CAJ | 학술논문

为了分析钙基吸收剂硫氮协同脱除过程中产物层的生长机制，采用氢氧化钙单晶体表面（0001）模拟吸收剂孔隙的孔壁及外表面，针对脱硫、脱硝及硫氮协同脱除过程中产物层的生长规律进行了分析，结合晶体生长理论及脱硫和脱硝过程中产物层生长的差异，提出了硫氮协同脱除过程中产物层生长的机制。研究结果表明，脱硫反应首先发生在单晶表面局部区域，并使该区域膨胀形成颗粒状凸起结构；之后，随着反应区域不断扩大，表面膨胀趋于一致，从而形成连续致密产物层。由于脱硝产物易溶于水，且在液膜中扩散，因此脱硝反应对单晶表面表现出刻蚀作用。硫氮协同脱除过程中，脱硝反应的刻蚀作用抑制了脱硫连续致密产物层的形成，同时，液膜中脱硝产物的出现也改变了脱硫产物的生长习性，因此反应后产物层为疏松结构。
위료분석개기흡수제류담협동탈제과정중산물층적생장궤제，채용경양화개단정체표면（0001）모의흡수제공극적공벽급외표면，침대탈류、탈초급류담협동탈제과정중산물층적생장규률진행료분석，결합정체생장이론급탈류화탈초과정중산물층생장적차이，제출료류담협동탈제과정중산물층생장적궤제。연구결과표명，탈류반응수선발생재단정표면국부구역，병사해구역팽창형성과립상철기결구；지후，수착반응구역불단확대，표면팽창추우일치，종이형성련속치밀산물층。유우탈초산물역용우수，차재액막중확산，인차탈초반응대단정표면표현출각식작용。류담협동탈제과정중，탈초반응적각식작용억제료탈류련속치밀산물층적형성，동시，액막중탈초산물적출현야개변료탈류산물적생장습성，인차반응후산물층위소송결구。
In order to analyze the growth mechanism of product layer in SO2 and NOx removal by calcium-based sorbent, the single-crystal Ca(OH)2(0001) surface was used to simulate the pore wall and external surface of the sorbent. The growth of product layer was analyzed under different reaction environments. The growth mechanism of product layer in SO2 and NOx simultaneous removal by calcium-based sorbent was proposed, combining crystal growth theory and discrepancy between SO2 and NOx single removal. SO2 removal reaction firstly occurred in the local area of the single-crystal surface to result in expansion of surface and formation of convex structure. Subsequently, the reaction and expansion area gradually extended, which led to formation of the continuous dense product layer. Due to solubility and diffusion of NO2 removal product in the water film, NO2 reaction had an obvious etching effect on the sorbent surface. When SO2 removal reaction coexisted with NO2 removal reaction, the etching action of NO2 removal reaction could inhibit formation of the continuous dense SO2 removal product layer. Meanwhile, the presence of NO2 removal product could change the growth habit of the SO2 removal product. Therefore, the sorbent surface structure after simultaneously reacting with SO2 and NOx was loose.