Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 39, Issue 9, Pages 4437-4446Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.01.031
Keywords
Hydrogen isotope; Molecular sieve; Separation mechanism; Adsorption
Categories
Funding
- National Natural Science Foundation of China [21106051, 51106061, 21276101]
- Natural Science Foundation of Jiangsu Universities [11KJA150004]
- Foundation of Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials [JSKC13132]
- Program for Excellent Youth of Jiangsu Qinglan Project
- Program for Science and Technology Development of Huai'an [HC201204, HAG2013073]
- Program for Excellent Youth of Huaiyin Normal University [11HSQNZ10]
Ask authors/readers for more resources
The separation of a hydrogen isotope mixture on porous materials was studied using equilibrium and breakthrough experiments. The adsorption equilibria of H-2 and D-2 on SBA-15 with mesopores and molecular sieves 5A, Y, and 10X with micropores were measured at 77 K using the volumetric method. The breakthrough experiments of a H-2 and D-2 mixture in each adsorbent bed were carried out at various conditions of flow rate and pressure. The equilibrium ratio of D-2 TO H-2 on mesoporous molecular sieves was larger than the ratio on microporous molecular sieves (SBA-15 > 10X > Y > 5A), but the difference among the adsorbents decreased with increases in pressure. On the other hand, the order of breakthrough separation factor showed the opposite result (SBA-15 < 10X < Y < 5A). The breakthrough separation fact ors for zeolite 10X was approximately equal to the equilibrium ratio of D-2 TO H-2 at the corresponding partial pressures, whereas zeolites 5A and Y showed higher breakthrough separation factors than their equilibrium ratios. In SBA-15, the separation factors from breakthrough results were even smaller than the corresponding equilibrium ratio. In the microporous adsorbent with a limited pore size (zeolite 5A in the study), the diffusion mechanism contributed to the separation of hydrogen isotope gases as one of key factors. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available