Utilization of oil shale ash to prepare PCC: leachibility dynamics and equilibrium in the ash-water system

被引：19
作者：
Velts, O. [1 ]
Uibu, M. [1 ]
Rudjak, I. [1 ]
Kallas, J. [2 ]
Kuusik, R. [1 ]
机构：
[1] Tallinn Univ Technol, Lab Inorgan Mat, 5 Ehitajate Str, EE-19086 Tallinn, Estonia
[2] Lappeenranta Univ Technol, Lab Separat Technol, Lappeenranta 53851, Finland
来源：
GREENHOUSE GAS CONTROL TECHNOLOGIES 9 | 2009年 / 1卷 / 01期
关键词：
Oil shale ash; solid waste; precipitated calcium carbonate; Ca2+-ions; mineralization; leachibility; equilibrium; dynamics; CARBON-DIOXIDE BINDING; COMBUSTION;
D O I：
10.1016/j.egypro.2009.02.312
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In current study the oil shale ash consisting free lime have been considered as a source of Ca in the precipitated calcium carbonate (PCC) production. In connection with this approach, a set of laboratory experiments was carried out in order to investigate the leach ibility dynamics and equilibrium of the main ions from oil shale ashes formed in boilers operating with different combustion technologies. The main characteristics of Ca distribution between phases have been established using different ash/water suspension ratios and diffusioncoefficients determined. The effect of temperature on the Ca2+ equilibrium concentration was investigated. Data collected served as basis for modeling of the equilibrium and dynamics of leaching of Ca2+ ions.
引用
收藏
页码：4843 / 4850
页数：8
相关论文
共 11 条
  • [1] Cooney D.O., 1998, ADSORPTION DESIGN WA
  • [2] Kaasik M, 2005, OIL SHALE, V22, P547
  • [3] Kuusik R, 2005, OIL SHALE, V22, P407
  • [4] Kuusik R, 2002, OIL SHALE, V19, P277
  • [5] Kuusik R, 2001, OIL SHALE, V18, P109
  • [6] *NARV POW, 2001, ENV ISS ASS NARV POW
  • [7] Oates J.A. H., 1998, LIME LIMESTONE CHEM
  • [8] Ots A., 2006, Oil Shale Fuel Combustion
  • [9] PUNNING JM, 1996, I ECOLOGY PUBLICATIO, V4, P26
  • [10] ROOS I, 2007, GREENHOUSE GAS EMISS
12