Open AccessCharacterization of sarulla natural zeolite activated with various acid concentration and loaded with Ni and Ni-Mo metals as bifunctional catalysts
Author(s) -
Junifa Layla Sihombing,
Eva Marlina Ginting,
S Amdayani,
Ahmad Nasir Pulungan,
V Tanjung,
A A Sandy,
Restu Mundhi Rahayu
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2193/1/012081
Subject(s) - zeolite , catalysis , bifunctional , crystallinity , calcination , materials science , inorganic chemistry , bet theory , metal , specific surface area , chemical engineering , chemistry , metallurgy , organic chemistry , composite material , engineering
Metal loading on zeolite to produce bifunctional catalysts is reported to increased the characteristics of zeolites which synergistically increase their catalytic activity. Sarulla natural zeolite (SNZ) from North Sumatera has the potential as a catalyst because of its excellent chemical properties including acidity, thermal stability, and large pores. On the other hand, natural zeolite contains a lot of impurities and lower acidity density so that it needs to be processed before use. In this research, modification of the acidity density of zeolite and metal loading were expected to improve the characteristics of SNZ as a catalyst. To achieved this goal, the research methods carried out include preparation, activation process with mineral acid with various concentrations of 3M, 5M, and 7M, then calcination with N 2 gas flow. Ni and NiMo loading by wet impregnation method followed by oxidation and reduction with O 2 and H 2 gas flow, respectively. Some important properties of the catalyst were characterized by XRD, SEM, and determination of surface area by BET method. Ni/SNZ-7 catalyst showed the largest spesific surface area (92 m 2 /g), the least impurities (3%), and the most homogeneous surface morphology compared to other catalysts. The deposition of two metals in the zeolite generally causes an increase in the pore diameter and crystallinity degree, while decreasing in the pore volume of catalyst.