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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Catalyst characteristics and performance of silica-supported zinc for hydrodeoxygenation of phenol
AU - Pourzolfaghar, H.
AU - Abnisa, F.
AU - Wan Daud, W.M.A.
AU - Aroua, M.K.
AU - Mahlia, T.M.I.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - The present investigation aimed to study the physicochemical characteristics of supported catalysts comprising various percentages of zinc dispersed over SiO2. The physiochemical properties of these catalysts were surveyed by N2physisorption (BET), thermogravimetry analysis (TGA), H2temperature-programmed reduction, field-emission scanning electron microscopy (FESEM), inductively coupled plasma-optical emission spectrometry (ICP-OES), and NH3temperature-programmed desorption (NH3-TPD). In addition, to examine the activity and performance of the catalysts for the hydrodeoxygenation (HDO) of the bio-oil oxygenated compounds, the experimental reaction runs, as well as stability and durability tests, were performed using 3% Zn/SiO2as the catalyst. Characterization of silica-supported zinc catalysts revealed an even dispersion of the active site over the support in the various dopings of the zinc. The acidity of the calcinated catalysts elevated clearly up to 0.481 mmol/g. Moreover, characteristic outcomes indicate that elevating the doping of zinc metal led to interaction and substitution of proton sites on the SiO2surface that finally resulted in an increase in the desorption temperature peak. The experiments were performed at temperature 500 °C, pressure 1 atm; weight hourly space velocity (WHSV) 0.32 (h-1); feed flow rate 0.5 (mL/min); and hydrogen flow rate 150 (mL/min). Based on the results, it was revealed that among all the prepared catalysts, that with 3% of zinc had the highest conversion efficiency up to 80%. However, the selectivity of the major products, analyzed by gas chromatography flame-ionization detection (GC-FID), was not influenced by the variation in the active site doping.
AB - The present investigation aimed to study the physicochemical characteristics of supported catalysts comprising various percentages of zinc dispersed over SiO2. The physiochemical properties of these catalysts were surveyed by N2physisorption (BET), thermogravimetry analysis (TGA), H2temperature-programmed reduction, field-emission scanning electron microscopy (FESEM), inductively coupled plasma-optical emission spectrometry (ICP-OES), and NH3temperature-programmed desorption (NH3-TPD). In addition, to examine the activity and performance of the catalysts for the hydrodeoxygenation (HDO) of the bio-oil oxygenated compounds, the experimental reaction runs, as well as stability and durability tests, were performed using 3% Zn/SiO2as the catalyst. Characterization of silica-supported zinc catalysts revealed an even dispersion of the active site over the support in the various dopings of the zinc. The acidity of the calcinated catalysts elevated clearly up to 0.481 mmol/g. Moreover, characteristic outcomes indicate that elevating the doping of zinc metal led to interaction and substitution of proton sites on the SiO2surface that finally resulted in an increase in the desorption temperature peak. The experiments were performed at temperature 500 °C, pressure 1 atm; weight hourly space velocity (WHSV) 0.32 (h-1); feed flow rate 0.5 (mL/min); and hydrogen flow rate 150 (mL/min). Based on the results, it was revealed that among all the prepared catalysts, that with 3% of zinc had the highest conversion efficiency up to 80%. However, the selectivity of the major products, analyzed by gas chromatography flame-ionization detection (GC-FID), was not influenced by the variation in the active site doping.
KW - Bio-oil
KW - Heterogeneous catalyst
KW - Hydrodeoxygenation (HDO)
KW - Phenol
KW - Zinc
KW - Ammonia
KW - Catalyst activity
KW - Desorption
KW - Durability
KW - Field emission microscopes
KW - Gas chromatography
KW - Inductively coupled plasma
KW - Ionization of gases
KW - Oil well testing
KW - Optical emission spectroscopy
KW - Scanning electron microscopy
KW - Silica
KW - Silicon
KW - Thermogravimetric analysis
KW - Desorption temperatures
KW - Field emission scanning electron microscopy
KW - Gas chromatography-flame ionization detections
KW - Inductively coupled plasma-optical emission spectrometry
KW - Physicochemical characteristics
KW - Physio-chemical properties
KW - Thermogravimetry analysis
KW - Weight hourly space velocity
KW - Catalyst supports
U2 - 10.3390/en13112802
DO - 10.3390/en13112802
M3 - Journal article
VL - 13
JO - Energies
JF - Energies
SN - 1996-1073
IS - 11
M1 - 2802
ER -