CAJ | 학술논문

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V2 O5/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 3000)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V2 O5负载量的V2 O5/FA-BT催化剂在低温下有很好的脱硝效果,其中以V2 O5负载量(质量分数)为11%的V2 O5/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,CH3 COOH酸改的催化剂比表面积较大且脱硝效果最好。
목전,아국전엄보편채용SCR법고함진공예대연기중적NOx진행탈초,최화제존재엄중도새、중독등문제,SCR법저함진공예월래월인기중시。위료제비SCR법저함진공예중적저온SCR탈초최화제,본문장범양화물부재재분매회화팽윤토혼합제성적복합재료재체상,제성V2 O5/FA-BT최화제,동시분별용전자동비표면급공극도분석의(Micromeritics Tristar 3000)화소묘전자현미전경(SEM)대최화제적비표면적화표면형모진행표정。결과표명：불동V2 O5부재량적V2 O5/FA-BT최화제재저온하유흔호적탈초효과,기중이V2 O5부재량(질량분수)위11%적V2 O5/FA-BT탈초효과최호,당반응온도위130℃시,탈초솔체도89%；대최화제진행산개,CH3 COOH산개적최화제비표면적교대차탈초효과최호。
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-tempera-ture SCR denitration catalyst,in this study,vanadium oxide was loaded in composite material carriers making of fly ash and bentonite to make V2 O5/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 TriStar 3000 ) and scanning electron microscopy ( SEM ) . The results show that the different V2 O5 loading of V2 O5/FA-BT catalysts at lowtemperature had good denitration effect, among which V2 O5 loading ( mass fraction) of 11% V2 O5/FA-BT had best denitration rate of 89% at 130℃. Acid modifica-tion was carried out on the carrier. CH3 COOH acid-modified catalyst had larger specific surface area and best denitration effect.