Premium
Synthesis and Characterization of Multi‐Modal γ‐Al 2 O 3 : A Systematic Investigation on the Optimization of Hydrodemetallization Catalyst Preparation
Author(s) -
Ghassabzaadeh Hamid,
Niaei Aligoli,
Rashidzadeh Mehdi
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001252
Subject(s) - catalysis , materials science , characterization (materials science) , adsorption , desorption , space velocity , modal , aluminium , chemical engineering , composite material , nanotechnology , chemistry , organic chemistry , selectivity , engineering
The pore structure of hydrodemetallization catalysts plays a vital role in their lifetime and thus, on the process economy. In this investigation, a multi‐modal meso and macroporous alumina has been prepared by using aluminum alkoxides. To tune the alumina properties to the desired values, a systematic design of experiments was applied to propose correlations between the synthesis parameters and catalyst properties. Several factors, which are effective on the specifications of the prepared multi‐modal alumina, were analyzed and the dominant factors were identified. The results predicted by the model were in agreement with the experimental data. The analysis of the results showed that the prepared optimal sample had an average pore diameter and specific surface area of 21.2 nm and 341 m 2 /gr, respectively. For the prepared catalyst, N 2 adsorption/desorption measurements showed a multimodal pore structure ranging from 2 to 100 nm in size.Finally, an HDM catalyst was prepared based on optimum alumina. The activity and performance of the prepared catalyst were compared with those of the commercial catalyst. At low space times, V‐TPP conversion for commercial and prepared catalysts were 38.9 and 49.5 percent, respectively, showing a higher activity for the prepared catalyst.