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A hydrogen production method using latent heat of liquefied natural gas
Author(s) -
Ogawa Masaru,
Seki Tatsuyoshi,
Honda Hiroshi,
Nakamura Motomu,
Takatani Yoshiaki
Publication year - 2004
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10299
Subject(s) - liquefaction , liquefied natural gas , hydrogen production , hydrogen , waste management , natural gas , heat exchanger , latent heat , environmental science , process (computing) , process engineering , engineering , chemistry , mechanical engineering , computer science , thermodynamics , physics , organic chemistry , geotechnical engineering , operating system
In recent years, fuel cell electrical vehicles have offered promise of improving the urban environment. In particular, hydrogen‐fueled FCEVs have been considered for urban use because of their excellent characteristics such as short start‐up time, high responsiveness, and zero emissions. On the other hand, as far as hydrogen production is concerned, large amounts of CO 2 are exhausted into the atmosphere by the process of LNG reforming. In our research, we studied the utilization of LNG latent heat for hydrogen gas production as well as the liquefied hydrogen process. CO 2 capture in the liquid or solid state from hydrogen gas production by LNG was also studied. The results of our research show that the latent heat of LNG is very effective in cooling hydrogen gas for the conventional hydrogen liquefaction process. However, the latent heat LNG is not available for the LNG reforming process. If we want to use LNG latent heat for this process, we must develop a new hydrogen gas production process. In this new method, both hydrogen and CO 2 are cooled directly by LNG, and CO 2 is removed from the reforming gas. In order to make this method practical, we must develop a new type of heat exchanger to prevent solid CO 2 from interfering with performance. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(4): 32–42, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10299