Studies On The Synthesis And Properties Of Phosphonic Acid-functionalized Catalytic Materials In The Preparation Of Biodiesel

Biodiesel production has become an intense research area because of rapidly depletingenergy reserves and increasing petroleum prices together with environmental concerns.Biodiesel has many well-known advantages: clean engine emissions, renewable resources,biodegradability, lower toxicity, higher security of use and storage and ability to be blended inany proportion with petroleum-based diesel fuel. Because the materials oforganotriphosphonicacid functional groups were rarely investigative in the biodieselproduction, this paper focused on the methods of materials modified by phosphonic acid andthe optimization of the catalytic performance in the biodiesel production over the materials oforganotriphosphonicacid functional groups.1. Phosphonic acid functionalized diatomite and iron oxide were synthesized with diatomiteand iron oxide as substrates. Investigative on the optimization of the catalytic performance inthe biodiesel production over the materials of phosphonic acid functionalized diatomite andiron oxide. The reaction parameters of phosphonic acid functionalized diatomite includingcatalyst amount, ethanol to oleic acid molar ratio and reaction temperature have beenoptimized by response surface methodology (RSM) using the Box-Behnken model. The bestconversion ratio of oleic acid could reach95.13%under the reaction conditions with10.32%of catalyst amount and10.3:1of ethanol to oleic acid molar ratio at87.8oC. The reactionparameters of phosphonic acid functionalized iron oxide including catalyst amount, ethanol tooleic acid molar ratio and reaction temperature have been optimized by response surfacemethodology (RSM) using the Box-Behnken model. The best conversion ratio of oleic acidcould reach92.91%under the reaction conditions with9.58%of catalyst amount and8.7:1ofethanol to oleic acid molar ratio at93.2oC.2. Above all, it investigative on the methods of synthesis ferric-alginate, Then, phosphonicacid functionalized ferric-alginate were synthesized with ferric-alginate as substrates. Thereaction parameters including catalyst amount, ethanol to oleic acid molar ratio and reactiontemperature have been optimized by response surface methodology (RSM) using theBox-Behnken model. It was found that the reaction temperature was the most significantfactor, and the best conversion ratio of oleic acid could reach93.17%under the reaction conditions with9.53%of catalyst amount and8.62:1of ethanol to oleic acid molar ratio at91.0oC.3. The immobilized lipase LVK have been synthesized through adsorption method. itinvestigative on the optimization of the catalytic performance in the biodiesel production overthe materials of the immobilized lipase LVK. The reaction parameters of the immobilizedlipase LVK including catalyst amount, ethanol to oil molar ratio, reaction temperature, watercontent and reaction time have been optimized by response surface methodology (RSM) usingthe Box-Behnken model. The best conversion ratio of biodiesel could reach86.74%under thereaction conditions with22.15%of catalyst amount,4.45:1of ethanol to oil molar ratio at44.2oC,7.45%of water content and12.96h reaction time.