Investigation on sulfation of modified Ca-based sorbent

被引：43
|
作者：
Wang, CB [1 ]
Shen, XL [1 ]
Xu, YQ [1 ]
机构：
[1] Southeast Univ, Thermal Energy Engn Res Inst, Minist Educ China, Key Lab Clean Coal Power Generat & Combust Technol, Nanjing 210096, Peoples R China
来源：
FUEL PROCESSING TECHNOLOGY | 2002年 / 79卷 / 02期
关键词：
additive; desulfurization; ions diffusion; XRD; rule;
D O I：
10.1016/S0378-3820(02)00107-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
When applied for desulfurization in coal combustion process, common Ca-based sorbents have very low Ca conversion and some additives were found can improve the sulfation effect of sorbents greatly. The sulfation characteristics and pore structure of Ca-based sorbent modified by some inorganic compound were investigated in this paper. Although the sulfur capture capability of M-CaO (calcined from modified limestone) greatly exceeds that of N-CaO (calcined from original limestone), the M-CaO sulfation phenomena cannot be explained well based only on pore structure, as has been suggested by some investigators. To find the sulfation mechanism, the crystal structure of M-CaO was measured. Based on experiments and solid-state ions diffusion theory, a new sulfation mechanism is proposed: lattice defects in M-CaO lead to higher calcium conversion. Based on this conclusion, a rule that estimates whether or not a compound can act as a Ca-based sorbent additive is suggested. (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码：121 / 133
页数：13
相关论文
共 50 条
  • [21] HCl Dry Removal with Modified Ca-Based Sorbents at Moderate to High Temperatures
    Dezhen Chen Xiongping Wang Tong Zhu Hesheng ZhangThermal and Environmental Engineering Institute
    JournalofThermalScience, 2003, (03) : 283 - 288
  • [22] HCl Dry Removal with Modified Ca-Based Sorbents at Moderate to High Temperatures
    Chen, Dezhen
    Wang, Xiongping
    Zhu, Tong
    Zhang, Hesheng
    JOURNAL OF THERMAL SCIENCE, 2003, 12 (03) : 283 - +
  • [23] How Does the Concentration of CO2 Affect Its Uptake by a Synthetic Ca-Based Solid Sorbent?
    Pacciani, R.
    Mueller, C. R.
    Davidson, J. F.
    Dennis, J. S.
    Hayhurst, A. N.
    AICHE JOURNAL, 2008, 54 (12) : 3308 - 3311
  • [24] Kinetic rate of CO2 uptake of a synthetic Ca-based sorbent: Experimental data and numerical simulations
    Rout, K. R.
    Fermoso, J.
    Chen, D.
    Jakobsen, H. A.
    FUEL, 2014, 120 : 53 - 65
  • [25] Comparative Investigation on CSMA/CA-Based Opportunistic Random Access for Internet of Things
    Tang, Chong
    Song, Lixing
    Balasubramani, Jagadeesh
    Wu, Shaoen
    Biaz, Saad
    Yang, Qing
    Wang, Honggang
    IEEE INTERNET OF THINGS JOURNAL, 2014, 1 (02): : 171 - 179
  • [26] Effects of second metal oxides on zirconia-stabilized Ca-based sorbent for sorption/catalyst integrated gasification
    Soleimanisalim, Amir H.
    Sedghkerdar, Mohamad Hashem
    Karami, Davood
    Mahinpey, Nader
    JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2017, 5 (01): : 1281 - 1288
  • [27] ELECTROCHEMICAL DURABILITY OF CA-BASED ALLOYS
    LI, ZP
    SUDA, S
    ELECTROCHIMICA ACTA, 1995, 40 (04) : 467 - 471
  • [28] Development of a novel-synthesized Ca-based CO2 sorbent for multicycle operation: Parametric study of sorption
    Angeli, Sofia D.
    Martavaltzi, Christina S.
    Lemonidou, Angeliki A.
    FUEL, 2014, 127 : 62 - 69
  • [29] Ca-based sorbent looping combustion for CO2 capture in pilot-scale dual fluidized beds
    Lu, Dennis Y.
    Hughes, Robin W.
    Anthony, Edward J.
    FUEL PROCESSING TECHNOLOGY, 2008, 89 (12) : 1386 - 1395
  • [30] Experimental investigation on sulfur transformation during coal steam gasification with Ca-based absorbent
    Ying, Chengdong
    Wang, Qinhui
    Yang, Yunjin
    Huang, Zhimin
    Zhu, Yao
    Cen, Jianmeng
    FUEL, 2023, 343
12345