaLNG is a potential alternative fuel for ships. Generating H<sub>2</sub> through exhaust reforming is an effective method to improve the performance of the LNG engine and reduce its pollutant emissions. It is necessary to study the mechanism of methane exhaust reforming to guide the design of the reformer. Based on the detailed mechanism, the characteristics of methane reforming reaction were studied for a marine LNG engine. Firstly, the reforming characteristics of exhaust were studied. The results show that methane reforming requires a lean oxygen environment, and the hydrogen production reaction will not occur when the O<sub>2</sub> concentration is too high. Then, the effects of the O<sub>2</sub>/CH<sub>4</sub> ratio (0.2–1) and H<sub>2</sub>O/CH<sub>4</sub> ratio (0–2) on the reforming reaction were studied. The results show that under O<sub>2</sub>/CH<sub>4</sub> = 0.4, the molar fraction of hydrogen at the outlet of the reactor decreases with the increase in the H<sub>2</sub>O/CH<sub>4</sub> ratios. Finally, a mechanism analysis was conducted. The results show that an oxidation reaction occurs first and then the steam reforming reaction occurs on palladium-based catalysts.https://www.mdpi.com/2073-4433/14/9/1455methane reformingmechanismship enginesemission reductionChemkin |
| spellingShingle | Jie Shi Haoyu Yan Yuanqing Zhu Yongming Feng Zhifan Mao Xiaodong Ran Chong Xia Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine Atmosphere methane reforming mechanism ship engines emission reduction Chemkin |
| title | Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine |
| title_full | Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine |
| title_fullStr | Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine |
| title_full_unstemmed | Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine |
| title_short | Simulation Analysis of Methane Exhaust Reforming Mechanism Based on Marine LNG Engine |
| title_sort | simulation analysis of methane exhaust reforming mechanism based on marine lng engine |
| topic | methane reforming mechanism ship engines emission reduction Chemkin |
| url | https://www.mdpi.com/2073-4433/14/9/1455 |
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