【摘要】 中温固体吸附剂分离H₂/CO₂技术是煤化工水气变换过程中的重要技术,可同时实现显热H₂的利用及CO₂的集中捕集。其中关键为寻找合适中温下CO₂成型吸附剂的开发。本研究了成型过程中原位引入铝溶胶、碳酸钾及其添加条件对钾修饰水滑石吸附量、颗粒强度的影响规律,通过X射线衍射实验初步揭示了成型过程中钾修饰拟薄水铝石的形成过程,通过热重实验分析了钾修饰拟薄水铝石对吸附量的增加。挤出成型批次化颗粒吸附剂具有0.77 mmol/g CO₂吸附能力,同时相比于未加入碳酸钾时增加了约39%颗粒强度。更多还原

【Abstract】 H₂/CO₂ separation by solid sorbents at medium temperature range is an essential technology in water-gas-shift reaction process of coal chemical chemistry,which could utilize sensible heated H₂ and capture CO₂ simultaneously.The development of suitable shaped CO₂ adsorbent is a key point to put this technology into practice.In this research,the effects of several introduction methods of alumina sol and potassium carbonate in shaping process on the CO₂ capacity and mechanical strength of K-promoted hydrotalcite pellets are studied.X-ray diffraction is applied to demonstrate the forming process of K-promoted pseudo boehmite in forming stage and thermal gravimetric method is employed to analysis the enhancement of CO₂ capacity from K-promoted pseudo boehmite.Adsorbent pellets extruded in batches have a CO₂ capacity of 0.77 mmol/g,also enjoy a 39%increase of mechanical strength compared with pellets without adding potassium carbonate.更多还原