Abstract In this paper, we studied the mechanochemical reactions between a series of metal carbonates and metal hydrides in the absence of a catalyst and found that the alkaline earth metal carbonate-hydride systems show better methanation performances because these systems possess favorable thermodynamic properties. Among them, the CaCO3-MgH2 system shows the best methanation performances. By tuning the reaction mixture composition and enhancing the rate and duration of ball milling, the CH4 yield and content of the CaCO3-MgH2 system can reach 89% and 90%, respectively, which are increased by 16% and 40%, compared to the best results in the previous reports.

中文翻译：

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改进金属碳酸盐-氢化物系统的机械化学甲烷化性能

摘要 在本文中，我们研究了一系列金属碳酸盐和金属氢化物在无催化剂存在下的机械化学反应，发现碱土金属碳酸盐-氢化物体系表现出更好的甲烷化性能，因为这些体系具有良好的热力学性质。其中，CaCO3-MgH2体系表现出最好的甲烷化性能。通过调整反应混合物组成，提高球磨速率和球磨持续时间，CaCO3-MgH2体系的CH4产率和含量分别达到89%和90%，较之前提高了16%和40%。以前报告中的最佳结果。