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SO_2 gas adsorption by modified kaolin clays: Influence of previous heating and time acid treatments

机译:改性高岭土吸附SO_2气体:先前加热和时间酸处理的影响

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CETMIC (Centro de Tecnologia de Recursos Minerales y Cerdmica), CONICET La Plata-CICPBA, C.C. 49, Cno. Centenario y 506, (1897) M.B. Connet, Prov. Buenos Aires, Argentina;CETMIC (Centro de Tecnologia de Recursos Minerales y Cerdmica), CONICET La Plata-CICPBA, C.C. 49, Cno. Centenario y 506, (1897) M.B. Connet, Prov. Buenos Aires, Argentina;%Modified kaolin days were used as adsorbents for SO_2 gas adsorptions. The clays were heated up to 900 °C previous to acid treatments with 0.5 N sulfuric acid solutions at boiling temperature during different times up to 1440 min. Equilibrium adsorption at 25 °C and 0.1 MPa was carried out by using a volumetric apparatus. The samples were characterized by chemical analysis, X-ray diffraction and infrared analysis. The heating of the clays followed by acid treatment improved the adsorption capacity of the kaolin clays. The presence of amorphous silica and hydroxyl in the final products improved SO2 adsorption capacity. Better properties for SO2 adsorption were found in kaolin rich in not well ordered kaolinite clay mineral.
机译:CETMIC(Centro de Tecnologia de Recursos Minerales y Cerdmica),CONICET拉普拉塔-CICPBA,C.C。 49,Cno。 Centenario y 506,(1897)M.B.康奈省阿根廷布宜诺斯艾利斯; CETMIC(Centro de Tecnologia de Recursos Minerales y Cerdmica),CONICET La Plata-CICPBA,C.C. 49,Cno。 Centenario y 506,(1897)M.B.康奈省阿根廷布宜诺斯艾利斯;%改性高岭土天数用作SO_2气体吸附的吸附剂。将粘土加热至900°C,然后在1440分钟内的不同时间内,在沸腾温度下用0.5 N硫酸溶液进行酸处理。通过使用体积仪在25℃和0.1MPa下进行平衡吸附。通过化学分析,X射线衍射和红外分析对样品进行表征。加热粘土,然后进行酸处理,提高了高岭土的吸附能力。最终产物中无定形二氧化硅和羟基的存在提高了SO2的吸附能力。在富含无序高岭石粘土矿物的高岭土中发现了更好的SO2吸附性能。

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