Nano-solid heteropoly acid, heteropolybase catalyst suitable for producing biological diesel oil and application thereof

Abstract

The present invention pertains to the technical field of biological diesel preparation, in particular to the technical field of nanometer solid catalyst. The present invention discloses a nanometer solid heteropoly acid and heteropoly alkali catalyst for biological diesel preparation and the application thereof. The grain diameter of the nanometer catalyst is 25 to 50nm; wherein, the nanometer solid heteropoly acid is selected from one or the combination of S2O8<2-> / ZrO2-TiO2, S2O8<2-> / Gamma-Al2O3-SiO2, H4SiW12O40 / SiO2 and H4PMo11VO40.xH2O; the nanometer solid heteropoly alkali is selected from one or the combination of K2CO3 / Gamma-Al2O, KF / CaO, KF / CaO-MgO and Co2Mo / MgO2Al2O3. Compared with the existing catalyst, the catalyst provided by the present invention has the outstanding advantages of high activity, high intensity, long service life, good regenerability and repeated use, etc.

Description

Nano solid heteropolyacid, heteropolybase catalyst and application for preparing biodiesel technical field The invention belongs to the technical field of biodiesel preparation, and in particular relates to the preparation of a nanometer solid heteropolyacid and heteropolybase catalyst and its application in biodiesel production. Background technique Due to the depletion of fossil fuels, the high oil price and the increasing consumption of diesel oil, the production of biodiesel from oil crops and animal fats is an important way to solve the shortage of oil. As an alternative energy source, biodiesel is not only a renewable energy source, but also an environmentally friendly "green energy source". The catalyst is the main factor that determines the biodiesel production technology, process route and production cost. At present, liquid acid (concentrated sulfuric acid) and liquid alkali (KOH, NaOH) are widely used as catalysts in the industrial production of biodiesel. The...

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Problems solved by technology

The purpose of the present invention is to overcome the defect of prior art, develop a kind of nanometer solid heteropolyacid, heteropolyalkali that is suitable for biodiesel preparation, utilize this catalyst to catalyze and can significantly improve the conversion efficiency of biodiesel, to overcome existing catalyst Agglomeration of nanoparticles, and key technical problems such as saponification and catalyst immobilization in the process of preparing biodiesel

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