本文關(guān)鍵詞：廢FCC觸媒負載納米氧化鋅的制備及其松香催化酯化反應(yīng)的研究　出處：《高�；瘜W(xué)工程學(xué)報》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 松香 廢FCC觸媒 納米氧化鋅 催化酯化

【摘要】：以石油催化裂化(FCC)廢觸媒為載體,充分利用廢觸媒原有的分子篩結(jié)構(gòu)與L酸中心,采用溶膠-凝膠法制備非均相的負載型納米氧化鋅酯化催化劑(ZnO/FC3R);通過SEM,XRD,FT-IR和Py-IR技術(shù)對Zn O/FC3R的表面形貌、粉體與基團結(jié)構(gòu)和酸種類及酸強度進行了表征;以松香和甘油的酯化為指針反應(yīng),研究了負載量、醋酸鋅水解反應(yīng)溫度、煅燒溫度和負載時間等制備條件對催化劑酯化反應(yīng)活性的影響;考察了催化劑的失活特性。結(jié)果表明,焙燒后制得的再生FCC催化劑(FC3R)載體為Y型分子篩結(jié)構(gòu),表面積炭得到一定程度的去除,ZnO晶粒呈錐狀結(jié)構(gòu),顆粒的平均粒徑為42 nm,添加ZnO固體酸可獲得更多的L酸中心;ZnO/FC3R催化劑的適宜制備條件為:Zn O負載量為25%(wt),水解反應(yīng)溫度為35℃,煅燒溫度為500℃,負載時間為1 h,所制備的催化劑用于松香酯化反應(yīng)產(chǎn)率達96.1%,松香甘油酯產(chǎn)品的加納色度為6、酸值為6.5 mg KOH×g~(-1)、軟化點為85.3℃、殘留鋅含量為0.02%(wt),符合138#松香甘油酯國家技術(shù)指標(biāo);催化劑重復(fù)使用5次后仍具有良好的催化活性。
[Abstract]:The waste catalyst of FCC FCCs was used as the carrier to make full use of the original molecular sieve structure and L-acid center of the waste catalyst. ZnO / FC3RN catalyst was prepared by sol-gel method. The surface morphology, structure, acid species and acid strength of ZnO / FC3R were characterized by means of SEM-XRD- FT-IR and Py-IR. With the esterification of rosin and glycerol as the pointer reaction, the effects of the amount of loading, the hydrolysis temperature of zinc acetate, the calcination temperature and the loading time on the esterification activity of the catalyst were studied. The deactivation characteristics of the catalyst were investigated. The results showed that the regenerated FCC catalyst (FC3R) supported by calcination was Y-type molecular sieve structure, and the carbon deposition on the surface was removed to a certain extent. The average particle size of ZnO grain is 42 nm, and more L acid centers can be obtained by adding ZnO solid acid. The optimum conditions for preparation of ZnO/FC3R catalyst are as follows: the loading amount of Zn O is 25 鈩，

本文編號：1434382