结合生物炭吸附、氨法吸收捕碳技术各自的发展潜力以及燃煤CO2减排的迫切需求，本项目提出“生物炭增效新型氨法捕碳过程的功能化交联”构想。定向调控生物炭纳孔通道的分级构筑与表面含氧/氮官能团的有序配伍，实现生物炭“吸附-反应微元”内CO2的吸附-富集、扩散-输运及游离NH3的动态固持，探究“生物炭-氨水-乙醇”体系内物质传递与溶析结晶的过程强化机制。利用实验、理论分析和计算模拟方法，解析含氧/氮基团官能化（分子原子尺度）-纳孔孔道分级化（介尺度）-生物炭/溶析结晶（微纳尺度）-吸附/吸收过程耦合（气-液-固三相）等跨尺度多相体系交联特性，探究体系内“分级吸附-高效吸收-溶析结晶-晶体再生/利用”的协同机制。通过对生物炭“吸附-反应微元对氨法捕碳过程的传质增效”和“分级官能化纳孔孔道对碳化液溶析结晶的过程强化”关键科学问题的研究，以实现“提高吸收速率-抑制氨逃逸-降低系统能耗”的氨法捕碳目标。

With the urgent need for CO2 emission reduction from coal combustion, and the development potentials of biochar adsorption and ammonia absorption on carbon capture technology, this project proposes a concept of “functionalized cross-linking of new ammonia-based carbon capture process enhanced by biochar”. Orderly distribution of biochar hierarchical micropore-meso/macropore structure and surface oxygen/nitrogen containing functional groups are regulated directionally. The adsorption-enrichment, diffusion-transportation of CO2 and the dynamic retention of free NH3 in the "adsorption-reaction microunit" of biochar are achieved. Enhancement mechanism of material transfer and dissolution crystallization in "biochar-ammonia-ethanol" system is explored. Through experimental/theoretical analysis and computational simulation, the cross-linking conversion mechanism of the multi-phase and cross-scale structures of oxygen/nitrogen-containing groups (molecular/atomic scale), hierarchical pore structures (mesoscale), biochar-crystallization (micro/nano scale) and adsorption/absorption process coupling (gas-liquid-solid three-phase) are realized. Synergistic mechanism of "staged adsorption, efficient absorption, dissolution crystallization and crystal regeneration/utilization" in the system is explored. By investigating the mechanism of “Efficiency enhancement of biochar adsorption-reaction microunitt on mass transfer of ammonia–based carbon capture” and “Processing strengthen of crystallization of carbonized solution by hierarchical functionalized nanopore channels in biochar”, which are the two critical scientific issues, it provides a foundation for achieving the multiple goals of "increasing absorption rate, inhibiting ammonia escape and reducing system energy consumption" for ammonia-based carbon capture.