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All Journal The Journal of Pure and Applied Chemistry Research Molekul: Jurnal Ilmiah Kimia
Risfidian Mohadi
Sriwijaya University
Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology Medicine & Pharmacology

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Calcium Oxide Catalyst Based on Quail Eggshell for Biodiesel Synthesis from Waste Palm Oil Risfidian Mohadi; Abi Sueb; Kiki Anggraini; Aldes Lesbani
The Journal of Pure and Applied Chemistry Research Vol 7, No 2 (2018): Edition May-August 2018
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1179.267 KB) | DOI: 10.21776/ub.jpacr.2018.007.02.390

Abstract

Calcium oxide decomposed from quail eggshell was used as catalyst for biodiesel synthesis from waste palm oil. Prior to being used, the quail eggshell was decomposed at 600-1100 oC to form calcium oxide and it was characterized by X-Ray measurement, FTIR and SEM spectroscopy to analyze the functional groups and the surface morphology, followed by N2 adsorption desorption methods to determine the surface area. The results of X-Ray analysis powder pattern show that the decomposition of quail eggshell at 900 oC gave calcium oxide that has similar characteristic to the standard CaO from Joint Committee of Powder Diffraction Standard (JCPDS). The FTIR spectrum indicated vibration of calcium oxide from quail eggshell have a similar pattern with the calcium oxide of the standard. The SEM analysis showed that morphology of quail eggshell was changed after decomposition at 900 oC and it have the mesoporous structure.  The biodiesel from waste palm oil was synthesized using CaO catalyst from quail eggshell decomposed at 900 oC. The biodiesel product has density of 0.86 g/cm3, viscosity of 5.50 mm2/s, free fatty acid of 0.56 mg/KOH, and iodine number of 60.49 g I2/100g, respectively. All those biodiesel characteristics meet to the biodiesel standard by the Indonesian National Standard (SNI).
Cr/Al Pillared Bentonite and Its Application on Congo Red and Direct Blue Removal Muhammad Said; Afifah Rahma Dian; Risfidian Mohadi; Aldes Lesbani
Molekul Vol 15, No 3 (2020)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.732 KB) | DOI: 10.20884/1.jm.2020.15.3.594

Abstract

Bentonite was modified through pillarization with metal oxide Cr/Al in 2:1 and 1:2 ratio to obtain larger basal spacing of bentonite-layered structure. Pillarization was conducted via intercalation method at room temperature followed by calcination. The result was characterized by using XRD and FT-IR Spectrophotometer. XRD pattern shown pillarization by Cr/Al 2:1 ratio gave peak at 2θ 5.3° which is correspond to d = 16.4 Å. At 1:2 Cr/Al ratio, peak appears at 2θ 6.4° that is related to d = 13.7 Å. FTIR Spectroscopy measurement gave inconclusive result. The Cr/Al pillared bentonite at 2:1 ratio was applied as adsorbent on Congo red and Direct blue dyes. The result indicates the adsorption follows Freundlich isotherm. Adsorption rate for both dyes follows pseudo-second order with rate constant of pillared bentonite higher than natural one. Adsorption isotherm concludes that Freundlich isotherm is favorable compare to Langmuir. Thermodynamic evaluation suggests that isotherm occurs spontaneously in an exothermic process.
Co-Authors Abi Sueb Afifah Rahma Dian Aldes Lesbani Kiki Anggraini Muhammad Said