Characterization of Ru on Activated Carbon Catalysts Prepared by Supercritical Carbon Dioxide Impregnation

Abstract:

In this work, a novel method was reported for preparation of Ru/activated carbon (Ru/AC) catalysts. Supercritical carbon dioxide (SC CO₂) was employed as medium for the impregnation of ACs with inorganometallic precursor of RuCl3. The Ru/AC catalysts displayed excellent activity for the catalytic hydrogenation of D-glucose. Selected Ru/AC catalysts were characterized by N₂ adsorption-desorption, TPR and TEM analysis. The results show that the order of effects on catalytic activity are supercritical temperature > supercritical pressure > amount of co-solvent > time of impregnation. The optimal supercritical parameters for preparing Ru/AC catalyst were 313 K, 8 MPa, 4 ml of methanol and 9 h, respectively. The highest reaction rate of hydrogenation reached 86.35 mmol•min-1g-1Ru, upgrading 42.96% compared with the activity of conventional Ru/AC prepared using aqueous impregnation. The SC CO2 impregnation could result in Ru uniformly dispersed on the outer surface and in the pore of AC, leading _{Subscript text}to higher dispersion of Ru and enhanced interaction between AC and Ru. Furthermore, the enhanced interaction induces improved reduce temperature. Consequently, the catalytic activity of Ru/AC catalysts is improved significantly.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 734-738
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.734
• Online since: November 2011
• Authors: San Kui Xu, Li Min Li, Rui Li, Nan Nan Guo, Peng Zhang
• Keywords: Activated Carbon (AC), Glucose Hydrogenation, Ruthenium Catalyst, Supercritical Fuid

References

[1] J. A. Schwarz, C. Contescu and A.Contescu: Chem. Rev.Vol.95 (1995), p.477

[2] R. J. Farrauto, C. H. Bartholomew: Fundamentals of Industrial Catalytic Processes, 2nd Ed.; John Wiley & Sons: Hoboken, New Jersey,(2003), p.9

[3] Y. Zhang, D. F. Kang, M. Aindow, C. Erkey: Phys. Chem. B Vol.109 (2005), p.2617

[4] C. Erkey: J Supercrit. Fluids Vol.47 (2009),p.517

[5] ) Y. Zhang, C. Erkey: Ind. Eng. Chem. Res. Vol.44 (2005), p.5312.

[6] C. D. Saquing, D. Kang, M Aindow and C. Erkey: Microporous Mater. Vol.80 (2005), p.11

[7] Y. H. Lin, X. L. Cui, C. Yen and C. M. Wai: J. Phys. Chem. B Vol.109 (2005), p.14410.

[8] X. R. Ye, Y. H. Lin, C. M. Wang, M. H. Engelhard and C. M. Wai: J. Mater. Chem.Vol.14 (2004), p.908

[9] C. D. Saquing, T. T. Cheng, M. Aindow, and C. Erkey: J. Phys. Chem.B Vol.108 (2004), p.7716

[10] K. Jaehoon, M. Jason Kelly, H. Henry Lamb, W.R. George George and J.K. Douglas: J. Phys. Chem. C Vol.112 (2008),p.10446

[11] B.Wong , S. Yoda and S. M. Howdle: J. Supercrit. Fluids Vol.42 (2007),p.282

[12] A. D.Taylor, R. C. Sekol, J.M. Kizuka, S.D. Cunha and C. M. Comisar: J. Catal. Vol.259 (2008),p.5

[13] Jianxia Jiao, Qun Xu , Limin Li: J Colloid Interface. Vol.316 (2007), p.596

[14] J. Cervello, J. F. Garcia de la Banda,E. Hermana and J. F. Jimenez: Chem. Ing. Tech.Vol.48 (1976), p.20

[15] B. Wong, S. Yoda and S.M. Howdle: J. Supercrit. Fluids Vol. 42 (2007),p.282

[16] Q. Peng , J.C. Spagnola and G.N. Parsons: J. Electrochem.. Soc.Vol.155 (2008), p.580

[17] B. W. Hoffer, E. Crezee, P. R. M. Mooijman, A .D. Langeveld , F. Kapteijn and J. A. Moulijn: Catal.Today Vol.79-80 (2003), p.35

DOI: 10.1016/s0920-5861(03)00040-3

[18] K.V. Gorp, E.Boerman, C.V. Cavenaghi and P.H. Berben: Catal.Today Vol.52 (1999),p.349

[19] G. Pierre, N. Nathalie, G. Flèche, P. Fuertes and A. Perrard: J Catal 180 (1998),p.51

[20] B.Kusserow, S.Schimpf and P.Claus: Adv. Synth. Catal.Vol.345 (2003),p.289

[21] A.D. Lucas, J.L. Valverde, P.CanizaresandL.Rodriguez:Appl.Catal.AVol.172 (1998),p.165