本文選題：鈦鋁復(fù)合載體　切入點：金屬氧化物　出處：《北京石油化工學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：大氣污染物中SO2和NOx嚴(yán)重影響著人類的身體健康和我們的生存環(huán)境,我們應(yīng)當(dāng)尋找出防治空氣污染的有效方法來解決二氧化硫和氮氧化物污染的問題,而直接催化還原煙氣脫硫脫硝技術(shù)是在催化劑的作用下SO2和NOx與還原劑(NH3、CH4、CO等)發(fā)生還原反應(yīng)生成S單質(zhì)和N2的過程,此工藝操作簡便、易控制,還原劑的選擇具有多樣性,并且能夠達(dá)到同時脫除SO2和NOx的目的。本文為探尋同時脫硫脫硝活性較好的催化劑和較適宜的反應(yīng)條件為目的,主要做了以下工作:1、制備了M/Ti O2/γ-Al2O3(M=Ce2O3、Co3O4、Cr2O3、CuO、NiO、Fe2O3)系列催化劑,為探求活性組分的種類、活性組分的負(fù)載含量、不同的載體以及催化劑的焙燒條件等對催化劑催化還原脫硫脫硝活性的影響,并采用XRD、H2-TPR、BET、TG-MS和SEM等技術(shù)手段對催化劑進(jìn)行了晶相結(jié)構(gòu)、還原活性、比表面積、表面形貌、前驅(qū)體分解溫度等特性進(jìn)行了一系列表征,并在氣固相固定床反應(yīng)裝置上對催化劑的催化還原活性進(jìn)行了評價,結(jié)果顯示:NiO和Fe2O3為活性組分,且負(fù)載量為12%(金屬氧化物占載體質(zhì)量百分?jǐn)?shù)),載體為15%TiO2/γ-Al2O3(TiO2占載體質(zhì)量百分?jǐn)?shù)),在500℃焙燒3 h的催化劑以CO為還原劑的同時脫硫脫硝性能最好,在0.05%NO+0.10%SO2+0.30%CO(N2為載氣)的反應(yīng)氣條件下,其最高脫硫脫硝率分別96.0為%和98.6%;2、制備了多種雙金屬摻雜的TiO2/γ-Al2O3催化劑(x)Fe2O3(y)NiO/TiO2/γ-Al2O3、(x)Fe2O3(y)CuO/TiO2/γ-Al2O3、(x)NiO(y)CuO/TiO2/γ-Al2O3等,結(jié)果顯示Fe2O3和Ni O在兩者摻雜的催化劑中顯示出協(xié)同的催化作用,其中2Fe2O310NiO/TiO2/γ-Al2O3催化劑脫硝率最高可達(dá)100%,最高脫硫率在97%以上,顯示出較好脫硫脫硝活性。鐵銅和鎳銅摻雜的催化劑具有較好的同步脫硫脫硝活性,但反應(yīng)溫度較高;3、針對2Fe2O310NiO/TiO2/γ-Al2O3催化劑進(jìn)行了體積空速、反應(yīng)溫度、氧氣濃度系列因素對脫硫脫硝過程影響的考察,結(jié)果得到:空速為6000 h-1,反應(yīng)溫度500℃連續(xù)反應(yīng)時具有較好的脫硫脫硝活性,脫硝率最高可達(dá)98%,脫硫率最高可達(dá)96.6%。
[Abstract]:SO2 and NOx in air pollutants seriously affect human health and our living environment. We should find effective ways to prevent and control air pollution to solve the problem of sulfur dioxide and nitrogen oxide pollution. The technology of direct catalytic reduction of flue gas desulfurization and denitrification is a process in which SO2 and NOx reacts with reductant NH _ 3H _ 4CH _ 4CO to produce S and N _ 2 under the action of catalyst. This process is simple and easy to control, and the choice of reducing agent is diverse. In this paper, in order to find out the better catalyst for simultaneous desulphurization and denitrification and the suitable reaction conditions, the following work was done: 1, to prepare M / Ti O _ 2 / 緯 -Al _ 2O _ 3 (M / Ti) O _ 2 / 緯 -Al _ 2O _ 3 (M / Ti) O _ 2O _ 3 / 緯 -Al _ 2O _ 3 / M _ 2O _ 3CO _ 3O _ 3O _ 4C _ 2O _ 3O _ 3C _ 2O _ 3O _ 3O _ 2O _ 3O _ 2O _ 3O _ 2O _ 3O _ 2O. In order to find out the kinds of active components, the loading content of active components, the different carrier and the calcination conditions of catalysts, the effects of catalyst on catalytic reduction desulphurization and denitrification activity were investigated. The crystal structure, reduction activity, specific surface area, surface morphology, precursor decomposition temperature and other properties of the catalyst were characterized by XRDX H2-TPRB TG-MS and SEM. The catalytic reduction activity of the catalyst was evaluated in a gas-solid fixed bed reactor. The results showed that: nio and Fe2O3 were active components. And the loading amount is 12: (metal oxide / mass percent of the support, support 15TiO2 / 緯 -Al2O3TiO2.The catalyst calcined at 500 鈩，

本文編號：1596053