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• W2907281397 abstract "The developments of cheap and environmentally benign synthetic methods remain the challenges facing scientists. Kaolin is an abundant and non-toxic mineral over the expensive and toxic aluminium alkoxides or inorganic salts used in the synthesis of mesoporous gamma alumina for industrial application. In this study, a novel synthesis of mesoporous γ-Al2O3 from Kano kaolin in the presence of non-toxic surfactant, polyoxyethylene (40) stearate (PS), is reported. For comparison alumina is synthesized using PEG-6000. To explore the effect of surfactant mixing mode, PS was added to the boehmite precursor prior and after precipitation. Furthermore, the influence of varying PS concentration and aging time were also studied. The mesoporous γ-Al2O3 was modified with NaOH using the wet impregnation method, and tested for the methanolysis of corn oil by batch reaction process. The reaction conditions for the methanolysis are 5% catalyst, 67 oC temperature, 1:15 oil to methanol molar ratio and 3 hours reaction time. The kaolin, alumina and the catalysts were characterized using X-Ray Fluorescence (XRF), Thermogravimetric-Derivative Thermal Analysis (TG-DTA), X-Ray Powder Diffraction (XRD), Fourier Transform Infrared (FTIR), N2 Adsorption-Desorption, Field Emission Scanning Electron Microscopy (FESEM), Solid State 27Al MAS NMR, Basic Back Titration and Temperature-Programmed Desorption of CO2 (CO2-TPD). The product biodiesel was analyzed using Fourier Transform Infrared-Attenuated Total Reflection Analysis (FTIR-ATR), Nuclear Magnetic Resonance spectroscopy (1H NMR) and Gas Chromatography-Flame Ionization Detector (GC-FID). Structural properties and morphology of the mesoporous γ-Al2O3 was found to improve with increasing surfactant amount from 0.45 g to 1.8 g and aging time from 1 to 2 days then dropped beyond that. Mesoporous γ-Al2O3 synthesized with 1.8 g PS, mixed after precipitation and age for 2 days possessed a surface area (SA) of 222.7 m2/g, narrow pore size distribution (PSD) of 5.6 nm and pore volume (PV) of 0.45 cm3/g. Whereas higher SA of 319.2 m2/g, PSD of 2.7 nm and PV of 0.42 cm3/g were obtained with mixing prior to precipitation. Although, alumina synthesized with PEG has higher SA of 365.1 m2/g, nevertheless, the one with PS have better thermal stability. Response surface methodology (RSM) was applied for the optimization of methanolysis reaction using four-level factorial Box-Behnken Design (BBD). Up to 98.9% yield was obtained using mesoporous γ-Al2O3 modified with 15% NaOH, 6% catalyst loading, 1:15 oil:methanol molar ratio and 2 hours reaction time. From kinetics study, the activation energy, 67.7 kJ mol-1, fall within the range 26-82 kJ mol-1 indicating that the methanolysis was kinetically controlled. The high value of k, 0.03386 min-1, was attributed to the presence of high levels of unsaturated FFA in corn oil. While from the thermodynamics evaluation the positive values of enthalpy and Gibb’s free energy implied the methanolysis reaction is endothermic and non-spontaneous, whereas the negative entropy value suggested it is reversible. Result from catalyst reusability tests revealed that the catalyst is relatively stable." @default.
• W2907281397 created "2019-01-11" @default.
• W2907281397 creator A5006395538 @default.
• W2907281397 date "2016-09-01" @default.
• W2907281397 modified "2023-09-24" @default.
• W2907281397 title "Sodium modified mesoporous gamma-alumina from Kano kaolin in methanolysis of corn oil" @default.
• W2907281397 cites W1021532766 @default.
• W2907281397 cites W1201809470 @default.
• W2907281397 cites W1227135935 @default.
• W2907281397 cites W1424568705 @default.
• W2907281397 cites W1531187607 @default.
• W2907281397 cites W1543600721 @default.
• W2907281397 cites W1546100370 @default.
• W2907281397 cites W1599017533 @default.
• W2907281397 cites W1749749800 @default.
