纳米CaCO3与碳粉低热固固耦合原位制备纳米CaO和CO
Low thermal solid-solid coupling reaction for in situ synthesis of nano-CaO and CO via nano-CaCO3 and carbon powder
陆子煊 1叶献民 2蔡正宇 3张冰姿 4唐美1
作者信息
- 1. 广西大学物理科学与工程技术学院,南宁 530004
- 2. 中国计量大学材料与化学学院,杭州 310018
- 3. 三亚学院盛宝金融科技商学院,海南三亚 572022
- 4. 杭州职业技术学院生态健康学院,杭州 310018
- 折叠
摘要
高温条件下固相CaO可直接与CO2反应生成CaCO3,CO2捕集率达78.57％(质量分数),是解决碳排放的高效手段.钙循环技术中如何降低CaCO3分解温度、CaO再生和CO2利用是关键问题.研究通过纳米Ca-CO3和碳粉的低热固固耦合反应同时实现纳米CaO再生和CO2原位转化为CO,使纳米CaCO3分解温度下降46 ℃,分解速率提高约50％,再生的多孔纳米CaO粒径小而均匀,可再次捕集CO2实现钙循环利用,由CO2转化的CO可应用于工业合成气.纳米CaCO3和碳粉具有原料来源广泛、价格低廉、安全性高、运输便捷等优点,该低热固固耦合反应在低成本前提下具有提高CO2捕集和利用效率的潜力.
Abstract
At high temperatures,solid-phase CaO can directly react with CO2,achieving a capture rate of 78.57 wt％and serving as an efficient means to address carbon emissions.Key challenges in calcium looping technolo-gy include reducing the decomposition temperature of CaCO3,regenerating CaO,and efficiently utilizing CO2.In this study,a low thermal solid-solid coupling reaction between nano-CaCO3 and carbon powder was employed to simultaneously regenerate nano-CaO and convert CO2 in-situ to CO.This process led to a 46 ℃ reduction in the decomposition temperature of nano-CaCO3,accompanied by an approximately 50％increase in decomposi-tion rate.The regenerated porous nano-CaO exhibited small and uniform particle size,facilitating its reuse for CO2 capture and achieving calcium looping utilization.The CO produced from the conversion of CO2 can be ap-plied in industrial syngas synthesis.Nano-CaCO3 and carbon powder offer advantages such as wide availability,low cost,high safety,and convenient transportation.The low thermal solid-solid coupling reaction holds the potential to enhance CO2 capture and utilization efficiency under the premise of low cost.
关键词
纳米CaCO3/低热固固耦合/钙循环技术/纳米CaO再生/CO2原位转化COKey words
nano-CaCO3/low thermal solid-solid coupling/calcium looping technology/regeneration of nano-CaO/in-situ conversion of CO2 to CO引用本文复制引用
出版年
2024
NETL
NSTL
万方数据