Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (5): 795-803.

Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts

Akbar Zamaniyan^a,b, Yadollah Mortazavi^b, Abbas Ali Khodadadi^b, Ali Nakhaei Pour^a

a. Department of Natural Gas Conversion, Gas Research Division, Research Institute of Petroleum Industry (RIPI), Tehran 14665-137, Iran;
b. School of Chemical Engineering, University College of Engineering, University of Tehran, Tehran 11155-4563, Iran

收稿日期:2012-09-02 修回日期:2012-10-08 出版日期:2013-09-20 发布日期:2013-09-30
通讯作者: Akbar Zamaniyan

Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts

Akbar Zamaniyan^a,b, Yadollah Mortazavi^b, Abbas Ali Khodadadi^b, Ali Nakhaei Pour^a

a. Department of Natural Gas Conversion, Gas Research Division, Research Institute of Petroleum Industry (RIPI), Tehran 14665-137, Iran;
b. School of Chemical Engineering, University College of Engineering, University of Tehran, Tehran 11155-4563, Iran

Received:2012-09-02 Revised:2012-10-08 Online:2013-09-20 Published:2013-09-30

摘要/Abstract

摘要： Existence of intraparticle mass transfer limitations under typical Fischer-Tropsch synthesis has been reported previously, but there is no suitable study on the existence of intraparticle diffusion limitations under pretreatment steps (reduction and activation) and their effect on catalytic performance for iron based catalysts. In this study, Fe-Cu-La-SiO₂ catalysts were prepared by co-precipitation method. To investigate the intraparticle mass transfer limitation under reduction, activation and reaction steps, and its effect on catalytic performance, catalyst pellets with different sizes of 6, 3, 1 and 0.5 mm have been prepared. All catalysts were calcined, pretreated and tested under similar conditions. The catalysts were activated in hydrogen (5% H₂ in N₂) at 450℃ for 3 h and exposed to syngas (H₂/CO=1) at 270℃ and atmospheric pressure for 40 h. Afterwards, FTS reaction tests were performed for approximately 120 h to reach steady state conditions at 290℃, 17 bar and a feed flow (syngas H₂/CO=1) rate of 3 L/h (STP). Using small pellets resulted in higher CO conversion, FT reaction rate and C₅₊ productivity as compared with larger pellets. The small pellets reached steady state conditions just 20 h after starting the reaction. Whereas for larger pellets, CO conversion, FT reaction rate and C₅₊ productivity increased gradually, and reached steady state and maximum values after 120 h of operation. The results illustrate that mass transfer limitations exist not only for FTS reaction but also for the reduction and carburization steps which lead to various phase formation through catalyst activation. Also the results indicate that some effects of mass transfer limitations in activation step, can be compensated in the reaction step. The results can be used for better design of iron based catalyst to improve the process economy.

关键词: Fischer-Tropsch, mass transfer limitation, activation, catalyst, GTL

Abstract: Existence of intraparticle mass transfer limitations under typical Fischer-Tropsch synthesis has been reported previously, but there is no suitable study on the existence of intraparticle diffusion limitations under pretreatment steps (reduction and activation) and their effect on catalytic performance for iron based catalysts. In this study, Fe-Cu-La-SiO₂ catalysts were prepared by co-precipitation method. To investigate the intraparticle mass transfer limitation under reduction, activation and reaction steps, and its effect on catalytic performance, catalyst pellets with different sizes of 6, 3, 1 and 0.5 mm have been prepared. All catalysts were calcined, pretreated and tested under similar conditions. The catalysts were activated in hydrogen (5% H₂ in N₂) at 450℃ for 3 h and exposed to syngas (H₂/CO=1) at 270℃ and atmospheric pressure for 40 h. Afterwards, FTS reaction tests were performed for approximately 120 h to reach steady state conditions at 290℃, 17 bar and a feed flow (syngas H₂/CO=1) rate of 3 L/h (STP). Using small pellets resulted in higher CO conversion, FT reaction rate and C₅₊ productivity as compared with larger pellets. The small pellets reached steady state conditions just 20 h after starting the reaction. Whereas for larger pellets, CO conversion, FT reaction rate and C₅₊ productivity increased gradually, and reached steady state and maximum values after 120 h of operation. The results illustrate that mass transfer limitations exist not only for FTS reaction but also for the reduction and carburization steps which lead to various phase formation through catalyst activation. Also the results indicate that some effects of mass transfer limitations in activation step, can be compensated in the reaction step. The results can be used for better design of iron based catalyst to improve the process economy.

