本文主要研究内容
作者颜子金(2019)在《多级孔道SAPO-34分子筛的合成及其MTO性能研究》一文中研究指出:本文提出以廉价的糖类为硬模板剂,DEA为模版剂,水热合成法合成含有多级孔道的SAPO-34分子筛的方法,并成功合成了含有多级孔道的SAPO-34分子筛。采用X射线衍射(XRD)、N2等温吸附、扫描电镜、组成分析和NH3-TPD等对所制备的分子筛进行了表征。在固定床反应器中,研究了硅含量、晶化时间和模版剂,以及木糖、蔗糖、淀粉、葡甘聚糖和混合糖类等硬模板剂,对合成得到的多级孔道SAPO-34分子筛结构以及催化甲醇制烯烃(MTO)反应的影响。结果表明:(1)常规SAPO-34分子筛的比表面积、微孔和介孔体积分别为249.2 m2/g、0.106 cm3/g和0.006 cm3/g。以淀粉为糖类硬模板剂制备的多级孔道SAPO-34-d分子筛的比表面积、微孔和介孔体积分别为507.5 m2/g、0.241 cm3/g、0.012 cm3/g。与常规SAPO-34相比,不同糖类模板剂制备的多级孔道SAPO-34分子筛的比表面积、微孔和介孔体积均得到明显的提高。(2)多级孔道SAPO-34分子筛MTO催化寿命均比常规SAPO-34分子筛高。分子筛催化寿命从高到低顺序为SAPO-34-z>SAPO-34-h>SAPO-34-d>SAPO-34-m>SAPO-34>SAPO-34-p。(3)含多级孔道的SAPO-34分子筛的双烯选择性均高于常规SAPO-34分子筛,其中SAPO-34-m分子筛的初始双烯选择性最高,为75.4%,较常规SAPO-34分子筛71.7%高3.7%,而SAPO-34-h,SAPO-34-d,SAPO-34-z和SAPO-34-p的初始双烯选择性,比常规SAPO-34分子筛分别高3.4,2.0,1.9和0.2%,表明介孔的引入能够提高SAPO-34分子筛的初始活性。(4)硬模板剂蔗糖能够改善分子筛内部孔道结构和酸性。以蔗糖为硬模板剂得到的SAPO-34-z分子筛的初始双烯选择性相对较高,且MTO催化寿命最长(130min),较常规SAPO-34分子筛(100min)高30%(5)高硅铝合成得到的SAPO-34分子筛结晶度较高,分子筛酸性较高,低硅铝比合成得到的SAPO-34分子筛拥有相对较长的MTO催化寿命。晶化时间低于24小时无法合成纯净的SAPO-34分子筛,48h为此条件下合适的晶化时间。
Abstract
ben wen di chu yi lian jia de tang lei wei ying mo ban ji ,DEAwei mo ban ji ,shui re ge cheng fa ge cheng han you duo ji kong dao de SAPO-34fen zi shai de fang fa ,bing cheng gong ge cheng le han you duo ji kong dao de SAPO-34fen zi shai 。cai yong Xshe xian yan she (XRD)、N2deng wen xi fu 、sao miao dian jing 、zu cheng fen xi he NH3-TPDdeng dui suo zhi bei de fen zi shai jin hang le biao zheng 。zai gu ding chuang fan ying qi zhong ,yan jiu le gui han liang 、jing hua shi jian he mo ban ji ,yi ji mu tang 、zhe tang 、dian fen 、pu gan ju tang he hun ge tang lei deng ying mo ban ji ,dui ge cheng de dao de duo ji kong dao SAPO-34fen zi shai jie gou yi ji cui hua jia chun zhi xi ting (MTO)fan ying de ying xiang 。jie guo biao ming :(1)chang gui SAPO-34fen zi shai de bi biao mian ji 、wei kong he jie kong ti ji fen bie wei 249.2 m2/g、0.106 cm3/ghe 0.006 cm3/g。yi dian fen wei tang lei ying mo ban ji zhi bei de duo ji kong dao SAPO-34-dfen zi shai de bi biao mian ji 、wei kong he jie kong ti ji fen bie wei 507.5 m2/g、0.241 cm3/g、0.012 cm3/g。yu chang gui SAPO-34xiang bi ,bu tong tang lei mo ban ji zhi bei de duo ji kong dao SAPO-34fen zi shai de bi biao mian ji 、wei kong he jie kong ti ji jun de dao ming xian de di gao 。(2)duo ji kong dao SAPO-34fen zi shai MTOcui hua shou ming jun bi chang gui SAPO-34fen zi shai gao 。fen zi shai cui hua shou ming cong gao dao di shun xu wei SAPO-34-z>SAPO-34-h>SAPO-34-d>SAPO-34-m>SAPO-34>SAPO-34-p。(3)han duo ji kong dao de SAPO-34fen zi shai de shuang xi shua ze xing jun gao yu chang gui SAPO-34fen zi shai ,ji zhong SAPO-34-mfen zi shai de chu shi shuang xi shua ze xing zui gao ,wei 75.4%,jiao chang gui SAPO-34fen zi shai 71.7%gao 3.7%,er SAPO-34-h,SAPO-34-d,SAPO-34-zhe SAPO-34-pde chu shi shuang xi shua ze xing ,bi chang gui SAPO-34fen zi shai fen bie gao 3.4,2.0,1.9he 0.2%,biao ming jie kong de yin ru neng gou di gao SAPO-34fen zi shai de chu shi huo xing 。(4)ying mo ban ji zhe tang neng gou gai shan fen zi shai nei bu kong dao jie gou he suan xing 。yi zhe tang wei ying mo ban ji de dao de SAPO-34-zfen zi shai de chu shi shuang xi shua ze xing xiang dui jiao gao ,ju MTOcui hua shou ming zui chang (130min),jiao chang gui SAPO-34fen zi shai (100min)gao 30%(5)gao gui lv ge cheng de dao de SAPO-34fen zi shai jie jing du jiao gao ,fen zi shai suan xing jiao gao ,di gui lv bi ge cheng de dao de SAPO-34fen zi shai yong you xiang dui jiao chang de MTOcui hua shou ming 。jing hua shi jian di yu 24xiao shi mo fa ge cheng chun jing de SAPO-34fen zi shai ,48hwei ci tiao jian xia ge kuo de jing hua shi jian 。
论文参考文献
论文详细介绍
论文作者分别是来自东北石油大学的颜子金,发表于刊物东北石油大学2019-07-15论文,是一篇关于甲醇论文,烯烃论文,多级孔论文,硬模板剂论文,东北石油大学2019-07-15论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自东北石油大学2019-07-15论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:甲醇论文; 烯烃论文; 多级孔论文; 硬模板剂论文; 东北石油大学2019-07-15论文;