标题：Synthesis of alpha hemihydrate particles with lithium and carboxylates via the hydrothermal method

作者：Wang, XS (Wang, Xiaoshu); Zhou, M (Zhou, Min); Ke, X (Ke, Xing); Tan, RQ (Tan, Ruiqi); Chen, YC (Chen, Yuchi); Hou, HB (Hou, Haobo)

来源出版物：POWDER TECHNOLOGY卷：317页码：293-300 DOI：10.1016/j.powtec.2017.03.008 出版年：JUL 15 2017

摘要：The hydrothermal method is efficient in synthesizing alpha calcium sulfate hemihydrate (alpha-CSH) particles from flue gas desulfurization gypsum. This study investigates the effects of LiCl center dot H2O solution with different carboxylates on the conversion process. Under optimal operating conditions, hexahedral column shaped crystals are obtained to verify the feasibility of this process. Results reveal that carboxylates especially disodium ethylenediamine tetraacetate (EDTA disodium) in conjunction with LiCl influences crystal morphology and nucleation. A fairly concentrated LiCl center dot H2O solution (over 2 M) with EDTA disodium (over 0.01 M) shortens reaction time and reduces particle size. Each crystal plane presents a balanced growth rate to create column objects because of the complexation reaction between EDTA disodium and calcium ions. The results of X-ray diffraction coupled with thermogravimetry and differential scanning calorimetry confirm that a-CSH is the only product.

入藏号：WOS:000404492600033

文献类型：Article

语种：English

作者关键词： Alpha hemihydrate particle; Lithium chloride; Solubility; Crystal modification

扩展关键词： CALCIUM-SULFATE HEMIHYDRATE; GAS DESULFURIZATION GYPSUM; CONCENTRATED CACL2 SOLUTION; TRANSFORMATION KINETICS; ATMOSPHERIC-PRESSURE; CRYSTAL-STRUCTURE; SALT-SOLUTION; FGD GYPSUM; SOLUBILITY; MORPHOLOGY

通讯作者地址：Hou, HB (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址：Hou, HB (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

地址： [Wang, Xiaoshu; Zhou, Min; Ke, Xing; Tan, Ruiqi; Chen, Yuchi; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

研究方向：Engineering, Chemical

ISSN：0032-5910

eISSN: 1873-328X

影响因子：2.942