Key words: Fischer-Tropsch, mass transfer limitation, activation, catalyst, GTL

Akbar Zamaniyan, Yadollah Mortazavi, Abbas Ali Khodadadi, Ali Nakhaei Pour. Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts[J]. 能源化学(英文), 2013, 22(5): 795-803.

参考文献

[1] Guettel R, Turek T. Chem Eng Sci, 2009, 64(5): 955

[2] Fox III J M. Catal Rev-Sci Eng, 1993, 35(2): 169

[3] Pour A N, Housaindokht M R, Tayyari S F, Zarkesh J. J Nat Gas Chem, 2010, 19(2): 107

[4] Dry M E. Appl Catal A, 1996, 138(2): 319

[5] Van der Laan G P, Beenackers A A C M. Catal Rev-Sci Eng, 1999, 41(3-4): 255

[6] Shen W J, Zhou J L, Zhang B J. J Nat Gas Chem, 1996, 5(1): 59

[7] Shen W J, Zhou J L, Zhang B J. J Nat Gas Chem, 1996, 5(2): 107

[8] Zimmerman W H, Rossin J A, Bukur D B. Ind Eng Chem Res, 1989, 28(4): 406

[9] Post M F M, Van't Hoog A C, Minderhoud J K, Sie S T. AIChE J, 1989, 35(7): 1107

[10] Robert Becker E, Pereira C J. Computer-Aided Design of Catalysts. New York: Marcel Dekker, 1993. 199

[11] Pour A N, Zare M, Zamani Y. J Nat Gas Chem, 2010, 19(1): 31

[12] Zamaniyan A, Mortazavi Y, Khodadadi A A, Manafi H. Appl Catal A, 2010, 385(1-2): 214

[13] Hao Q L, Bai L, Xiang H W, Li Y W. J Nat Gas Chem, 2009, 18(4): 429

[14] Feyzi M, Mirzaei A A, Bozorgzadeh H R. J Nat Gas Chem, 2010, 19(3): 341

[15] Pour A N, Shahri S M K, Zamani Y, Zamanian A. J Nat Gas Chem, 2010, 19(2): 193

[16] Davis B H, Occelli M L. Fischer-Tropsch Synthesis, Catalysts and Catalysis. Amsterdam: Elsevier Science Ltd, 2007. 381

[17] Lox E S, Marin G B, De Grave E, Bussiére P. Appl Catal A, 1988, 40(1-2): 197

[18] Shroff M D, Kalakkad D S, Coulter K E, Kohler S D, Harrington M S, Jackson N B, Sault A G, Datye A K. J Catal, 1995, 156(2): 185

[19] Xu J, Bartholomew C H. J Phys Chem B, 2005, 109(6): 2392

[20] Davis B H. Catal Today, 2009, 141(1-2): 25

[21] Bukur D B, Koranne M, Lang X S, Rao K R P M, Huffman G P. Appl Catal A, 1995, 126(1): 85

[22] Bukur D B, Nowicki L, Manne R K, Lang X S. J Catal, 1995, 155(2): 366

[23] Liu W, Hu J L, Wang Y. Catal Today, 2009, 140(3-4): 142

[24] Donnelly T J, Satterfield C N. Appl Catal, 1989, 52(1-2): 93

[25] Zhan X D, Davis B H. Appl Catal A, 2002, 236(1-2): 149

Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts

Effect of mass transfer limitations on catalyst performance during reduction and carburization of iron based Fischer-Tropsch synthesis catalysts

