CuO-ZnO-CrO_X-Al_2O_3催化剂前驱体组成及分解的热分析研究

Study on the Precursor Composition of CuO-ZnO-CrO_X-Al_2O_3 Catalyst and Decomposition Behavior by Thermoanalysis Method

采用热分析方法对CuO ZnO Al2 O3 和CuO ZnO CrOX Al2 O3 催化剂的前驱体进行了研究 .结果表明 ,当铬元素以硝酸铬引入时 ,Cr(NO3 ) 3 与碳酸钠反应生成Cr(OH) 3 沉淀 ,沉淀物的热分解产物为Cr2 O3 .当Cr元素采用Na2 CrO4引入时 ,沉淀物的热分解产物为CrO3 和CuO .

The precursors of CuO ZnO Al 2O 3 and CuO ZnO CrO X Al 2O 3 catalysts were studied by thermoanalysis method. The results show that the precipitate decomposition product is Cr 2O 3 when chromium element is imported by Cr(NO 3) 3 and the latter is precipitated by Na 2CO 3; when chromium element is imported by Na 2CrO 4, the precipitate decomposition product is CrO 3.