Adsorption of Free Fatty Acid from Crude Palm Oil on Magnesium Silicate Derived from Rice Husk | Zendy

Weerawat Clowutimon | Zendy; Prakob Kitchaiya | Zendy; Pornsawan Assawasaengrat | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Adsorption of Free Fatty Acid from Crude Palm Oil on Magnesium Silicate Derived from Rice Husk

Author(s) -

Weerawat Clowutimon,

Prakob Kitchaiya,

Pornsawan Assawasaengrat

Publication year - 2011

Publication title -

engineering journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.246

H-Index - 20

ISSN - 0125-8281

DOI - 10.4186/ej.2011.15.3.15

Subject(s) - husk , adsorption , palm oil , magnesium , silicate , chemistry , fatty acid , pulp and paper industry , food science , botany , biochemistry , organic chemistry , biology , engineering

Magnesium silicate with various silica and magnesium oxide ratios (SiO2/MgO ratios) was used as the adsorbent for a study of adsorption of free fatty acid (FFA) in crude palm oil (CPO). Magnesium silicate was prepared from magnesium nitrate or magnesium sulfate solution precipitated with a solution of sodium silicate derived from rice husk. SiO2/MgO ratios of the magnesium silicate synthesized from magnesium nitrate and magnesium sulfate were 3.93, 3.75, 2.74, 2.40, 1.99 and 3.96, 3.61, 3.51, 2.91, 2.69, respectively. FFA adsorption on the magnesium silicate was carried out by adding 1 gram of the adsorbent to 50 grams of CPO and shaking for 1 hour at 50oC. It was found that SiO2/MgO ratio of 1.99 had the highest adsorption capacities of 185 mg of FFA per gram of adsorbent. In addition, increasing of SiO2/MgO ratios of magnesium silicate was found to reduce the adsorption capacities due to decreasing of FFA chemisorption. The effect of dosage amount to equilibrium adsorption capacities were carried out by adding different amount of magnesium silicate (SiO2/MgO ratio of 1.99) to 50 grams of CPO. The result showed that efficiency decreased when dosage increased. The Fruendlich and Langmuir isotherm were applied to describe this absorption system. The values of maximum sorption capacity (Q0) and Langmuir's sorption affinity (b) in the Langmuir equation obtained by linear-regression were minus values which were physically meanigless. Thus, FFA adsorption on magnesium silicate was both physisorption and chemisorption and well represented by the Fruenlich isotherm

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research