Hydrogen Release: Thermodynamic and Kinetic Studies of NaBH4 Activated by Different Zeolite Nanoparticles

• Published in: Energy & fuels 2020-08, Vol.34 (8), p.10218-10224
• Main Authors: Xi, Senliang, Zhang, Peng, Fu, Yuanyi, Tome, Kudzaishe Caren, Zhang, Tonghuan, Zhou, Shixue, Guo, Youmin, Yu, Hao
• Format: Article
• Language: English
• Subjects: Batteries and Energy Storage
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/acs.energyfuels.0c01995

In this work, two kinds of zeolites MCM-22 and SAPO-34 were synthesized by the hydrothermal method. The mixture systems of NaBH4 and different mass percentages of zeolite were prepared by ball milling, with no reaction between NaBH4 and the zeolite during the process, as shown by X-ray diffraction analysis. Thermal decomposition of NaBH4 and NaBH4 + zeolite for hydrogen release was investigated by temperature-programmed desorption, differential scanning calorimetry, and pressure composition isothermal methods. It is shown that the presence of zeolites can decrease the hydrogen release temperature. In addition, in comparison to pure NaBH4, whose peak temperature of hydrogen release was 566.8 °C, the peak temperatures of NaBH4 + MCM-22 (1:1) and NaBH4 + SAPO-34 (1:1) decreased to 510.0 and 505.2 °C, respectively. Moreover, the addition of zeolite can improve the hydrogen release kinetics of NaBH4 and when catalyzed by MCM-22 and SAPO-34 can release 2.31 and 3.76 wt. % H2 in 15 h, respectively. Furthermore, SAPO-34 with the larger specific surface area had a better nanoconfinement effect to catalyze hydrogen release of NaBH4 than that of MCM-22.