Effect of Various Additives on the Hydrolysis Performance of Nanostructured MgH2 Synthesized by High-Energy Ball Milling in Hydrogen

Geometric Optimization of Hydrolysis Reactors to Enhance MgH2 Hydrolysis Performance

“…The hydrolysis equation of MgH 2 is shown in eq 1, which can simultaneously release the hydrogen in the water; then released hydrogen can reach 15.2 wt %. 33 However, the poor hydrolysis kinetics limits its application. 34 The generated Mg(OH) 2 during the MgH 2 hydrolysis will cover the surface of MgH 2 and affects its hydrolysis performance In view of this, many methods have been proposed to improve the hydrolysis kinetics.…”

“…The hydrolysis equation of MgH 2 is shown in eq , which can simultaneously release the hydrogen in the water; then released hydrogen can reach 15.2 wt % . However, the poor hydrolysis kinetics limits its application .…”

“…In view of this, many methods have been proposed to improve the hydrolysis kinetics. For example, (1) reducing the particle size by ball milling. − Here, ball milling can effectively reduce the crystallite size and increase the reaction surface area, which can improve hydrolysis performance. , Xie et al report that the hydrolysis conversion of MgH 2 –Nb 2 O 5 increased from 43.1 to 73.6% and the crystallite size decreased from 40 to 10 μm by ball milling for 3 h; (2) adding additives and compounding with MgH 2 . − Zhou et al prepared MgH 2 –10 wt % CoCl 2 by milling, and the conversion increased from 5.7 to 91.7%. Ma et al reported that the hydrolysis conversion of MgH 2 –LiNH 2 was 61.2% higher than that of pure MgH 2 ; (3) changing the composition of the hydrolysis solution. − Yuan et al increased the hydrogen production rate of MgH 2 from 94.0 to 1664 mL/g by adding Fe 2 (SO 4 ) 3 into the hydrolysis solution; Markman et al used acetic acid solution as the hydrolysis solution to increase the MgH 2 conversion from 13 to over 80%.…”