Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Material Life Cycle Assessment of Mg-CaO-10 wt.% MWCNT Hydrogen Storage Composites

수소저장용 Mg-CaO-10 wt.% MWCNT 복합체의 물질 전과정 평가

  • HAN, JEONG-HEUM (Department of Materials Science & Engineering, Korea National University of Transportation) ;
  • LEE, YOUNG-HWAN (Department of Materials Science & Engineering, Korea National University of Transportation) ;
  • YU, JAE-SEON (Department of Materials Science & Engineering, Korea National University of Transportation) ;
  • HONG, TAE-WHAN (Department of Materials Science & Engineering, Korea National University of Transportation)
  • 한정흠 (한국교통대학교 화공신소재고분자공학부 신소재공학전공) ;
  • 이영환 (한국교통대학교 화공신소재고분자공학부 신소재공학전공) ;
  • 유제선 (한국교통대학교 화공신소재고분자공학부 신소재공학전공) ;
  • 홍태환 (한국교통대학교 화공신소재고분자공학부 신소재공학전공)
  • Received : 2019.05.30
  • Accepted : 2019.06.30
  • Published : 2019.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Magnesium hydride has a high hydrogen storage capacity (7.6 wt.%), and is cheap and lightweight, thus advantageous as a hydrogen storage alloy. However, Mg-based hydrides undergo hydrogenation/dehydrogenation at high temperature and pressure due to their thermodynamic stability and high oxidation reactivity. MWCNTs exhibit prominent catalytic effect on the hydrogen storage properties of $MgH_2$, weakening the interaction between Mg and H atoms and reducing the activation energy for nucleation of the metal phase by co-milling Mg with carbon nanotubes. Therefore, it is suggested that combining transition metals with carbon nanotubes as mixed dopants has a significant catalytic effect on the hydrogen storage properties of $MgH_2$. In this study, Material life cycle evaluation was performed to analyze the environmental impact characteristics of Mg-CaO-10 wt.% MWCNTs composites manufacturing process. The software of material life cycle assessment (MLCA) was Gabi 6. Through this, environmental impact assessment was performed for each process.

Keywords

SSONB2_2019_v30n3_220_f0001.png 이미지

Fig. 1. SEM image of (a) MgHx-CaO-10 wt.% MWCNT and mapping image of (b) MgHx-CaO-10 wt.% MWCNT in MgHx, (c) MgHx-CaO-10 wt.% MWCNT in carbon

SSONB2_2019_v30n3_220_f0002.png 이미지

Fig. 2. XRD patterns of MgHx-CaO fabricated with 96 hours BCR 66:1 and MgHx-CaO-graphene/MWCNT (Mg: ●, MgH2: ◐, CaO: ♧, C Carbon: ♠)

SSONB2_2019_v30n3_220_f0003.png 이미지

Fig. 5. Process flow diagram for Mg-CaO-MWCNT

SSONB2_2019_v30n3_220_f0004.png 이미지

Fig. 3. Results for MgHx-CaO, MgHx-CaO-MWCNT composites by (a) TG analysis and (b) DSC analysis

SSONB2_2019_v30n3_220_f0005.png 이미지

Fig. 6. Impact assessment results for manufacturing process of Mg-CaO-MWCNT by CML2001

SSONB2_2019_v30n3_220_f0006.png 이미지

Fig. 7. Impact assessment results for manufacturing process of Mg-CaO-MWCNT by EI 99’

SSONB2_2019_v30n3_220_f0007.png 이미지

Fig. 8. Co2 and Human toxicity emissions of Mg-CaO-MWCNT, human toxicity emissions of Mg-CaO

