Iron catalyst encapsulated in carbon nanotubes for CO hydrogenation to light olefins

doi:10.1016/S1872-2067(15)60882-8

Abstract

Abstract:

Fe-based catalyst is an outstanding candidate for the Fischer-Tropsch reaction to get light olefins from syngas directly. However, exposed Fe species are susceptible to sintering and coking, which lead to deactivation. Here, we demonstrate that Fe nanoparticles encapsulated in pod-like carbon nanotubes (Pod-Fe) can be used as an efficient Fischer-Tropsch catalyst to produce light olefins. It gave a higher selectivity of light olefins (45%) and high stability over 120 h reaction (P=0.5 MPa, T=320℃, CO:H₂= 1:2, gas hourly space velocity=3500 h^-1). A catalyst with exposed Fe particles on the outside of the Pod-Fe (FeO_x/Pod-Fe) catalyst showed a selectivity of light olefins of 42%, but had a significantly lower stability due to the agglomeration of Fe nanoparticles and carbon deposition. These results indicated that the graphene shell of Pod-Fe played an important role in protecting the Fe particles and provided a rational way to enhance the activity and stability of Fe-based catalysts in high temperature reactions.

Key words: Fischer-Tropsch synthesis, Stability, Light olefins, Carbon nanotubes, Iron nanoparticles

Xiaoqi Chen, Dehui Deng, Xiulian Pan, Xinhe Bao. Iron catalyst encapsulated in carbon nanotubes for CO hydrogenation to light olefins[J]. Chinese Journal of Catalysis, 2015, 36(9): 1631-1637.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)60882-8

https://www.cjcatal.com/EN/Y2015/V36/I9/1631

References

[1] Schulz H. Appl Catal A, 1999, 186: 3
[2] Tijmensen M J A, Faaij A P C, Hamelinck C N, van Hardeveld M R M. Biomass Bioenergy, 2002, 23: 129
[3] Torres Galvis H M, Bitter J H, Khare C B, Ruitenbeek M, Dugulan A I, de Jong K P. Science, 2012, 335: 835
[4] Torres Galvis H M, de Jong K P. ACS Catal, 2013, 3: 2130
[5] Khodakov A Y, Chu W, Fongarland P. Chem Rev, 2007, 107: 1692
[6] Davis B H. Ind Eng Chem Res, 2007, 46: 8938
[7] Van Der Laan G P, Beenackers A A C M. Catal Rev-Sci Eng, 1999, 41: 255
[8] Iglesia E, Soled S L, Fiato R A. J Catal, 1992, 137: 212
[9] Li S Z, Li A W, Krishnamoorthy S, Iglesia E. Catal Lett, 2001, 77: 197
[10] Zhang Q H, Kang J C, Wang Y. ChemCatChem, 2010, 2: 1030
[11] Yang Z Q, Guo S J, Pan X L, Wang J H, Bao X H. Energy Environ Sci, 2011, 4: 4500
[12] Janardanarao M. Ind Eng Chem Res, 1990, 29: 1735
[13] Chen W, Fan Z L, Pan X L, Bao X H. J Am Chem Soc, 2008, 130: 9414
[14] de Smit E, Weckhuysen B M. Chem Soc Rev, 2008, 37: 2758
[15] Koeken A C J, Torres Galvis H M, Davidian T, Ruitenbeek M, de Jong K P. Angew Chem Int Ed, 2012, 51: 7190
[16] Niemantsverdriet J W, Van der Kraan A M, Van Dijk W L, Van der Baan H S. J Phys Chem, 1980, 84: 3363
[17] Wan H J, Wu B S, Zhang C H, Xiang H W, Li Y W, Xu B F, Yi F. Catal Commun, 2007, 8: 1538
[18] Zhang C H, Yang Y, Teng B T, Li T Z, Zheng H Y, Xiang H W, Li Y W. J Catal, 2006, 237: 405
[19] Pour A N, Zamani Y, Tavasoli A, Kamali Shahri S M, Taheri S A. Fuel, 2008, 87: 2004
[20] Pour A N, Shahri S M K, Zamani Y, Irani M, Tehrani S. J Nat Gas Chem, 2008, 17: 242
[21] Perrichon V, Charcosset H, Barrault J, Forquy C. Appl Catal, 1983, 7: 21
[22] Raupp G B, Delgass W N. J Catal, 1979, 58: 337
[23] Zhang C H, Wan H J, Yang Y, Xiang H W, Li Y W. Catal Commun, 2006, 7: 733
[24] Deng D H, Yu L, Chen X Q, Wang G X, Jin L, Pan X L, Deng J, Sun G Q, Bao X H. Angew Chem Int Ed, 2013, 52: 371
[25] Deng J, Yu L, Deng D H, Chen X Q, Yang F, Bao X H. J Mater Chem A, 2013, 1: 14868
[26] Deng J, Ren P J, Deng D H, Yu L, Yang F, Bao X H. Energy Environ Sci, 2014, 7: 1919
[27] Deng J, Ren P J, Deng D H, Bao X H. Angew Chem Int Ed, 2015, 54: 2100
[28] Chen X Q, Xiao J P, Wang J, Deng D H, Hu Y F, Zhou J G, Yu L, Heine T, Pan X L, Bao X H. Chem Sci, 2015, 6: 3262
[29] Wang J, Wang G X, Miao S, Jiang X L, Li J Y, Bao X H. Carbon, 2014, 75: 381
[30] Hu Y, Jensen J O, Zhang W, Cleemann L N, Xing W, Bjerrum N J, Li Q F. Angew Chem, Int Ed, 2014, 53: 3675
[31] Zheng X J, Deng J, Wang N, Deng D H, Zhang W H, Bao X H, Li C. Angew Chem, Int Ed, 2014, 53: 7023
[32] Fu T, Wang M, Cai W M, Cui Y M, Gao F, Peng L M, Chen W, Ding W P. ACS Catal, 2014, 4: 2536
[33] Luo J, Yu H, Wang H J, Peng F. Catal Commun, 2014, 51: 77
[34] Keiski R L, Salmi T, Niemistö P, Ainassaari J, Pohjola V J. Appl Catal A, 1996, 137: 349
[35] Rhodes C, Peter Williams B, King F, Hutchings G J. Catal Commun, 2002, 3: 381
[36] Edwards M A, Whittle D M, Rhodes C, Ward A M, Rohan D, Shannon M D, Hutchings G J, Kiely C J. Phys Chem Chem Phys, 2002, 4: 3902
[37] Yang C, Zhao H B, Hou Y L, Ma D. J Am Chem Soc, 2012, 134: 15814
[38] de Smit E, Beale A M, Nikitenko S, Weckhuysen B M. J Catal, 2009, 262: 244