Acidity and catalytic performance of Yb-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mi>SO</mml:mi><mml:mn>4</mml:mn><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo></mml:mrow></mml:msubsup></mml:math>/Zr in comparison with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mi>SO</mml:mi><mml:mn>4</mml:mn><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo></mml:mrow></mml:msubsup></mml

Sani, Yahaya Muhammad; Alaba, Peter Adeniyi; Raji-Yahya, Aisha Olatope; Aziz, Abdul; Daud, Wan Mohd Ashri Wan

doi:10.1016/j.jtice.2015.07.016

Cited by 17 publications

(1 citation statement)

References 39 publications

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“…Therefore, the use of homogeneous catalyst for biodiesel production became unfavourable. The heterogeneous catalyst system could be an attractive solution to solve these disadvantages because the heterogeneous catalyst could be easily separable, reusable and inexpensive [8][9][10] are several heterogeneous catalysts have been studied to yield biodiesel from used frying oil [11][12][13][14][15][16]. Nevertheless, the solid catalysts exhibited some disadvantages such as expensive, not active, mass tranfer limitation and easily deactivated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Catalytic Activity of Magnesium Hydroxide Fluorides for Production of Biodiesel: Influence of Different Mg/F Ratios

Indrayanah¹,

Ediati²,

Hartanto³

et al. 2018

Asian J. Chem.

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The magnesium hydroxide fluorides having formula MgFx(OH)2-x with diverse Mg/F ratios were prepared by fluorolytic sol-gel method. The XRD, FT-IR, SEM, nitrogen adsorption-desorption, TG/DTG and pyridine FT-IR were performed to study properties and characteristics of samples. Based on the characterization results, the samples show dissimilar structure, thermal stability, porosity, surface acidity and morphology. In addition, the average pore diameter and total pore volume of the MgFx(OH)2-x decrease with increase in fluorine contents. The activity of solids as heterogeneous catalyst for production of biodiesel from used frying oil exhibits that MgFx(OH)2-x with Mg/F ratio of 1:2 gives higher yield of biodiesel (75.29 %) compared to MgFx(OH)2-x (x < 2). The higher activity of MgFx(OH)2-x (x = 2) catalyst for biodiesel production can be attributed to acid sites (Lewis and Brønsted), average pore diameter and total pore volume. Moreover, performance of catalyst decreases after three cycles.

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