抗生素菌渣热解N官能团变化特征及其与NO_x前驱物关系研究
发布时间：2018-12-08 17:00
【摘要】：以青霉素菌渣(PMW)和土霉素菌渣(TMW)为对象,在水平管式反应器中进行快速热解,采用X射线光电子能谱(XPS)表征和化学吸收-分光光度定量分析方法,研究了抗生素菌渣热解N官能团变化特征及其与NO_x前驱物的关系。结果表明,菌渣燃料N官能团分为无机N(N-IN)和蛋白质及其水解产物N(N-A)两种。决定菌渣NO_x前驱物以NH_3-N为主,N官能团主要为N-A,PMW占81.1%、TMW占59.0%。在低温区间,N-IN在150-250℃分解和N-A在250-450℃转化,为NH3-N主要来源;PM W和TM W产率分别为20.9%和25.6%,而HCN-N产率小于2%,基本与燃料N官能团特征无关;该阶段伴随吡啶N(N-6)和吡咯N(N-5)的生成及转化,峰值在350-400℃。在高温区间,半焦N反应,主要是N-6和N-5的转化,为NH_3-N和部分HCN-N的来源;该阶段伴随少量更稳定质子化吡啶N(N-Q)和氮氧化物N(N-X)生成。由于N-IN和不稳定N-A低温下会快速分解,250-300℃下菌渣半焦N去除高达40%、能量损失可控制在25%,因此,采用合适低温热解处理菌渣,在保证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，
本文编号：2368683
[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，
本文编号：2368683
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