The reaction containing CO₂ and H₂ has been investigated for the hydrogenation of CO₂ to formic acid using ruthenium hydrotalcite (Ru-HT) catalyst. Ruthenium salt was introduced to the synthesis of hydrotalcite as an active metal center to develop ruthenium based heterogeneous catalyst. Hydrotalcite not only acted as a support for the active metal but also acted as a soft solid base avoiding the use of the liquid base, which is normally required under homogeneous conditions for the formation of formic acid from the hydrogenation of CO₂. Reaction temperatures were in the range of 40–100 °C, total pressure 10–100 bar with an ideal 1:1 ratio of pCO₂:pH₂. The maximum Turnover Number (TON) of 11389 was obtained for the formic acid formation under the optimized conditions at 60 °C temperature and 60 bar total pressure, using a mixture of methanol:water as a solvent (5:1, v/v). Ru-HT catalyst was synthesised and thorougly characterized by FT-IR, PXRD, SEM-EDX and surface area analysis. The catalyst was effectively recycled up to 7 times without any loss in catalytic activity.

已经研究了使用钌水滑石（Ru-HT）催化剂将含有CO ₂和H ₂的反应用于将CO ₂加氢成甲酸的方法。将钌盐引入水滑石的合成中作为活性金属中心，以开发钌基非均相催化剂。水滑石不仅充当活性金属的载体，而且充当柔软的固体碱，避免使用液态碱，而液态碱通常是在均相条件下从CO ₂氢化形成甲酸所必需的。反应温度范围为40–100°C，总压力为10–100 bar，pCO ₂：pH ₂的理想比例为1：1。使用甲醇：水的混合物作为溶剂（5：1，v / v），在60°C温度和60 bar总压的最佳条件下，甲酸形成的最大周转数（TON）为11389 。合成了Ru-HT催化剂，并通过FT-IR，PXRD，SEM-EDX和表面积分析对其进行了表征。催化剂有效地循环使用多达7次，而催化活性没有任何损失。