TY - JOUR
T1 - Development of highly efficient solid acid catalysts supported on mesoporous KIT-6 for esterification of oleic acid
AU - Shakeel, Usama
AU - Hussain, Murid
AU - Sheikh, Rizwan
AU - Ahmed, Ashfaq
AU - Nazir, Muhammad Shahid
AU - Yang, Wenshu
AU - Shezad, Nasir
AU - Akhter, Parveen
AU - Park, Young Kwon
N1 - Publisher Copyright:
© 2021, The Korean Institute of Chemical Engineers.
PY - 2021/5
Y1 - 2021/5
N2 - This study aimed at the synthesis of heterogeneous acid catalysts by incorporating 12 tungstophosphoric acid (HPW) over mesoporous silica support KIT-6 via impregnation and sol-gel methods to improve the catalytic efficiency of the esterification reaction. The catalytic activity of the KIT-6 supported catalysts was investigated for esterification of oleic acid in the presence of MeOH. Synthesized catalysts were analyzed using scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and Fourier transform infrared (FTIR) spectroscopy techniques. Characterization results showed the variation in porosity, roughness, presence of SiO2 and kegging structure after successful deposition of HPW over KIT-6 surface. Additionally, the textural property of synthesized catalysts was compared with highly active HPW and sulfated KIT-6. The ordered structure of mesoporous silica KIT-6 facilitated the dispersion of HPW resulting in better catalytic stability and activity. To evaluate the impact of synthesizing technique on catalytic activity and effectiveness of heterogeneous acid catalysts, loading of HPW over KIT-6 mesoporous silica was controlled between 10 to 30 wt%. Catalysts synthesized by impregnation and sol-gel methods showed the highest catalytic activity with 30-IM and 25-SG, respectively. The enhanced performance was ascribed to the improved textural property and amount of HPW, which led to higher activity, stability and reusability.
AB - This study aimed at the synthesis of heterogeneous acid catalysts by incorporating 12 tungstophosphoric acid (HPW) over mesoporous silica support KIT-6 via impregnation and sol-gel methods to improve the catalytic efficiency of the esterification reaction. The catalytic activity of the KIT-6 supported catalysts was investigated for esterification of oleic acid in the presence of MeOH. Synthesized catalysts were analyzed using scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and Fourier transform infrared (FTIR) spectroscopy techniques. Characterization results showed the variation in porosity, roughness, presence of SiO2 and kegging structure after successful deposition of HPW over KIT-6 surface. Additionally, the textural property of synthesized catalysts was compared with highly active HPW and sulfated KIT-6. The ordered structure of mesoporous silica KIT-6 facilitated the dispersion of HPW resulting in better catalytic stability and activity. To evaluate the impact of synthesizing technique on catalytic activity and effectiveness of heterogeneous acid catalysts, loading of HPW over KIT-6 mesoporous silica was controlled between 10 to 30 wt%. Catalysts synthesized by impregnation and sol-gel methods showed the highest catalytic activity with 30-IM and 25-SG, respectively. The enhanced performance was ascribed to the improved textural property and amount of HPW, which led to higher activity, stability and reusability.
KW - 12 Tungstophosphoric Acid (HPW)
KW - Esterification
KW - Impregnated
KW - KIT-6
KW - Sol-gel
UR - http://www.scopus.com/inward/record.url?scp=85105186410&partnerID=8YFLogxK
U2 - 10.1007/s11814-021-0754-z
DO - 10.1007/s11814-021-0754-z
M3 - Article
AN - SCOPUS:85105186410
SN - 0256-1115
VL - 38
SP - 966
EP - 974
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 5
ER -