Sinterización de catalizadores monometálicos y bimetálicos a partir de 𝐍𝐢(𝐍𝐎𝟑)𝟐 y 𝐙𝐧(𝐍𝐎𝟑)𝟐 con zeolita zsm-5

Abstract

In this research, supported catalysts were synthesized, with the incorporation of metals, from salts of Ni(NO3)2 and Zn(NO3)2 .The monometallic catalyst was synthesized by impregnation of Ni and the bimetallic catalyst by co-impregnation of Ni-Zn. The catalytic support used is zeolitic type ZSM-5 with a composition of aluminosilicates and orthorhombic structure. For synthesis the support is first protonated, then in a rotary vapor, the zeolite ZSM-5 is added with NH4NO3 until the mixture is homogenized. To the product is added Ni(NO3)2 to impregnate it Ni, a process that is carried out in the rotary vapor, for the catalyst Ni/ZSM-5. For the Ni-Zn/ZSM-5 catalyst, the process is identical until the addition of NH4NO3, then the co-impregnation is executed in a rotary vapor with the addition at the same time of a solution of Ni(NO3)2 and Zn(NO3)2 .The products are filtered, allowed to dry, and calcined. The material obtained is characterized by techniques, FT-IR, BET, SEM, and TPD-NH3, used to analyze the physicochemical properties of catalysts and determine which presents greater efficiency. Additional characterizations such as TPD-H2, TPR-H2, metal scattering, chemisorption pulses H2, and TGA were added to the analysis. With the analysis of the characterizations, it is concluded that a monometallic catalyst with Ni particles and a bimetallic catalyst with Ni-Zn was gotten. The synthesized catalysts have an effect on the analysis BET and acidity, however, the catalyst Ni-Zn/ZSM-5, presents a higher value of acidity compared to the monometallic, indicated to the bimetallic catalyst, as the one that presents better physicochemical properties and greater efficiency.