摘要
目前,我国电厂普遍采用SCR法高含尘工艺对烟气中的NOx进行脱硝,催化剂存在严重堵塞、中毒等问题,SCR法低含尘工艺越来越引起重视。为了制备SCR法低含尘工艺中的低温SCR脱硝催化剂,本文将钒氧化物负载在粉煤灰和膨润土混合制成的复合材料载体上,制成V2O5/FA-BT催化剂,同时分别用全自动比表面及孔隙度分析仪(Micromeritics Tristar 3 000)和扫描电子显微电镜(SEM)对催化剂的比表面积和表面形貌进行表征。结果表明:不同V2O5负载量的V2O5/FA-BT催化剂在低温下有很好的脱硝效果,其中以V2O5负载量(质量分数)为11%的V2O5/FA-BT脱硝效果最好,当反应温度为130℃时,脱硝率达到89%;对催化剂进行酸改,CH3COOH酸改的催化剂比表面积较大且脱硝效果最好。
At present,SCR method of high dust technology to remove NOx in flue gas is widely used in China＇s power plants,however,there are many problems affecting catalysts,like serious jaming,poisoning,and so on such reasons making SCR method of low dust technology become hot issue. In order to synthesize low-temperature SCR denitration catalyst,in this study,vanadium oxide was loaded in composite material carriers making of fly ash and bentonite to make V2O5/ FA-BT catalyst. At the same time the specific surface area and surface morphology of the catalysts were respectively characterized by automatic specific surface and porosity analyzer apparatus（ Micromeritics Tri Star 3000） and scanning electron microscopy（ SEM）. The results show that the different V2O5 loading of V2O5/ FA-BT catalysts at lowtemperature had good denitration effect,among which V2O5loading（ mass fraction） of 11% V2O5/ FA-BT had best denitration rate of 89% at 130℃. Acid modification was carried out on the carrier. CH3 COOH acid-modified catalyst had larger specific surface area and best denitration effect.
出处
《东北电力大学学报》
2015年第3期59-63,共5页
Journal of Northeast Electric Power University
关键词
SCR
粉煤灰
膨润土
酸改
SCR
Fly ash
Bentonite
Acid modification
作者简介
施云芬（1964-），女，吉林省吉林市人，东北电力大学化学工程学院教授，主要研究方向：环境污染治理．．
