CN-117106495-B - Liquid nano additive for diesel oil and preparation method thereof

Abstract

The invention discloses a diesel oil liquid nano additive and a preparation method thereof, wherein the diesel oil liquid nano additive comprises, by mass, 0.02-0.5% of rare earth-based nano catalyst, 52-67% of cetane number improver, 1-5% of smoke suppressor, 3-19% of detergent dispersant, 3-8% of pour point depressant, 7-20% of antioxidant and 5-13% of lubricant. The invention can realize the catalytic combustion of diesel oil, promote the combustion of CO, HC and soot at the same time, reduce the formation of particulate matters in the main combustion period, reduce the emission of tail gas pollutants, finally realize the energy conservation, the power enhancement and the ultralow emission of tail gas, obviously improve the heat value of the diesel oil, ensure that the energy saving efficiency reaches more than 37 percent, and have obvious energy saving effect.

Inventors

• ZHAN GUOWU
• SONG YIBO
• ZHOU ZINING
• YIN CAI
• YU YAJIE
• LIN JIANBIN
• GUO FANGSONG

Assignees

• 华侨大学

Dates

Publication Date

20260505

Application Date

20230811

Claims (3)

1. 1. A liquid nano additive for diesel oil is prepared from rare-earth base nano catalyst (0.02-0.5 wt.%), cetane improver (52-67), smoke suppressor (1-5), detergent disperser (3-19), pour point depressant (3-8), antioxidizing agent (7-20), lubricant (5-13) and surfactant (2-10:1), The antioxidant is 2, 6-di-tert-butyl mixed phenol, The rare earth-based nano catalyst consists of a carrier and catalytic metal loaded on the carrier, the carrier is porous nano CeO 2 obtained by high-temperature calcination of a Ce-based metal organic framework material, the particle size of the porous nano CeO 2 is 10-1000 nm, the specific surface area is 100-150 m 2 g -1 , the total pore volume is 0.1-0.5 cm 3 g -1 , the catalytic metal is at least one of nickel, iron, manganese, zinc, copper, cobalt, gold, silver and platinum, and the loading amount of the catalytic metal is 1-6wt% of the carrier; The cetane number improver is at least one of isooctyl nitrate, dimethoxyethane and ethyl lactate, The smoke suppressor is at least one of ferrocene, barium sulfate, tetrahydrofuran and ethyl nitrate, The detergent dispersant is at least one of succinimide, tetralin and alkyl calcium salicylate, The pour point depressant is polyethylene fumaric acid copolymer and/or ethylene-vinyl acetate copolymer, The lubricant is long-chain fatty acid methyl ester and/or ethylene glycol dinitrate.
2. 2. The method for preparing the liquid nano additive for diesel oil according to claim 1, which is characterized by comprising the following steps: (1) Pouring the rare earth-based nano catalyst into a cetane improver, adding a surfactant, carrying out ultrasonic oscillation for 0.5-2 h to complete dispersion, stirring and mixing at the rotating speed of 200-350 r/min for 30-50 min, and naturally standing for 30-60 min; (2) Adding a lubricant, an antioxidant, a pour point depressant and a detergent dispersant into the material obtained in the step (1), and stirring and mixing at a rotating speed of 120-250 r/min for 20-40 min; (3) Adding smoke suppressor into the material obtained in the step (2), stirring and mixing at a rotating speed of 100-400 r/min for 60-90 min until the smoke suppressor is completely dissolved, and then naturally standing for 1-2h to obtain the diesel oil liquid nano additive.
3. 3. The method according to claim 2, wherein the surfactant is at least one of cetyltrimethylammonium bromide, cetyltrimethylammonium chloride and sodium dodecyl sulfate.

