Effect of Operating Conditions on the Coke Formation and Nickel Catalyst Performance During Cracking of Tar
Tóm tắt
Catalytic cracking of toluene as a tar model compound was carried out to investigate the effect of operating conditions on the coke formation and performance of nickel catalyst. The deactivation of catalyst depended on the quantity and nature of deposited coke, which were affected by the operating conditions, including temperature, nickel and steam concentration. The highest yield ratio of filamentous coke to the amorphous coke was 1.11 with the Ni/Al2O3 catalyst containing the highest amount of Ni examined, 20%, and heated at 700 °C without steam injection. The formation of filamentous coke maintained the catalyst activity at the first 20 min, which had less serious effect on the deactivation than the amorphous coke. Two types of coke deactivation trends were observed. Type I was associated with the deactivation by amorphous coke and type II was due to the corporate effects of amorphous and filamentous coke, which extended the life time of the catalyst.
Tài liệu tham khảo
Matsuzaki, Y., Yasuda, I.: Electrochemical oxidation of H2 and CO in a H2–H2O–CO–CO2 system at the interface of a Ni-YSZ cermet electrode and YSZ electrolyte. J. Electrochem. Soc. 147(5), 1630–1635 (2000)
Raje, A.P., Davis, B.H.: Fischer-Tropsch synthesis over iron-based catalysts in a slurry reactor. Reaction rates, selectivities and implications for improving hydrocarbon productivity. Catal. Today. 36(3), 335–345 (1997)
Wang, R., Huang, Q., Lu, P., Li, W., Wang, S., Chi, Y., Yan, J.: Experimental study on air/steam gasification of leather scraps using U-type catalytic gasification for producing hydrogen-enriched syngas. Int. J. Hydrogen Energy. 40(26), 8322–8329 (2015)
Arregi, A., Amutio, M., Lopez, G., et al.: Hydrogen-rich gas production by continuous pyrolysis and in-line catalytic reforming of pine wood waste and HDPE mixtures. Energy Convers. Manage. 136, 192–201 (2017)
Gao, N., Liu, S., Han, Y., Xing, C., Li, A.: Steam reforming of biomass tar for hydrogen production over NiO/ceramic foam catalyst. Int. J. Hydrogen Energy. 40(25), 7983–7990 (2015)
Lu, P., Huang, Q., Bourtsalas, A.C., Chi, Y., Yan, J.: Experimental research of basic properties and reactivity of waste derived chars. Appl. Therm. Eng. 119, 639–649 (2017)
Li, C., Suzuki, K.: Tar property, analysis, reforming mechanism and model for biomass gasification—an overview. Renew. Sustain. Energy Rev. 13(3), 594–604 (2009)
Abu El-Rub, Z., Bramer, E.A., Brem, G.: Review of catalysts for tar elimination in biomass gasification processes. Ind. Eng. Chem. Res. 43, 6911–6919 (2004)
Auprêtre, F., Descorme, C., Duprez, D.: Bio-ethanol catalytic steam reforming over supported metal catalysts. Catal. Commun. 3(6), 263–267 (2002)
Pfeifer, C., Hofbauer, H.: Development of catalytic tar decomposition downstream from a dual fluidized bed biomass steam gasifier. Powder Technol. 180(1–2), 9–16 (2008)
Furusawa, T., Miura, Y., Kori, Y., Sato, M., Suzuki, N.: The cycle usage test of Ni/MgO catalyst for the steam reforming of naphthalene/benzene as model tar compounds of biomass gasification. Catal. Commun. 10(5), 552–556 (2009)
Sato, K., Fujimoto, K.: Development of new nickel based catalyst for tar reforming with superior resistance to sulfur poisoning and coking in biomass gasification. Catal. Commun. 8(11), 1697–1701 (2007)
Ago, H., Uehara, N., Yoshihara, N., Tsuji, M., Yumura, M., Tomonaga, N., Setoguchi, T.: Gas analysis of the CVD process for high yield growth of carbon nanotubes over metal-supported catalysts. Carbon. 44(14), 2912–2918 (2006)
Acomb, J.C., Wu, C., Williams, P.T.: Control of steam input to the pyrolysis-gasification of waste plastics for improved production of hydrogen or carbon nanotubes. Appl. Catal. B. 147, 571–584 (2014)
Gong, J., Liu, J., Wan, D., Chen, X., Wen, X., Mijowska, E., Jiang, Z., Wang, Y., Tang, T.: Catalytic carbonization of polypropylene by the combined catalysis of activated carbon with Ni2O3 into carbon nanotubes and its mechanism. Appl. Catal. A. 449, 112–120 (2012)
Barbarias, I., Lopez, G., Amutio, M., Artetxe, M., Alvarez, J., Arregi, A., Bilbao, J., Olazar, M.: Steam reforming of plastic pyrolysis model hydrocarbons and catalyst deactivation. Appl. Catal. A. 527, 152–160 (2016)
Sehested, J.: Four challenges for nickel steam-reforming catalysts. Catal. Today. 111, 103–110 (2006)
Vicente, J., Montero, C., Ereña, J., Azkoiti, M. J., Bilbao, J., Gayubo, A. G.: Coke deactivation of Ni and Co catalysts in ethanol steam reforming at mild temperatures in a fluidized bed reactor. Int. J. Hydrogen Energy. 39(24), 12586–12596 (2014)
Montero, C., Ochoa, A., Castaño, P., Bilbao, J., Gayubo, A.G.: Monitoring Ni0 and coke evolution during the deactivation of a Ni/La2O3–αAl2O3 catalyst in ethanol steam reforming in a fluidized bed. J. Catal. 331, 181–192 (2015)
Lu, P., Qian, X., Huang, Q., Chi, Y., Yan, J.: Catalytic cracking of toluene as a tar model compound using sewage–sludge-derived char. Energy Fuels. 30(10), 8327–8334 (2016)
Huang, Q., Lu, P., Hu, B., Chi, Y., Yan, J.: Cracking of model tar species from the gasification of municipal solid waste using commercial and waste-derived catalysts. Energy Fuels. 30(7), 5740–5748 (2016)
Sadezky, A., Muckenhuber, H., Grothe, H., Niessner, R., Pöschl, U.: Raman microspectroscopy of soot and related carbonaceous materials: spectral analysis and structural information. Carbon. 43(8), 1731–1742 (2005)
Liu, X., Zheng, Y., Liu, Z., Ding, H., Huang, X., Zheng, C.: Study on the evolution of the char structure during hydrogasification process using Raman spectroscopy. Fuel. 157, 97–106 (2015)
Chen, D., Christensen, K.O., Ochoa-Fernández, E., et al.: Synthesis of carbon nanofibers: effects of Ni crystal size during methane decomposition. J. Catal. 229, 82–96 (2005)
Rossetti, I., Lasso, J., Nichele, V., et al.: Silica and zirconia supported catalysts for the low-temperature ethanol steam reforming. Appl. Catal. B. 150, 257–267 (2014)
Froment, G.F., Bischoff, K.B., De, W.J.: Chemical reactor analysis and design. Wiley, New York (1990)
Helveg, S., Sehested, J., Rostrup-Nielsen, J.R.: Whisker carbon in perspective. Catal. Today. 178, 42–46 (2011)
Oehlschlaeger, M.A., Davidson, D.F., Hanson, R.K.: Thermal decomposition of toluene: overall rate and branching ratio. Proc. Combust. Inst. 31(1), 211–219 (2007)
Liu, S., Mei, D., Wang, L., Tu, X.: Steam reforming of toluene as biomass tar model compound in a gliding arc discharge reactor. Chem. Eng. J. 307, 793–802 (2017)