用氟硅酸铵对HMCM-22分子筛进行了改性处理,并采用氨程序升温脱附和吡啶吸附红外光谱法测定了其酸性.结果表明,随着氟硅酸铵处理温度的提高, HMCM-22分子筛的B酸和L酸中心的酸量均逐渐减少.以氟硅酸铵改性的HMCM-22分子筛为甲醇脱水活性组分与铜基甲醇合成活性组分(CuO-ZnO-Al2O3)组成双功能催化剂,在连续流动加压固定床反应器上考察了其对合成气直接制二甲醚反应的催化性能.结果表明,对HMCM-22分子筛在适当温度(45 ℃)下进行氟硅酸铵改性,可使反应产物中烃类和CO2副产物的选择性下降,使目的产物二甲醚的选择性显著升高.当氟硅酸铵处理温度过高(85 ℃)时, CO的转化率和二甲醚的选择性均大幅度降低.
参考文献
| [1] | 高志华,黄伟,郝利峰,谢克昌.浆态床用CuO/ZrO2催化剂的完全液相法合成及其对CO加氢的催化性能[J].催化学报,2006(01):86-90. |
| [2] | Mao D S;Yang W M;Xia J Ch;Zhang B Lu G Zh .[J].Journal of Molecular Catalysis A:Chemical,2006,250(1/2):138. |
| [3] | Xia J Ch;Mao D S;Zhang B;Chen Q L Zhang Y H Tang Y .[J].Catalysis Communications,2006,7(06):362. |
| [4] | Fei JH;Hou ZY;Zhu B;Lou H;Zheng XM .Synthesis of dimethyl ether (DME) on modified HY zeolite and modified HY zeolite-supported Cu-Mn-Zn catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(1):49-54. |
| [5] | Luan Y Sh;Xu H Y;Yu Ch Y;Li W Zh Hou Sh F .[J].Catalysis Letters,2007,115(1/2):23. |
| [6] | Aguayo AT;Erena J;Mier D;Arandes JM;Olazar M;Bilbao J .Kinetic modeling of dimethyl ether synthesis in a single step on a CuO-ZnO-Al2O3/gamma-Al2O3 catalyst[J].Industrial & Engineering Chemistry Research,2007(17):5522-5530. |
| [7] | Moradi G R;Nosrati S;Yaripor F .[J].Catalysis Communications,2007,8(03):598. |
| [8] | 许庆利,李庭琛,张素平,任铮伟,颜涌捷.固体酸脱水剂表面酸性对一步法合成二甲醚的影响[J].过程工程学报,2007(05):905-909. |
| [9] | Bae J W;Potdar H S;Kang S H;Jun K W .[J].Energy and Fuels,2008,22(01):223. |
| [10] | 夏建超,毛东森,陈庆龄,唐颐.合成气一步法制二甲醚双功能催化剂的研究进展[J].石油化工,2004(08):788-794. |
| [11] | Xia J Ch;Mao D S;Zhang B;Chen Q L Tang Y .[J].Catalysis Letters,2004,98(04):235. |
| [12] | Mao D S;Yang W M;Xia J Ch;Zhang B Song Q Y Chen Q L .[J].Journal of Catalysis,2005,230(01):140. |
| [13] | Wang L G;Qi Y;Wei Y X;Fang D R Meng S H Liu Z M .[J].Catalysis Letters,2006,106(1/2):61. |
| [14] | Yoo K S;Kim J H;Park M J;Kim S J Joo O S Jung K D .[J].Applied Catalysis A:General,2007,330(01):57. |
| [15] | Xia J Ch;Mao D S;Xu N;Chen Q L Zhang Y H Tang Y .[J].Chemistry Letters,2004,33(11):1456. |
| [16] | 刘志城,沈绍典,田博之,孙锦玉,屠波,赵东元.高硅沸石MCM-22的静态法合成[J].科学通报,2004(04):325-330. |
| [17] | Xia J Ch;Mao D S;Tao W C;Chen Q L Zhang Y H Tang Y .[J].Microporous and Mesoporous Materials,2006,91(1/3):33. |
| [18] | Triantafillidis C S;Vlessidis A G;Evmiridis N P .[J].Industrial and Engineering Chemistry Research,2000,39(02):307. |
| [19] | Kumar S.;Hegde SG.;Sivasanker S.;Sinha AK. .Influence of mild dealumination on physicochemical, acidic and catalytic properties of H-ZSM-5[J].Journal of molecular catalysis, A. Chemical,2000(1/2):115-120. |
| [20] | Triantafillidis C S;Vlessidis A G;Nalbandian L;Evmiridis N P .[J].Microporous and Mesoporous Materials,2001,47(2/3):369. |
| [21] | 赵国良,滕加伟,谢在库,唐颐,杨为民,陈庆龄.氟硅酸铵改性的HZSM-5催化剂的表征及其碳四烯烃裂解催化性能[J].催化学报,2005(12):1083-1087. |
| [22] | Zhu X X;Liu S L;Song Y Q;Xu L Y .[J].Catalysis Communications,2005,6(11):742. |
| [23] | Jiang S;Hwang YK;Jhung SH;Chang JS;Hwang JS;Cai TX;Park SE .Zeolite SUZ-4 as selective dehydration catalyst for methanol conversion to dimethyl ether[J].Chemistry Letters,2004(8):1048-1049. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%