| Preparation, characterization and application of the hydrotalcite nanoparticles derived catalysts in dry reforming of methane Zoulikha Abdelsadek1; Patrick J. Masset2; 1LABORATORY OF CHEMISTRY AND NATURAL GAS, FACULTY OF CHEMISTRY, USTHB, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERING, UNIVERSITY OF M’HAMED BOUGARA, ALgiers, Algeria; 2TECHNALLIUM ENGINEERING & CONSULTING, Steinberg am See, Germany; PAPER: 197/Chemistry/Regular (Oral) SCHEDULED: 17:10/Thu. 24 Oct. 2019/Aphrodite A (100/Gr. F) ABSTRACT: Hydrotalcite-based nanomaterials have gained considerable interest by academic and industrial researchers due to their properties in several industrial domains such as in medicine, the pharmaceutical industry, catalysis, electrochemistry, and in polymerization reactions [1, 3]. Catalytic properties can especially be tuned due their double lamellar sheet structure charged positively where divalent M<sup>2+</sup> and trivalent M<sup>3+</sup>metals are located. In the present work, hydrotalcite-derived samples based on Ni and Co (NiMgAl, CoMgAl and NiCoMgAl) were prepared by low saturation coprecipitation at constant basic pH (pH = 11). The precursors were calcined at 450°C (4°C/min) for 6 hours. After that, the temperature was reduced to 700°C (4°C/min) during 1 hour. All obtained solids (none calcined, calcined and reduced) were characterized by several physico-chemical analysis methods (DRX, SAA, FTIR, SEM, MET, RTP, ATG/ATD and BET).The catalysts obtained were tested in dry reforming of methane (DRM), considered as promising for the production of syngas (H<sub>2</sub> + CO) in order to reduce the footprint of greenhouses gas (CH<sub>4</sub>, CO<sub>2</sub>), which is one of the keys of the climate transition. Catalytic testing of DRM for the series of the catalysts (NiMgAl-HTc-R, CoMgAl-HTc-R and NiCoMgAl-HTc-R) was carried out at 700°C (4°C/min) for 20 hours. The catalytic performances of examined solids showed the following sequence:<br />NiMgAl-HTc-R >NiCoMgAl-HTc-R >>>>CoMgAl-HTc-R.<br />NiMgAl-HTc-R was found to exhibit the best catalytic activity, selectivity with the highest resistance to the carbon poisoning and was ascribed to the good textural and structural features presented by NiMgAl-HTc-R such as high surface area, strong basic character and well dispersion of the active phase. References: [1] F. Cavani, F. Trifirb, A. Vaccari., Catal. Today, 11 (1991) 173. [2] A. Vaccari., Catal. Today, 41 (1998) 53. [3] C. Forano, T. Hibino, F. Leroux,Taviot-Guiho, Handbook of Clay Science, 1 (2006) 1021. [4] L.A. Rodrigues, A. Figueiras, F.Veiga, R. M. Freitas, Colloids and Surfaces Biointerfaces, 103 (2013) 642. |
