A catalyst for exhaust gas of a methanol/diesel co-located combustion system and its application method

A combustion system and catalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve problems such as nozzle blockage, extend service life, alleviate nozzles Blocking, extended service life effect

Active Publication Date: 2021-06-25
ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of complex physical and chemical reactions in the SCR system, including atomization, fragmentation, evaporation of urea solution, energy and momentum exchange between droplets and exhaust gas, particle collision process, liquid film formation, NO x The catalytic reduction reaction of urea, etc., and the atomization field and temperature field formed after urea injection change with the change of engine operating conditions. When urea droplets decompose into ammonia, they also generate cyanic acid, biuret, three Intermediate products such as polycyanic acid, easy to form deposits such as urea crystal stones
Deposits build up and can cause nozzle clogging

Method used

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  • A catalyst for exhaust gas of a methanol/diesel co-located combustion system and its application method

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specific Embodiment approach 1

[0023] A kind of tail gas catalyst for methanol / diesel co-placement combustion system, the parts by weight of sodium fatty acid methyl ester sulfonate in the tail gas catalyst for methanol / diesel co-placement combustion system is 2 parts, the parts by weight of cerium oxide The number is 40 parts, the parts by weight of neodymium fluoride is 35 parts, the parts by weight of triethanolamine is 4 parts, the parts by weight of polyisobutylene succinimide is 12 parts, and the parts by weight of diisopropyl dithiophosphoric acid The parts by weight of oxymolybdenum is 7 parts.

[0024] In the exhaust gas catalyst for methanol / diesel co-located combustion system described in this embodiment, the particle size of the cerium oxide is 50-100 nm, and the particle size of the neodymium fluoride is 50-100 nm.

[0025] The tail gas catalyst for the methanol / diesel co-located combustion system described in this embodiment is added to the vehicle urea, and the described one is used for The ...

specific Embodiment approach 2

[0032] A kind of tail gas catalyst for methanol / diesel co-placement combustion system, the parts by weight of sodium fatty acid methyl ester sulfonate in the tail gas catalyst for methanol / diesel co-placement combustion system is 16 parts, the parts by weight of cerium oxide The number is 32.4 parts, the parts by weight of neodymium fluoride is 33.6 parts, the parts by weight of triethanolamine is 3.5 parts, the parts by weight of polyisobutylene succinimide is 8.5 parts, diisopropyl dithiophosphoric acid vulcanization The parts by weight of oxymolybdenum is 6 parts.

[0033] In the exhaust gas catalyst for methanol / diesel co-located combustion system described in this embodiment, the particle size of the cerium oxide is 50-100 nm, and the particle size of the neodymium fluoride is 50-100 nm.

[0034] The tail gas catalyst for the methanol / diesel co-located combustion system described in this embodiment is added to the vehicle urea, and the described one is used for The mass ...

specific Embodiment approach 3

[0038] A kind of tail gas catalyst for methanol / diesel co-placement combustion system, the parts by weight of sodium fatty acid methyl ester sulfonate in the tail gas catalyst for methanol / diesel co-placement combustion system is 27 parts, the parts by weight of cerium oxide The number is 30 parts, the parts by weight of neodymium fluoride is 30 parts, the parts by weight of triethanolamine is 2 parts, the parts by weight of polyisobutylene succinimide is 7.5 parts, diisopropyl dithiophosphoric acid vulcanization The parts by weight of oxymolybdenum is 3.5 parts.

[0039] In the exhaust gas catalyst for methanol / diesel co-located combustion system described in this embodiment, the particle size of the cerium oxide is 50-100 nm, and the particle size of the neodymium fluoride is 50-100 nm.

[0040] The tail gas catalyst for the methanol / diesel co-located combustion system described in this embodiment is added to the vehicle urea, and the described one is used for The mass rati...

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Abstract

The invention relates to an exhaust gas catalyst used in a methanol / diesel co-located combustion system and a method for using the same, which belongs to the field of vehicle exhaust catalysts. The present invention solves the problem for dealing with combustion system tail gas. The present invention is mainly made of sodium fatty acid methyl ester sulfonate, cerium oxide, neodymium fluoride, triethanolamine, polyisobutylene succinimide, diisopropyl dithiophosphoric acid molybdenum sulfide, and the parts by weight are respectively 2-27 parts of sodium fatty acid methyl ester sulfonate, 30-40 parts of cerium oxide, 30-35 parts of neodymium fluoride, 2-4 parts of triethanolamine, 7.5-12 parts of polyisobutylene succinimide, 3.5-7 parts of diisopropyl dithiophosphoric acid oxymolybdenum sulfide, the mass ratio of a catalyst for exhaust gas in a methanol / diesel co-located combustion system to the vehicle urea is 0.05-0.2:1, mixed After uniformity, the obtained mixed solution is added to the urea metering injection device. The invention can effectively absorb harmful gas.

Description

technical field [0001] The invention belongs to the field of vehicle exhaust catalysts; in particular, it relates to an exhaust catalyst used in a methanol / diesel co-combustion system and a use method thereof. Background technique [0002] Methanol / diesel co-combustion technology is to inject methanol into the vehicle intake port and inject diesel into the cylinder to realize the combined combustion of the two fuels. When the engine is started and the car is warmed up, the pure diesel mode is used, and when the water temperature reaches the specified level, it is converted to diesel and methanol dual fuel operation. Utilizing the characteristics of large latent heat of vaporization of methanol, low cetane number, and high autoignition temperature, the combustion of diesel oil is optimized and adjusted to achieve efficient and clean combustion, thereby achieving the goal of saving diesel oil and enhancing power performance. However, due to the high latent heat of vaporizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26F01N3/20
CPCB01J31/26F01N3/20Y02A50/20
Inventor 唐诗洋张晓昕赵娴张树华杨光
Owner ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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