發(fā)布時間：2018-12-08 17:00

【摘要】：以青霉素菌渣(PMW)和土霉素菌渣(TMW)為對象,在水平管式反應(yīng)器中進行快速熱解,采用X射線光電子能譜(XPS)表征和化學(xué)吸收-分光光度定量分析方法,研究了抗生素菌渣熱解N官能團變化特征及其與NO_x前驅(qū)物的關(guān)系。結(jié)果表明,菌渣燃料N官能團分為無機N(N-IN)和蛋白質(zhì)及其水解產(chǎn)物N(N-A)兩種。決定菌渣NO_x前驅(qū)物以NH_3-N為主,N官能團主要為N-A,PMW占81.1%、TMW占59.0%。在低溫區(qū)間,N-IN在150-250℃分解和N-A在250-450℃轉(zhuǎn)化,為NH3-N主要來源;PM W和TM W產(chǎn)率分別為20.9%和25.6%,而HCN-N產(chǎn)率小于2%,基本與燃料N官能團特征無關(guān);該階段伴隨吡啶N(N-6)和吡咯N(N-5)的生成及轉(zhuǎn)化,峰值在350-400℃。在高溫區(qū)間,半焦N反應(yīng),主要是N-6和N-5的轉(zhuǎn)化,為NH_3-N和部分HCN-N的來源;該階段伴隨少量更穩(wěn)定質(zhì)子化吡啶N(N-Q)和氮氧化物N(N-X)生成。由于N-IN和不穩(wěn)定N-A低溫下會快速分解,250-300℃下菌渣半焦N去除高達40%、能量損失可控制在25%,因此,采用合適低溫熱解處理菌渣,在保證能量前提下可有效去除燃料中的N。
[Abstract]:Rapid pyrolysis of penicillin residue (PMW) and oxytetracycline residue (TMW) was carried out in a horizontal tube reactor. X-ray photoelectron spectroscopy (XPS) characterization and chemical absorption-spectrophotometric analysis were used. The characteristics of N functional groups in pyrolysis of antibiotic residue and their relationship with NO_x precursors were studied. The results showed that the N functional groups of microbial residue fuel could be divided into inorganic N (N-IN) and protein and its hydrolyzed product N (N-A). NH_3-N was the main precursor of determining bacteria residue NO_x, and N-A1PMW accounted for 81.1% and 59.0% for N functional group. In the low temperature range, N-IN decomposes at 150-250 鈩，

本文編號：2368683