Preparasi, Karakterisasi dan Modifikasi Katalis Ni-Pd/Zeolit Alam
ABSTRACT: Preparation, and
modification of Ni-Pd/natural zeolite as well as their characterizations had
been carried out. The aim of this research for the fututure is to prepare the
best characters catalyst for the conversion of waste plastics fraction to
gasoline fraction (C5-C12 hydrocarbons). The preparation of catalysts was
performed by reacting a natural zeolite with the precursor of Ni(NO3)2. 9H2O
and PdCl2 in an ammonia solution (25%). The modifications were performed by
varying the rasio of Ni/Pd loaded to the zeolite, whereas the Pd was previously
loaded and total metal content was 1 wt.% based on the zeolite. The
characterization of catalysts included determination of acidity gravimetrically
by adsorption of ammonia or pyridine vapour
base method, metal content by Atomic Adsorption Spectrophotometer (AAS)
and X-ray Fluoresence (XRF) and crystallinity by X-ray Diffraction (XRD). The
treatment of catalysts using Etilene Diamine Tetra Acetic acid (EDTA) was performed to study the metal
distribution on the outer or inner surface of the zeolite. The characterization
results showed that the loading of metals to the zeolite increased its acidity
and decreased its spesific surface area, however, did not defect its
crystallnity. The metals loaded on the
zeolite were distributed inside the pore and at outer surface of the zeolite.
For all catalyst samples, the acidities determined using ammonia were higher
than those of pyridine, and the acidities determined before the EDTA treatment
was lower than those after the treatment.
Metal contents of the zeolite before the EDTA treatment were higher than
those after the treatment. The EDTA treatment enhanced the crystallinity of the
sampel. The relationship between the metal rasio towards the acidity of the
catalyst samples were in variation. Catalyst samples produced in this research
have good characters, thus promisingly can be used for conversion process of
waste plastics to gasoline fraction.
Penulis: Wega Trisunaryanti,
Endang Triwahyuni and Sri Sudiono
Kode Jurnal: jpkimiadd050022