• W2907281397 cites W1762980382 @default.
• W2907281397 cites W1845406955 @default.
• W2907281397 cites W1967924489 @default.
• W2907281397 cites W1968450788 @default.
• W2907281397 cites W1968914076 @default.
• W2907281397 cites W1969127681 @default.
• W2907281397 cites W1970910859 @default.
• W2907281397 cites W1971318772 @default.
• W2907281397 cites W1974805352 @default.
• W2907281397 cites W1976138874 @default.
• W2907281397 cites W1976512733 @default.
• W2907281397 cites W1978546299 @default.
• W2907281397 cites W1980433944 @default.
• W2907281397 cites W1984184849 @default.
• W2907281397 cites W1988119157 @default.
• W2907281397 cites W1988677468 @default.
• W2907281397 cites W1989689092 @default.
• W2907281397 cites W1990988368 @default.
• W2907281397 cites W1996355982 @default.
• W2907281397 cites W1998767177 @default.
• W2907281397 cites W1999944105 @default.
• W2907281397 cites W2000822304 @default.
• W2907281397 cites W2001249823 @default.
• W2907281397 cites W2001637390 @default.
• W2907281397 cites W2002443506 @default.
• W2907281397 cites W2004311808 @default.
• W2907281397 cites W2005885431 @default.
• W2907281397 cites W2008453719 @default.
• W2907281397 cites W2009187208 @default.
• W2907281397 cites W2011254969 @default.
• W2907281397 cites W2016975090 @default.
• W2907281397 cites W2018341779 @default.
• W2907281397 cites W2020485478 @default.
• W2907281397 cites W2021658489 @default.
• W2907281397 cites W2021825623 @default.
• W2907281397 cites W2022729726 @default.
• W2907281397 cites W2023372319 @default.
• W2907281397 cites W2024163020 @default.
• W2907281397 cites W2025597076 @default.
• W2907281397 cites W2025969070 @default.
• W2907281397 cites W2027309060 @default.
• W2907281397 cites W2027325998 @default.
• W2907281397 cites W2028177377 @default.
• W2907281397 cites W2029425909 @default.
• W2907281397 cites W2033263260 @default.
• W2907281397 cites W2033429734 @default.
• W2907281397 cites W2033753529 @default.
• W2907281397 cites W2035392037 @default.
• W2907281397 cites W2036271777 @default.
• W2907281397 cites W2037047513 @default.
• W2907281397 cites W2038538498 @default.
• W2907281397 cites W2038679275 @default.
• W2907281397 cites W2038778372 @default.
• W2907281397 cites W2039987537 @default.
• W2907281397 cites W2043182463 @default.
• W2907281397 cites W2046606748 @default.
• W2907281397 cites W2046728272 @default.
• W2907281397 cites W2047274900 @default.
• W2907281397 cites W2047589610 @default.
• W2907281397 cites W2047945863 @default.
• W2907281397 cites W2049621044 @default.
• W2907281397 cites W2050237949 @default.
• W2907281397 cites W2053563679 @default.
• W2907281397 cites W2054925743 @default.
• W2907281397 cites W2055324286 @default.
• W2907281397 cites W2058526560 @default.
• W2907281397 cites W2058784876 @default.
• W2907281397 cites W2059436692 @default.
• W2907281397 cites W2060519861 @default.
• W2907281397 cites W2060606294 @default.
• W2907281397 cites W2061161111 @default.
• W2907281397 cites W2062334883 @default.
• W2907281397 cites W2063020323 @default.
• W2907281397 cites W2064675028 @default.
• W2907281397 cites W2067174805 @default.
• W2907281397 cites W2068925067 @default.
• W2907281397 cites W2071893643 @default.
• W2907281397 cites W2072693585 @default.
• W2907281397 cites W2073236381 @default.
• W2907281397 cites W2076337967 @default.
• W2907281397 cites W2078542135 @default.
• W2907281397 cites W2078877281 @default.
• W2907281397 cites W2080565063 @default.
• W2907281397 cites W2083000967 @default.
• W2907281397 cites W2083751264 @default.

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