SSONB2_2019_v30n3_220_f0008.png 이미지

Fig. 9. Human toxicity emission distribution

SSONB2_2019_v30n3_220_f0009.png 이미지

Fig. 4. Kinetics results of MgHx-CaO and MgHx-CaO-MWCNT composites

Table. 1. Particle size analysis of MgHx-CaO-MWCNT compo-sites

SSONB2_2019_v30n3_220_t0001.png 이미지

References

  1. M. Calizzi, D. Chericoni, L. H. Jepsen, T. R. Jensen, and L. Pasquini, "Mg-Ti nanoparticles with superior kinetics for hydrogen storage", International Journal of Hydrogen Energy, Vol. 41, No. 32, 2016, pp. 14447-14454, doi: https://doi.org/10.1016/j.ijhydene.2016.03.071.
  2. J. K. Lee and S. K. Kim, "Effect of CaO addition on the ignition resistance of Mg-Al alloys", Materials transactions, Vol. 52, No. 7, 2011, pp. 1483-1488, doi: https://doi.org/10.2320/matertrans.m2010397.
  3. J. Xiao, M. Hu, D. Cossement, P. Benard, and R. Chahine, "Finite element simulation for charge-discharge cycle of cryo-adsorptive hydrogen storage on activated carbon", International Journal of Hydrogen Energy, Vol. 37, No. 17, 2012, pp. 12947-12959, doi: https://doi.org/10.1016/j.ijhydene.2012.05.072.
  4. A. M. Rashidi, A. Nouralishahi, A. A. Khodadadi, Y. Mortazavi, A. Karimi, and K. Kashefi, "Modification of single wall carbon nanotubes (SWNT) for hydrogen storage", International Journal of Hydrogen Energy, Vol. 35, No. 17, 2010, pp. 9489-9495, doi: https://doi.org/10.1016/j.ijhydene.2010.03.038.
  5. S. ullah Rather, A. A. Taimoor, A. Muhammad, Y. A. Alhamed, S. F. Zaman, and A. M. Ali, "Kinetics of hydrogen adsorption on MgH2/CNT composite", Materials Research Bulletin, Vol. 77, 2016, pp. 23-28, doi: https://doi.org/10.1016/j.materresbull.2016.01.025.
  6. B. S. Amirkhiz, M. Danaie, and D. Mitlin, "The influence of SWCNT-metallic nanoparticle mixtures on the desorption properties of milled $MgH_2$ powders", Nanotechnology, Vol. 20, No. 20, 2009, p. 204016, doi: https://doi.org/10.1088/0957-4484/20/20/204016.
  7. L. Popilevsky, V. M. Skripnyuk, M. Beregovsky, M. Sezen, Y. Amouyal, and E. Rabkin, "Hydrogen storage and thermal transport properties of pelletized porous Mg-2 wt.% multiwall carbon nanotubes and Mg-2 wt.% graphite composites", International Journal of Hydrogen Energy, Vol. 41, No. 32, 2016, pp. 14461-14474, doi: https://doi.org/10.1016/j.ijhydene.2016.03.014.
  8. S. H. Lee and Y. M. Jo, "Review of National Policies on the Utilization of Waste Metal Resources", Prospectives of Industrial Chemistry, Vol. 13, No. 1, 2010, pp. 2-9. Retrieved from: http://kiss.kstudy.com/thesis/thesis-view.asp?key=2822866.
  9. S. S. Lee, N. R. Lee, K. I. Kim, and T. W. Hong, "Environmental Impacts Assessment of ITO (Indium Tin Oxide) Using Material Life Cycle Assessment", Vol. 18, No. 1, 2012, pp. 69-75, doi: https://doi.org/10.7464/ksct.2012.18.1.069.
  10. I. Mahmud, S. C. Ur, and M. S. Yoon, "Effect of high-energy milling process on microstructure and piezoelectric/dielectric properties of 0.99 Pb ($Zr_{0.53}\;Ti_{0.47}$) $O_3$-0.01 $BiYO_3$ ceramic for piezoelectric energy harvesting devices", Electronic Materials Letters, Vol. 10, No. 1, 2014, pp. 223-228, doi: https://doi.org/10.1007/s13391-013-3060-z.
  11. X. Yao, C. Wu, A. Du, G. Q. Lu, H. Cheng, S. C. Smith, J. Zou, and Y. He, "Mg-based nanocomposites with high capacity and fast kinetics for hydrogen storage", J. Phys. Chem. B, Vol. 110, No. 24, 2006, pp. 11697-11703, doi: https://doi.org/10.1021/jp057526w.
  12. N. R. Lee, S. S. Lee, K. I. Kim, and T. W. Hong., "Environmental Assessment of Chemically Strengthened Glass for Touch Screen Panel by Material Life Cycle Assessment", Clean Technology, Vol. 18, No. 3, 2012, pp. 301-306, doi: https://doi.org/10.7464/ksct.2012.18.3.301.
  13. M. G. Kim, J. T. Son, and T. W. Hong, "Evaluation of TiN-Zr Hydrogen Permeation Membrane by MLCA (Material Life Cycle Assessment)", Clean Techonl, Vol. 24, No. 1, 2018, pp. 9-14, doi: https://doi.org/10.7464/ksct.2018.24.1.009.