Description

Liquid nano additive for diesel oil and preparation method thereof Technical Field The invention belongs to the technical field of diesel additives, and particularly relates to a liquid nano additive for diesel and a preparation method thereof. Background Global warming is a consequence of human behavior affecting the climate change of the earth, where the leading cause of global warming is "carbon dioxide". Automobiles are major contributors to the total amount of pollutant emissions, which emit carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx) and particulate/soot (PM) in excess of 90%, with diesel NOx emissions exceeding 80% and PM exceeding 90% of the total automobile emissions, with increased urgency to enhance mobile source pollution abatement. The method aims at saving energy, reducing pollution and improving environment, and how to improve the combustion efficiency of diesel oil, reduce the energy consumption and reduce pollution becomes a key point of research. There are many methods for improving the combustion efficiency of diesel oil to reduce the pollution of tail gas, so that the diesel oil additive is one of the most effective and economical methods at present, and the combustion performance of the fuel oil can be improved and the emission of harmful substances can be reduced under the condition that the structures of a vehicle and an engine are not changed and equipment is not increased. The principle is that by adding certain active components, the combustion mechanism is changed, the combustion of fuel is promoted, and the combustion of CO, HC and PM is promoted at the same time, so that the aim of reducing the emission of tail gas pollutants is fulfilled. The focus of previous researches is mostly focused on organic compounds with high oxygen content and single components such as alcohol, ether, lipid and the like, but the additive has the problems of single variety, large addition amount, limitation on improving the quality of diesel oil and the like. Therefore, research and development of multifunctional compound diesel additives is widely focused. The composite diesel additive generally comprises cetane number improver, detergent dispersant, pour point depressant, antioxidant, lubricant, combustion catalyst and the like. The combustion catalyst can accelerate the atomization and evaporation of the fuel oil, promote the fuel oil to be uniformly mixed with air, and realize the rapid and complete combustion of the fuel oil, so that the fuel oil consumption and the pollutant emission can be reduced, and researchers at home and abroad have the most extensive application research. Numerous studies have shown that the use of cerium-based diesel additives can reduce the peak concentration of diesel fuel, lower the ignition temperature, and increase the oxidation rate. CeO 2 has unique functions in catalytic combustion chemistry and tail gas purification due to the fact that the valence states of Ce 4+/Ce3+ can be mutually converted, and the CeO has oxygen storage/release capability and excellent stability. CeO 2 is used as a carrier to load active metals such as nickel, iron, manganese, zinc copper, cobalt, gold, silver and platinum, so that the catalytic activity of the catalyst can be further improved, the deactivation of the catalyst is slowed down, and the service life is prolonged. CN113684072A discloses an additive for improving diesel fuel combustibility and a preparation method thereof, and the additive comprises, by weight, 15-20 parts of polyethylene glycol nitrate, 8-12 parts of nitrate tetrahydrofuran, 5-10 parts of ethylene glycol nitrate, 15-20 parts of ethanolamine, 6-9 parts of long-chain fatty acid methyl ester, 1-5 parts of isooctyl nitrate, 5-10 parts of polyisobutylene succinamide, 8-12 parts of nano additive, 5-8 parts of low-temperature flowing agent, 6-12 parts of combustion auxiliary agent and 1-5 parts of metal salt. However, the nano additive prepared by the technical scheme is only CeO 2, and the activity of the catalyst is poor. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a diesel oil liquid nano additive and a preparation method thereof. The technical scheme of the invention is as follows: A liquid nano additive for diesel oil is prepared from rare-earth-base nano catalyst (0.02-0.5 wt.%), cetane improver (52-67), smoke suppressor (1-5), detergent disperser (3-19), pour point depressant (3-8), antioxidizing agent (7-20) and lubricant (5-13), The antioxidant is 2, 6-di-tert-butyl mixed phenol, The rare earth-based nano catalyst comprises a carrier and catalytic metal loaded on the carrier, wherein the carrier is porous nano CeO 2 obtained by calcining a Ce-based metal organic framework material at high temperature, the particle size of the porous nano CeO 2 is 10-1000nm, the specific surface area is 100-150m 2g-1, the total pore volume is 0.1-0.5cm 3g-1, and the loading of the catalytic metal is 1-6wt