Specific Adsorption of Coal-cleaning Bacterium onto Pyrite and/or Sporenite and Desulfurization of Coal.

黄铁矿和/或孢子体上洗煤细菌的特异性吸附和煤脱硫。

• 批准号: 05680479
• 负责人: KOIZUMI Junichi
• 金额: $ 1.34万
• 依托单位: The National University of Yokohama (1994)The University of Tokyo (1993)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05680479/
• 关键词: Coal; Biological Desulfurization; Thiobacillus; Pyrite; Adsorption; Floating Separation; Illinois Coal; Tenfu Coal; 脱硫

Although the desulfurization and leaching of coal by the use of pyrite-oxidizing activity of Thiobacillus ferrooxidans needed more than 2 weeks, while a new technology required only several minutes, the principle of which was hydrophorbisity change of pyrite particles adsorbed by the bacterium. After fining of coal (<100,100-200, <200 mesh) , the coal pulp was mixed with the bacterial suspension. The bacterial cells was specifically adsorbed onto only pyrite particles originated from coal and the surface energy of the particles were changed from hydrophorbic to hydrophilic state. A Floating column constructed in this study could separate the pyrite particles of which surface was changed to hydrophilic from the coal pulp mixuture. The separation was investigated through changing several conditions such as bacterial dosage, detergent concentration, coal species, etc. The measurements of desulfurization and carbon recovery gave the optimum operation and/or pulp condition, and the operation point for Illnois coal was different from that for Tenfu (Chinese) coal. The particle size distribution was most influenced the optimum operation point.

虽然利用氧化亚铁硫杆菌的黄铁矿氧化活性对煤进行脱硫和浸出需要2周以上的时间，但新技术只需要几分钟，其原理是细菌吸附的黄铁矿颗粒的疏水性改变。将煤(100目、100目-200目、200目)粉碎后，将煤浆与细菌悬浮液混合。细菌细胞只专一性地吸附在煤中的黄铁矿颗粒上，颗粒的表面能由亲水变为亲水。本研究构建的浮选柱可以将表面亲水性的黄铁矿颗粒从煤浆混合物中分离出来。通过改变菌剂投加量、洗涤剂浓度、煤种等条件对分选进行了考察，通过对脱硫和碳回收的测定，得出了最佳的操作条件和/或纸浆条件，伊尔诺伊斯煤的操作点与中国天府煤不同。最佳操作点对粒度分布的影响最大。