Ca-based sorbents modified with humic acid for flue gas desulfurization
文献类型：期刊论文
| 作者 | Zhao, Rongfang; Liu, Haidi; Ye, Shufeng; Xie, Yusheng; Chen, Yunfa
|
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2006-10-11 |
| 卷号 | 45期号:21页码:7120-7125 |
| 关键词 | calcium-based sorbents so2 reactivity injection carbonate |
| ISSN号 | 0888-5885 |
| 其他题名 | Ind. Eng. Chem. Res. |
| 中文摘要 | With humic acid ( HA) as a special additive, modified Ca( OH)(2) sorbents referred to as M-Ca( OH)(2)-iHA, where i is the weight percentage of HA in the dry product and is in the range between 0 to 10, were prepared by hydrating CaO with water in which the expected amount of HA had been dissolved. The physicochemical properties of the sorbents were characterized using SEM, XRD, BET, etc., and the desulfurization activity of the sorbents, expressed as "Ca utilization", was investigated in a differential fixed-bed quartz reactor under isothermal conditions at 65 degrees C and 70% relative humidity. The experimental results indicate that both hydration treatment and HA modification play important roles in improving the microstructure and desulfurization activity of M-Ca( OH)(2)-iHA. In particular, hydration treatment is the key contribution to M-Ca( OH)(2)-0HA, whereas both factors are significant for M-Ca( OH) 2-iHA ( i) 4, 6, 8, 10). It was also found that the microstructure and desulfurization activity of M-Ca( OH)(2)-iHA improves considerably as i increases from 0 to 8 and then levels out when i increases further to 10. That is, M-Ca( OH)(2)-0HA has almost the optimal microstructure among the sorbents prepared in this study, i. e., volume mean diameter of 0.5 Am, BET surface area of 19.29 m(2)/g, and mesopore volume of 0.084 cm(3)/g, as well as the highest desulfurization activity, Ca utilization of 0.52 mol of SO2/mol of Ca. In addition, the mechanism of HA modification might be due to the acceleration effect of HA on the dissolution of lime, as well as the disturbance effect of Ca2+-HA chelates on the nucleation and growth processes of Ca( OH)(2) crystals. |
| 英文摘要 | With humic acid ( HA) as a special additive, modified Ca( OH)(2) sorbents referred to as M-Ca( OH)(2)-iHA, where i is the weight percentage of HA in the dry product and is in the range between 0 to 10, were prepared by hydrating CaO with water in which the expected amount of HA had been dissolved. The physicochemical properties of the sorbents were characterized using SEM, XRD, BET, etc., and the desulfurization activity of the sorbents, expressed as "Ca utilization", was investigated in a differential fixed-bed quartz reactor under isothermal conditions at 65 degrees C and 70% relative humidity. The experimental results indicate that both hydration treatment and HA modification play important roles in improving the microstructure and desulfurization activity of M-Ca( OH)(2)-iHA. In particular, hydration treatment is the key contribution to M-Ca( OH)(2)-0HA, whereas both factors are significant for M-Ca( OH) 2-iHA ( i) 4, 6, 8, 10). It was also found that the microstructure and desulfurization activity of M-Ca( OH)(2)-iHA improves considerably as i increases from 0 to 8 and then levels out when i increases further to 10. That is, M-Ca( OH)(2)-0HA has almost the optimal microstructure among the sorbents prepared in this study, i. e., volume mean diameter of 0.5 Am, BET surface area of 19.29 m(2)/g, and mesopore volume of 0.084 cm(3)/g, as well as the highest desulfurization activity, Ca utilization of 0.52 mol of SO2/mol of Ca. In addition, the mechanism of HA modification might be due to the acceleration effect of HA on the dissolution of lime, as well as the disturbance effect of Ca2+-HA chelates on the nucleation and growth processes of Ca( OH)(2) crystals. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CALCIUM-BASED SORBENTS ; SO2 ; REACTIVITY ; INJECTION ; CARBONATE |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000241030700033 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3933]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Jiangxi Sci & Technol Normal Univ, Jiangxi Key Lab Surface Engn, Nanchang 330013, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Rongfang,Liu, Haidi,Ye, Shufeng,et al. Ca-based sorbents modified with humic acid for flue gas desulfurization[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2006,45(21):7120-7125. |
| APA | Zhao, Rongfang,Liu, Haidi,Ye, Shufeng,Xie, Yusheng,&Chen, Yunfa.(2006).Ca-based sorbents modified with humic acid for flue gas desulfurization.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,45(21),7120-7125. |
| MLA | Zhao, Rongfang,et al."Ca-based sorbents modified with humic acid for flue gas desulfurization".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 45.21(2006):7120-7125. |
入库方式： OAI收割
来源：过程工程研究所
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