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A kind of cerium-based nanomaterial and its application

A nano-material, cerium-based technology is applied in the field of cerium-based diesel additives to achieve the effects of increasing stability, reducing particulate emissions and improving stability

Active Publication Date: 2021-04-13
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects in the prior art and provide a cerium-based nanomaterial with concentrated particle size distribution, less agglomeration phenomenon, stable storage, and suitable for diesel oil additives

Method used

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  • A kind of cerium-based nanomaterial and its application
  • A kind of cerium-based nanomaterial and its application
  • A kind of cerium-based nanomaterial and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The preparation process of the cerium-based nanomaterial of the present invention is as follows:

[0035] Precipitation step: pump 0.15mol / L cerium acetate aqueous solution and 0.2mol / L ammonia water into section I of the microchannel reactor at a constant flow rate of 18ml / min and 49ml / min respectively to carry out precipitation reaction. The travel time of the mixed solution in stage I is 7.2s, the reaction temperature is 15°C, and the pH value of the system after the reaction is 8.

[0036] Oxidation step: pump 10wt% hydrogen peroxide solution into section II of the microchannel reactor at a flow rate of 0.5ml / min. The travel time of the total mixed solution in section II after pumping in hydrogen peroxide is 7.1s, and the temperature in section II is controlled to be 30°C.

[0037] Dispersion step: pump 1 mol / L acetic acid aqueous solution into section III of the microchannel reactor at a flow rate of 1.7 ml / min. The travel time of the total mixed solution after p...

Embodiment 2

[0046] The preparation process of the cerium-based nanomaterial of the present invention is as follows:

[0047] Precipitation step: 0.4mol / L cerium nitrate aqueous solution and 0.1mol / L ammonia water are respectively pumped into section I of the microchannel reactor at a constant flow rate of 3ml / min and 48ml / min to carry out precipitation reaction. The travel time of the mixed solution in stage I is 28.2s, the reaction temperature is 0°C, and the pH value of the system after the reaction is 10.

[0048] Oxidation step: pump 0.5 mol / L sodium hypochlorite aqueous solution into section II of the microchannel reactor at a flow rate of 1.2 ml / min. The travel time of the total mixed solution after pumping sodium hypochlorite in section II is 9.2s, and the temperature in section II is controlled to be 15°C.

[0049] Dispersion step: pump 0.2 mol / L ethanolamine aqueous solution into section III of the microchannel reactor at a flow rate of 2.7 ml / min. The travel time of the total ...

Embodiment 3

[0058] The preparation process of the cerium-based nanomaterial of the present invention is as follows:

[0059] Precipitation step: 0.7mol / L cerium nitrate aqueous solution and 0.7mol / L ammonia water are respectively pumped into section I of the microchannel reactor at a constant flow rate of 10ml / min and 34.5ml / min to carry out precipitation reaction. The travel time of the mixed solution in stage I is 10.8s, the reaction temperature is 45°C, and the pH value of the system after the reaction is 7.

[0060] Oxidation step: pump 10wt% hydrogen peroxide solution into section II of the microchannel reactor at a flow rate of 1.2ml / min. The stroke time of the total mixed solution in section II after pumping in hydrogen peroxide is 10.5s, and the temperature in section II is controlled to be 45°C.

[0061] Dispersion step: pump 10 wt% sodium dodecylbenzenesulfonate aqueous solution into section III of the microchannel reactor at a flow rate of 2.2 ml / min. After pumping the disper...

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Abstract

The invention discloses a cerium-based nanometer material and its application. The cerium-based nanomaterial is an oil phase solution, wherein the solvent is a long-chain aliphatic hydrocarbon solvent D60 or D80, and the solute is a cerium hydroxide nanomaterial whose surface is modified with a long-chain organic acid; the long-chain organic acid is a C8-C18 saturated fatty acid ; The average particle diameter of the cerium hydroxide nanomaterial in the oil phase solution is 14-33nm, and the particle diameter span between the maximum particle diameter and the minimum particle diameter is 7-15nm. The present invention modifies the cerium hydroxide nanomaterial by long-chain organic acid to improve its stability in the oil phase solution; at the same time, it controls the particle size distribution of the nanomaterial in the cerium-based nanomaterial so that the particle size distribution is uniform and concentrated, Avoid agglomeration and further increase its storage stability.

Description

technical field [0001] The invention belongs to the field of fuel oil additives, in particular to a cerium-based diesel oil additive with concentrated particle size distribution prepared by a microchannel reactor. Background technique [0002] Due to the oxygen-enriched and non-uniform combustion characteristics of diesel engine in the combustion chamber, the pollutants in the exhaust gas are mainly nitrogen oxides and PM particles. The addition of various common diesel additives on the market, including pour point depressants, stabilizers, emulsifiers, detergents, and cetane number improvers, can improve fuel quality, promote combustion, and improve fuel economy, but it is harmful to exhaust pollution The actual impact on pollutant emissions is relatively small. Nano cerium oxide (CeO 2 The valence state of cerium in ) is variable, has good oxygen storage / oxygen release capacity, and can catalyze the combustion of soot to reduce the reaction temperature. Cerium-based die...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/00C10L1/188C10L1/12C10L10/00B01J19/00B01J31/26C01F17/235C01F17/10B82Y40/00B82Y30/00
CPCB01J19/0093B01J31/26B82Y30/00B82Y40/00C10L1/1233C10L1/1881C10L10/00C01F17/206
Inventor 高强徐翠香潘勇刘高荣吴此俊
Owner NANJING POLYTECHNIC INSITUTE