Calcium Sulfite Oxidation and Crystal Growth in the Process of Calcium Carbide Residue to Produce Gypsum

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	Calcium Sulfite Oxidation and Crystal Growth in the Process of Calcium Carbide Residue to Produce Gypsum
	Li, Yuran; Zhou, Jinting; Zhu, Tingyu; Jing, Pengfei
刊名	WASTE AND BIOMASS VALORIZATION
	2014-02-01
卷号	5 期号:1 页码:125-131
关键词	Calcium carbide residue Calcium sulfite Oxidation rate Gypsum Crystal growth
ISSN号	1877-2641
通讯作者	Zhu, TY (reprint author), Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China.
英文摘要	Calcium carbide residue mainly composed of Ca(OH)(2) can be used in wet flue gas desulfurization (FGD). Different from the traditional limestone-gypsum wet FGD, calcium carbide residue rapidly reacts with SO2 and generates numerous fine particulates. For the fine calcium sulfite particulates, the oxidation rate to CaSO4 is much lower than the sulfite formation rate, resulting in a low fraction of CaSO4 in the product and a difficult dewatering of the sludge. In order to improve the oxidation rate and the fraction of CaSO4 in the product, experiments of the calcium sulfite oxidation were conducted in a cylindrical flat-bottomed bottle placed in a water bath. The optimal oxidation reaction conditions are obtained: pH = 4.0, T = 60 degrees C. Four metal ions, Mn2+, Fe3+, Cu2+ and Co2+ are added in the slurry to improve the oxidation rate. The results show that only Mn2+ ion, or Mn2+ and Fe3+ ions together can obviously increase the oxidation rate. The products with Mn2+ and Fe3+ additives are observed as needle-like crystallites. The co-precipitation compound detected in the products indicates that the sulfite oxidation rate is relatively low for Fe3+ and Co2+ additives. Mn2+ additive is an excellent additive due to a high oxidation rate and a needle-like crystallite for the product, and can be recycled many times.
学科主题	Environmental Sciences & Ecology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	FLUE-GAS DESULFURIZATION ; PILOT-PLANT ; KINETICS ; IONS ; LIMESTONE ; CATALYST
收录类别	SCI
语种	英语
WOS记录号	WOS:000347719300014
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/15251]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Yuran,Zhou, Jinting,Zhu, Tingyu,et al. Calcium Sulfite Oxidation and Crystal Growth in the Process of Calcium Carbide Residue to Produce Gypsum[J]. WASTE AND BIOMASS VALORIZATION,2014,5(1):125-131.
APA	Li, Yuran,Zhou, Jinting,Zhu, Tingyu,&Jing, Pengfei.(2014).Calcium Sulfite Oxidation and Crystal Growth in the Process of Calcium Carbide Residue to Produce Gypsum.WASTE AND BIOMASS VALORIZATION,5(1),125-131.
MLA	Li, Yuran,et al."Calcium Sulfite Oxidation and Crystal Growth in the Process of Calcium Carbide Residue to Produce Gypsum".WASTE AND BIOMASS VALORIZATION 5.1(2014):125-131.