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	Sasan Ghashghaie, Samson Ho-Sum Cheng, Jie Fang, Hafiz Khurram Shahzad, Robin Lok-Wang Ma, chi-Yuen Chung. Electrophoretically deposited binder-free 3-D carbon/sulfur nanocomposite cathode for high-performance Li-S batteries[J]. 能源化学(英文版), 2020, 48(9): 92-101.
[2]	Bo Xu, Xiaodong Yang, Qiang Fang, Linbing Du, Yan Fu, Yiqiang Sun, Qisheng Liu, Qingquan Lin, cuncheng Li. Anion-cation dual doping: An effective electronic modulation strategy of Ni₂P for high-performance oxygen evolution[J]. 能源化学(英文版), 2020, 48(9): 116-121.
[3]	C.Cannilla, G.Bonura, S.Maisano, L.Frusteri, M.Migliori, G.Giordano, S.Todaro, f.Frusteri. Zeolite-assisted etherification of glycerol with butanol for biodiesel oxygenated additives production[J]. 能源化学(英文版), 2020, 48(9): 136-144.
[4]	Wei Wei, Zhangjing Chen, Yan Zhang, Jian Chen, Liu Wan, cheng Du, Mingjiang Xie, Xuefeng Guo. Full-faradaic-active nitrogen species doping enables high-energy-density carbon-based supercapacitor[J]. 能源化学(英文版), 2020, 48(9): 277-284.
[5]	Jing-Qi Chi, Min Yang, Yong-Ming Chai, Zhi Yang, Lei Wang, bin Dong. Design and modulation principles of molybdenum carbide-based materials for green hydrogen evolution[J]. 能源化学(英文版), 2020, 48(9): 398-423.
[6]	A.Emamdoust, V.La Parola, G.Pantaleo, M.L.Testa, S.Farjami Shayesteh, A.M.Venezia. Partial oxidation of methane over SiO₂ supported Ni and NiCe catalysts[J]. 能源化学(英文版), 2020, 47(8): 1-9.
[7]	Rong Jiang, Xin Chen, Jinxia Deng, Tianyu Wang, Kang Wang, Yanli Chen, Jianzhuang Jiang. In-situ growth of ZnS/FeS heterojunctions on biomass-derived porous carbon for efficient oxygen reduction reaction[J]. 能源化学(英文版), 2020, 47(8): 79-85.
[8]	Jae Hyeon Nam, Myeong Je Jang, Hye Yeon Jang, Woojin Park, Xiaolei Wang, Sung Mook Choi,byungjin Cho. Room-temperature sputtered electrocatalyst WSe₂ nanomaterials for hydrogen evolution reaction[J]. 能源化学(英文版), 2020, 47(8): 107-111.
[9]	Teng Lv, Wei Weng, Jing Zhou,dong Gu, Wei Xiao. Effects of K and Mn promoters over Fe₂O₃ on Fischer-Tropsch synthesis[J]. 能源化学(英文版), 2020, 47(8): 118-127.
[10]	Yuxin Li, Xiang Zhu, Yawen Chen, Shiqiao Zhang, Jia Li, Jianguo Liu. Rapid synthesis of highly active Pt/C catalysts with various metal loadings from single batch platinum colloid[J]. 能源化学(英文版), 2020, 47(8): 138-145.
[11]	Xingyu Li,caiying Wen, Huifeng Li, Genban Sun. In situ decoration of nanosized metal oxide on highly conductive MXene nanosheets as efficient catalyst for Li-O₂ battery[J]. 能源化学(英文版), 2020, 47(8): 272-280.
[12]	Shijie Zhang, Peng Zhang, Ruohan Hou,bin Li, Yongshang Zhang, Kangli Liu, Xilai Zhang, Guosheng Shao. In situ sulfur-doped graphene nanofiber network as efficient metal-free electrocatalyst for polysulfides redox reactions in lithium-sulfur batteries[J]. 能源化学(英文版), 2020, 47(8): 281-290.
[13]	Wei Liu, Hongxiu Zhang,chuanming Li, Xin Wang, Jingquan Liu, Xingwang Zhang. Non-noble metal single-atom catalysts prepared by wet chemical method and their applications in electrochemical water splitting[J]. 能源化学(英文版), 2020, 47(8): 333-345.
[14]	Hansaem Jang, Jaeyoung Lee. Iridium oxide fabrication and application:A review[J]. 能源化学(英文版), 2020, 46(7): 152-172.
[15]	Shaoqing Zhu, Chen Hu, Ye Xu, Yi Jin, Jianglan Shui. Performance improvement of lithium-ion battery by pulse current[J]. 能源化学(英文版), 2020, 46(7): 208-214.