摘要
在色谱－微反流动法实验装置上考察了三种催化剂对ＣＯ和ＣＨ４的氧化活性，并运用ＢＥＴ、ＸＲＤ及ＴＰＲ等技术研究了Ｌａ２Ｏ３的添加对Ｃｕ－Ｏ／γ－Ａｌ２Ｏ３催化剂性能及催化剂氧化还原特性的影响．结果表明，Ｌａ２Ｏ３的添加不仅使Ｌａ２Ｏ３与ＣｕＯ之间产生相互作用，且也与载体γ－Ａｌ２Ｏ３产生相互作用；Ｌａ２Ｏ３的添加促进了ＣｕＯ在γ－Ａｌ２Ｏ３上的分散，并使ＣｕＯ均以非晶相形式存在，从而改善了Ｃｕ－Ｏ／γ－Ａｌ２Ｏ３催化剂对ＣＯ和ＣＨ４的氧化活性，还使Ｌａ－Ｃｕ－Ｏ／γ－Ａｌ２Ｏ３催化剂的ＴＰＲ峰温降低了７５℃．
Catalytic oxidation activities of carbon monoxide(CO)and methame(CH 4) were investigated in micro reactor GC system experimental unit.Effect of the addition of La 2O 3 on the catalyst performance of Cu O/γ Al 2O 3 and TPR property were studied by means of BET,XRD and TPR technique.Experimental results showed that the addition of La 2O 3 caused the interaction between not only La 2O 3 and CuO,but also La 2O 3 and γ Al 2O 3. The addition of La 2O 3 promoted the CuO monolayer dispersion over γ Al 2O 3 which was in the state of noncrystalline CuO and improved Cu O/γ Al 2O 3 catalyst for oxidation activity of CO and CH 4 ,and caused temperature of TPR peak of La Cu O/γ Al 2O 3 catalyst decreasing nearly 75℃.
出处
《科技通报》
1997年第3期148-151,共4页
Bulletin of Science and Technology
基金
浙江省科委和浙江省应用化学重点研究实验室基金
