Growth mechanism of product layer in SO2 and NOx simultaneous removal by calcium-based sorbent

CHEN Guoqing; GAO Jihui; GAO Jianmin; WU Shaohua; QIN Yukun

doi:10.11949/j.issn.0438-1157.20141246

您当前的位置：

首页 >

文章列表页 >

Growth mechanism of product layer in SO₂ and NO_x simultaneous removal by calcium-based sorbent

更新时间：2025-12-10

- Growth mechanism of product layer in SO₂ and NO_x simultaneous removal by calcium-based sorbent
- CIESC Journal Issue 5, Pages: 1867-1873(2015)
- 作者机构：
  
  1. 国电科学技术研究院,江苏,南京,210031
  2. 哈尔滨工业大学能源科学与工程学院,黑龙江,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141246
  CLC： Q132.3+2
- Online First：05 May 2015，
  
  Published：05 May 2015
- 稿件说明：
移动端阅览
CHEN Guoqing, GAO Jihui, GAO Jianmin, et al. Growth mechanism of product layer in SO₂ and NO_x simultaneous removal by calcium-based sorbent[J]. CIESC Journal, 2015, (5): 1867-1873. DOI: 10.11949/j.issn.0438-1157.20141246.
DOI：

CHEN Guoqing, GAO Jihui, GAO Jianmin, et al. Growth mechanism of product layer in SO₂ and NO_x simultaneous removal by calcium-based sorbent[J]. CIESC Journal, 2015, (5): 1867-1873. DOI: 10.11949/j.issn.0438-1157.20141246. DOI：

摘要

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。

Abstract

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.

关键词

Keywords

references

Views

419

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Simultaneous removal of SO2 and NOx by combination of ozone oxidation and Na2S2O3 solution spray

Sequential SO2/CO2 capture using CaO-based sorbents reactivated by steam

Construction of transition metal-based nitrogen-doped carbon and their desulfurization performance

Research on the characterization of the molecular weight and its distribution of perfluoropolyether

New universal corresponding state equation for correlation and extrapolation of saturated vapor-liquid density

Related Author

YANG Ye

XU Chaoqun

ZHU Yanqun

LIN Fawei

MA Qiang

WANG Zhihua

CEN Kefa

陈鸿伟1

Related Institution

State Key Laboratory of Clean Energy Utilization, Zhejiang University

1电站设备状态监测与控制教育部重点实验室（华北电力大学）

⁰