PREPARASI, MODIFIKASI DAN KARAKTERISASI KATALIS NI-MO/ZEOLIT ALAM DAN MO-NI/ZEOLIT ALAM
ABSTRACT: Preparations and
modifications of Ni-Mo/natural zeolite and Mo-Ni/natural zeolite catalysts as
well as their characterizations had been
carried out. The preparations of catalysts were carried out by reacting a
natural zeolite produced in Wonosari with the precursor of Ni(NO3 )2 .9H2 O and
Mo(NH4 )7 .6H2 O. The modifications were performed by varying the rasio of
Ni/Mo whereas the Mo was previously loaded to the zeolite or Mo/Ni ratio
whereas the Ni was previously loaded and the total metal content was 1 wt.%
based on the zeolite. The aim of this research for the fututure is to prepare
catalysts with high acidity and crystallinity for the conversion of waste plastics fraction to
gasoline fraction (C5 -C12
hydrocarbons).
The characterization of catalysts included determination of metal content
using Atomic Adsorption Analysis (AAS), acidity by adsorption of ammonia or
pyridine vapour base method, 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 Ni and Mo to the
zeolite produced higher acidity catalysts than those of monometal loaded
catalysts. The increase of Ni loaded caused the decrease of catalysts acidity,
on the other hand, the increase of Mo loaded caused the increase of catalysts
acidity. 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. The metals loading on the zeolite did not
defect its crystallnity. Metal contents of the zeolite before the EDTA
treatment were higher than those after the treatment. The relationship between
the metal ratios towards the catalyst acidity was varying. The EDTA treatment
to the zeolite sample enhanced the crystallinity of the sampel. Catalyst
samples produced in this research have high acidities and crystallinities, thus
promisingly can be used for conversion process of waste plastics to gasoline
fraction.
Keywords: natural zeolite,
acidity, Ni-Mo/natural zeolite, Mo-Ni/natural zeolite, crystallinity, EDTA
Penulis: Wega Trisunaryanti,
Endang Triwahyuni dan Sri Sudiono
Kode Jurnal: jptindustridd050007
