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化工学报  2015 

碱金属改性对SAPO-34分子筛催化性能的影响

DOI: 10.11949/j.issn.0438-1157.20141741, PP. 1331-1336

Keywords: 等体积浸渍,碱金属,选择性,寿命,再生,催化

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Abstract:

通过等体积浸渍法,制备得到碱金属(Li、Na、K、Rb、Cs)改性的SAPO-34催化剂。并在常压连续固定床反应器上评价了各催化剂的甲醇制低碳烯烃(MTO)的性能,同时对催化剂进行了XRD、FT-IR、NH3-TPD等表征分析。结果表明,碱金属负载量为2%时,除Cs离子改性的催化剂低碳烯烃的选择性和寿命有所降低外,其他碱金属离子改性的SAPO-34催化剂低碳烯烃的选择性和寿命都有了明显的提高,尤其是Li离子改性的催化剂乙烯+丙烯的选择性达77%左右,寿命相对延长了2.5倍;将该催化剂再生3次后乙烯、丙烯的选择性几乎保持不变。

References

[1]  Xu Ruren (徐如人), Tang Wenqin (唐文琴), Tu Kungang (屠昆刚). Structure and Synthesis of Zeolite Molecular Sieves (沸石分子筛的结构与合成) [M].Changchun: Jilin University Press, 1987: 345
[2]  Li Junfen (李俊汾), Fan Weibin (樊卫斌), Dong Mei (董梅). Synthesis of SAPO-34 catalysts and their properties in methanol transforming olefins reaction [J].Chemical Journal of Chinese Universities (高等学校化学学报), 2011, 32 (3): 765-771
[3]  Barger P T, Heights A. Methanol conversion processing using SAPO catalysts [P]: US, 5095163.1991-2-28
[4]  Guan Xinxin, Liu Kecheng, Wu Guangjun. SAPO-34 nitride and application in the methanol to olefins (MTO) [J]. Journal of Molecular Catalysis, 2006, 20 (3): 270-273
[5]  Mees F D P, van der Voort P, Cool P. Controlled reduction of the acid site density of SAPO-34 molecular sieve by means of silanation and disilanation [J]. Journal of Physical Chemistry B, 2003, 107 (14): 3161-3167
[6]  Guan X X, Zhang F X, Wu G J, Guan N J. Synthesis and characterization of a basic molecular sieve: nitrogen-incorporated SAPO-34 [J]. Mater.Lett., 2006, 60 (25/26): 3141-3144
[7]  Bai Erzheng (白尔铮). Advances in methanol-to-olefin (MTO) technologies and SAPO-34 catalyst [J].Industrial Catalysis(工业催化), 2001, 9 (4): 3-8
[8]  Yoo K S, Kim J H, Park M J, Kim S J, Joo O S, Jung K D. Influence of solid acid catalyst on DME production directly from synthesis gas over the admixed catalyst of Cu/Zn/Al2O3 and various SAPO catalysts [J].Appl.Catal.A, 2007, 330: 57-62
[9]  Li Hongbin (李红彬), Lü Jinzhao (吕金钊), Wang Yijing (王一婧). Alkaline earth metals-modified SAPO-34 for methanol conversion to light olefins [J]. Chinese Journal of Catalysis (催化学报), 2009, 30 (6): 509-513
[10]  Dubois D R, Obrzut D L, Liu J, Thundimadathil J, Adekkanattu P M, Guin J A, Punnoose A, Seehra M S. Conversion of methanol to olefins over cobalt, manganese and nickel-incorporated SAPO-34 molecular sieves [J]. Fuel Processing Technology, 2003, 83: 203-218
[11]  Obrzut D L, Adekkanatt P M, Thundimadathil J. Reducing methane formation in methanol to olefins reaction on metal impregnated SAPO-34 molecular sieve [J]. Reaction Kinetics and Catalysis Letter, 2003, 80 (1): 113-121
[12]  Lin Kechun (林可纯), Huang Jie (黄捷), Xing Haijun (邢海军), Ning Chunli (宁春利). Metal modified SAPO-34 used for methanol conversion to light olefins//The 14th National Youth Catalytic Academic Conference Proceedings of the Meeting [C]. 2013: 248-249
[13]  Qi Guozhen (齐国祯), Xie Zaiku (谢在库), Zhong Siqing (钟思青). Thermodynamics research of catalysts for methanol to olefin reaction [J]. Chemical Engineering of Oil & Gas (石油与天然气化工), 2005, 34 (5): 349-353
[14]  Gayubo A G, Andres T A, Martin Olazar. Kinetics of the irreversible deactivation of the HZSM-5 catalyst in the MTO process [J].Chemical Engineering Science, 2003, 58: 5239-5249
[15]  Sehulz H, Ming W. Deactivation and thermal regeneration of zeolite HZSM-5 for methanol conversion at low temperature [J].Microporous and Mesoporous Materials, 1999, 29: 205-218
[16]  Haw J F, Song Weiguo, Mareus D M. The mechanism of methanol to hydrocarbon catalysis [J]. Acc.Chem.Res., 2003, 36: 317-326
[17]  Liu Hongxing (刘红星), Xie Zaiku (谢在库), Zhang Chengfang (张成芳). Characterization and thermal decomposition modes of SAPO-34 molecular sieves synthesized with different templates [J]. Chinese Journal of Chemical Physics (化学物理学报), 2003, 16 (6): 521-527
[18]  Lee Y J, Baek S C, Jun K L. Methanol conversion on SAPO-34 catalysts prepared by mixed template method [J]. Applied Catalysis A:General, 2009, 329: 130-136
[19]  Borade R B, Clearfield A. Synthesis of aluminum rich MCM-41 [J]. J.Mol.Catal., 1994, 88: 249-256
[20]  Liu Hongxing (刘红星), Xie Zaiku (谢在库), Zhang Yuxian (张玉贤). Surface acidity and catalytic performance of SAPO - 34 molecular sieve with CaO [J].Petrochemical Technology (石油化工), 2005, 34: 343-344
[21]  Wei Y X, Zhang D Z, Chang F X. Direct observation of induction period of MTO process with consecutive pulse reaction system [J]. Catal.Commun., 2007, 8 (12): 2248-2251
[22]  Li Jinzhe (李金哲), Qi Yue (齐越), Liu Zhongmin (刘中民). Influences of reaction conditions on ethene conversion to propene over SAPO-34 [J].Chinese Journal of Catalysis (催化学报), 2008, 29 (7): 660-664

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