以六水氯化铝为前驱体,硅酸钠为支撑体,间苯三甲酸钠为交联剂,磷酸为催化剂,氨基戊二酸钠为缓冲剂,通过溶胶凝胶法和常压干燥法制备了制备得到高比表面积、低密度的块状有机铝-SiO2型类气凝胶催化剂。通过SU70型扫描电子显微镜、Autosor...以六水氯化铝为前驱体,硅酸钠为支撑体,间苯三甲酸钠为交联剂,磷酸为催化剂,氨基戊二酸钠为缓冲剂,通过溶胶凝胶法和常压干燥法制备了制备得到高比表面积、低密度的块状有机铝-SiO2型类气凝胶催化剂。通过SU70型扫描电子显微镜、Autosorb-iQ全自动比表面和孔径分布分析仪、FTIR-650S傅里叶变换红外光谱仪等仪器测定了本催化剂的微观结构、孔洞类型以及化学键及其官能团。对比了三氧化二铝与有机铝-SiO2型类气凝胶催化合成二甲醚的催化性能,得出有机铝-SiO2型类气凝胶催化剂可提高5%~7%的甲醇转化率。Taking aluminium chloride hexahydrate as precursor, sodium silicate as carrier, sodium iso- phthalate as cross-linking agent, phosphoric acid as catalyst and sodium aminoglutarate as buffer, bulk organic silicon dioxide aerogel-like catalysts with high specific surface area and low density were prepared by sol-gel method and atmospheric pressure drying method. The microstructures, pore types, chemical bonds and functional groups of the catalysts were determined by SU70 Scanning electron microscope, Autosorb-iQ automatic surface and pore size analyzer and FTIR-650S Fourier transform infrared spectrometer. The catalytic properties of alumina and organoaluminium-silicon dioxide aerogels for the synthesis of dimethyl ether were compared. The results show that the conversion of methanol can be increased by 5%~7% over the organosilicon aerogel catalyst.展开更多
本文研究了有机铝-SiO2型类气凝胶催化剂基材制备的原料配比与催化剂基材成型度之间的关系,分析了该催化剂基材的结构特征,并探讨了不同配方制备的催化剂基材对有机物的吸附特征。结果表明,原料中对催化剂基材成型的主要影响因素为氯化...本文研究了有机铝-SiO2型类气凝胶催化剂基材制备的原料配比与催化剂基材成型度之间的关系,分析了该催化剂基材的结构特征,并探讨了不同配方制备的催化剂基材对有机物的吸附特征。结果表明,原料中对催化剂基材成型的主要影响因素为氯化铝与间苯三甲酸钠,次要影响因素为硅酸钠量。最佳成型配比为氯化铝2.41 g/100 mL (H2O),硅酸钠3.66 g/100 mL (H2O),间苯甲酸钠2.84 g/100 mL (H2O)。该催化剂基材呈现较明显的絮状、多孔的三维结构,并且对亚麻油的吸附量为3021 mg/g。另外,当间苯三甲酸钠浓度在2.1~2.7 g/100 mL (H2O)范围内,硅铝加入量在21~63 mL范围内生成的催化剂基材有较好的有机物吸收性能。The relationship between the ratio of raw materials and the molding degree of the Organic Al-SiO2 aerogel catalyst substrate was studied, and the structural characteristics of the catalyst substrate were analyzed, its additive property to linseed oil was studied. The results show that the main factors affecting the forming of catalyst substrate are aluminum chloride and sodium isophthalate, and the secondary factors are sodium silicate. The best molding ratio was aluminum chloride 2.41 g/100 mL (H2O), sodium silicate 3.66 g/100 mL (H2O), sodium isobenzoate 2.84 g/100 mL (H2O). The catalyst has a three-dimensional structure of flocculation and porosity, and the adsorption capacity of linseed oil is 3021 mg/g. In addition, when the concentration of sodium isophthalate is in the range of 2.1~2.7 g/100 mL (H2O) and the addition of Si-Al is in the range of 21 mL ~ 63 mL, the catalyst substrate has good organic absorption performance.展开更多
文摘以六水氯化铝为前驱体,硅酸钠为支撑体,间苯三甲酸钠为交联剂,磷酸为催化剂,氨基戊二酸钠为缓冲剂,通过溶胶凝胶法和常压干燥法制备了制备得到高比表面积、低密度的块状有机铝-SiO2型类气凝胶催化剂。通过SU70型扫描电子显微镜、Autosorb-iQ全自动比表面和孔径分布分析仪、FTIR-650S傅里叶变换红外光谱仪等仪器测定了本催化剂的微观结构、孔洞类型以及化学键及其官能团。对比了三氧化二铝与有机铝-SiO2型类气凝胶催化合成二甲醚的催化性能,得出有机铝-SiO2型类气凝胶催化剂可提高5%~7%的甲醇转化率。Taking aluminium chloride hexahydrate as precursor, sodium silicate as carrier, sodium iso- phthalate as cross-linking agent, phosphoric acid as catalyst and sodium aminoglutarate as buffer, bulk organic silicon dioxide aerogel-like catalysts with high specific surface area and low density were prepared by sol-gel method and atmospheric pressure drying method. The microstructures, pore types, chemical bonds and functional groups of the catalysts were determined by SU70 Scanning electron microscope, Autosorb-iQ automatic surface and pore size analyzer and FTIR-650S Fourier transform infrared spectrometer. The catalytic properties of alumina and organoaluminium-silicon dioxide aerogels for the synthesis of dimethyl ether were compared. The results show that the conversion of methanol can be increased by 5%~7% over the organosilicon aerogel catalyst.
文摘本文研究了有机铝-SiO2型类气凝胶催化剂基材制备的原料配比与催化剂基材成型度之间的关系,分析了该催化剂基材的结构特征,并探讨了不同配方制备的催化剂基材对有机物的吸附特征。结果表明,原料中对催化剂基材成型的主要影响因素为氯化铝与间苯三甲酸钠,次要影响因素为硅酸钠量。最佳成型配比为氯化铝2.41 g/100 mL (H2O),硅酸钠3.66 g/100 mL (H2O),间苯甲酸钠2.84 g/100 mL (H2O)。该催化剂基材呈现较明显的絮状、多孔的三维结构,并且对亚麻油的吸附量为3021 mg/g。另外,当间苯三甲酸钠浓度在2.1~2.7 g/100 mL (H2O)范围内,硅铝加入量在21~63 mL范围内生成的催化剂基材有较好的有机物吸收性能。The relationship between the ratio of raw materials and the molding degree of the Organic Al-SiO2 aerogel catalyst substrate was studied, and the structural characteristics of the catalyst substrate were analyzed, its additive property to linseed oil was studied. The results show that the main factors affecting the forming of catalyst substrate are aluminum chloride and sodium isophthalate, and the secondary factors are sodium silicate. The best molding ratio was aluminum chloride 2.41 g/100 mL (H2O), sodium silicate 3.66 g/100 mL (H2O), sodium isobenzoate 2.84 g/100 mL (H2O). The catalyst has a three-dimensional structure of flocculation and porosity, and the adsorption capacity of linseed oil is 3021 mg/g. In addition, when the concentration of sodium isophthalate is in the range of 2.1~2.7 g/100 mL (H2O) and the addition of Si-Al is in the range of 21 mL ~ 63 mL, the catalyst substrate has good organic absorption performance.
