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A method for the synthesis of biodiesel catalyzed by a solid base with a short nanorod structure

A nanorod-shaped, synthetic biology technology, applied in chemical instruments and methods, biofuels, chemical/physical processes, etc., can solve problems such as difficult separation, recycling and reuse, insufficient stability of attapulgite structures, and environmental pollution by wastewater

Active Publication Date: 2020-11-20
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous alkali KOH, NaOH solution catalysis has some defects, such as difficult to separate, recycle and reuse, corrode equipment, and produce a large amount of waste water after treatment to pollute the environment
Patent 201310096219.1 discloses a heterogeneous catalyst for attapulgite loaded with potassium hydroxide, which is prepared by treating natural attapulgite raw materials with acid, and then loading potassium hydroxide and roasting at 400°C. The stability of the rod structure is not strong enough, and the carrier will corrode and collapse after loading potassium hydroxide

Method used

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  • A method for the synthesis of biodiesel catalyzed by a solid base with a short nanorod structure
  • A method for the synthesis of biodiesel catalyzed by a solid base with a short nanorod structure
  • A method for the synthesis of biodiesel catalyzed by a solid base with a short nanorod structure

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1. Nanorod-shaped solid base KF@ZrO 2 -CeO 2 preparation of

[0023] Zr(NO 3 ) 4 ·5H 2 O, Ce(NO 3 ) 3 ·6H 2 O according to the molar ratio of 1:9, specifically add 0.5mmol Zr(NO 3 ) 4 ·5H 2 O and 4.5mmol Ce(NO 3 ) 3 · 6H 2 O was dissolved in 40ml of deionized water to form solution A with a total molar concentration of 0.125mol / L, and 0.48mol of NaOH was dissolved in 40ml of deionized water to form solution B with a molar concentration of 12mol / L. Pour into solution A, stir at 40°C for 30min, then transfer the mixed sol into a polytetrafluoroethylene lining for crystallization at 100°C for 24h, cool to room temperature, and filter the formed precipitate with alcohol:water The mixed solution with a mass ratio of 1:1 was washed to become neutral, and the filter cake was dried at a constant temperature of 100°C for 12 hours, then placed in a box-type muffle furnace, and roasted at 400°C for 5 hours at a rate of 2°C / min. After cooling, That is, a short nanorod...

Embodiment 2

[0026] Example 2 The operation steps are the same as in Example 1, but the solid base catalyst is 7.5% KF@ZrO 2 -CeO 2 , where KF and ZrO 2 -CeO 2 The mass ratio is 0.075 ， The mass yield of biodiesel product was 53.56%.

Embodiment 3

[0027] Example 3 The operation steps are the same as in Example 1, but the solid base catalyst is 10% KF@ZrO 2 -CeO 2 , where KF and ZrO 2 -CeO 2 The mass ratio is 0.1 ， The mass yield of biodiesel product was 70.52%.

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Abstract

A short nanorod-shaped solid base KF@ZrO 2 ‑CeO 2 Catalytic synthesis of biodiesel using ZrO 2 ‑CeO 2 As a carrier, the alkaline substance KF is loaded on ZrO by impregnation and roasting. 2 ‑CeO 2 On the carrier, a short nanorod-shaped solid alkali catalyst KF@ZrO with a uniformly dispersed alkali active site and a stable structure that is not easily corroded and collapsed by KF is obtained. 2 ‑CeO 2 , its short nanorod length is 100~200nm, diameter is 7~15nm, and specific surface area is 29~58m 2 / g, alkalinity pKa is 9.3~15.0, suitable for catalyzing the transesterification reaction of long-chain oils and alcohols to synthesize biodiesel. The mass ratio of catalyst to oil is 0.05:1, the molar ratio of alcohol to oil is 20:1, and the reaction temperature is At 65°C and reaction time of 5 hours, the biodiesel yield reached 99.81%.

Description

technical field [0001] The invention belongs to the field of biomass energy catalysis, and relates to a solid base KF@ZrO with a short nanorod structure 2 -CeO 2 Method for catalytic synthesis of biodiesel. Background technique [0002] Biodiesel is a renewable energy source. Fatty acid monoalkyl esters, fatty acid methyl esters are the most representative, are obtained through transesterification of animal and plant waste oils and alcohols (methanol or ethanol). Transesterification can be catalyzed by base or acid, and base catalysis is faster than acid catalysis. Homogeneous alkali KOH, NaOH solution catalysis has some defects, such as difficult separation, recycling and reuse, corrosion of equipment, and post-processing produces a large amount of wastewater polluting the environment. Patent 201310096219.1 discloses a heterogeneous catalyst for attapulgite loaded with potassium hydroxide, which is prepared by treating natural attapulgite raw materials with acid, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/135B01J35/10B01J37/10B01J37/08B01J37/02B01J37/03C11C3/10C10L1/02
CPCC10L1/02C11C3/10B01J23/002B01J27/135B01J37/0201B01J37/035B01J37/08B01J37/088B01J37/10B01J35/613Y02E50/10
Inventor 刘跃进唐红娟李勇飞刘宁王亮余荣栋
Owner XIANGTAN UNIV