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Product uses

Nitric acid is an excellent diesel cetane number improver, which can significantly increase

the cetane number of diesel, change ignition performance, reduce diesel vehicle exhaust

emissions, increase power performance, save fuel, and extend diesel storage life. It is an

effective way for refineries to improve diesel cetane number and quality.

Product Specification

Product package

190 kg/barrel or according to customer requirements.

1.Chemical production
Isooctyl nitrate/nitric acid is widely used in chemical production as an intermediate

for various esters. This includes plastics, paint, pigments, coatings, rubber, and cosmetics.

In addition, it can also be used as a solvent for organic chemicals. Due to its low toxicity

and volatility, isooctyl nitrate is a safe and reliable chemical.

The addition effect of the cetane number improver is related to the structure and number

of the free radicals generated by the decomposition of the cetane number improver.

Therefore, both the carbon chain and the types of substituents of the cetane number

improver will affect the degree of cetane number improvement.

Generally speaking, the longer the main chain of the generated free radicals and the fewer

the branched chains and substituents, the better the improvement effect on the cetane

number. For free radicals with the same main chain but different substituents, the more

the Gibbs free energy decreases during the addition reaction with O₂, the better the

improvement effect of the improver on the cetane number of diesel.

3.Types and Properties of Cetane Number Improvers There are a wide variety of structural

types of cetane number improvers. The main types of cetane number improvers Nitric Acid

include nitrate compounds, organic peroxides,organic sulfur compounds, dinitro compounds,

ethers, fatty acid derivatives, etc.

Since the thermal decomposition of polynitrates can produce more free radicals, it can

better improve combustion efficiency. The same dose of polynitrate can increase the

cetane number by 2 - 5 units more than mononitrate. However, the stability of polynitrates

is very poor. For example, glycerol trinitrate and ethylene glycol dinitrate are very sensitive
to heat and impact.

However, some polymeric polynitrates, such as polyethylene glycol nitrate

O₂NO(CH₂CHO)ₙNO₂, when used together with stabilizers, can not only improve

the cetane number well, but also can be transported and stored safely. There are also

many types of heterocyclic compound nitrates. The heterocyclic compounds among them

include tetrahydrofuran, tetrahydro - pyran, piperidine, morpholine, etc.

The addition effect of this kind of nitrate is also very good. For example, the addition

effect of 3 - nitro - tetrahydrofuran nitrate is better than that of isooctyl nitrate, and the

CN increment of diesel is basically in a linear relationship with the addition amount.

The addition effect of nitro - containing nitrates is also very good, but their stability is

poor.

Organic Peroxides Due to the fact that they are slightly more expensive than nitrate

esters, are explosive in nature, and have high production and transportation costs, they
have not been widely used. However, organic peroxides do not contain the nitrogen (N)
element and can reduce NOₓ emissions.

These compounds contain a relatively large amount of oxygen, have a low decomposition

activation energy, and can better enhance the oxidation reaction of the fuel itself. They

include alkyl peroxides, cycloalkyl peroxides,diperoxides, peroxy esters, Nitric Acid,etc.

They have a good effect even with a low addition amount.The most commonly used

one is di - tert - butyl peroxide, and its cetane - number -improving effect is close to

that of 2 - ethylhexyl nitrate. However, di - tert - butyl peroxide has a low flash point

and is volatile, which can lead to various hazards. In recent years,a new peroxide

has been discovered through research, and its addition effect is comparable to that

of di - tert - butyl peroxide.

Organic Sulfur Compounds Among the organic sulfur compounds that have been studied,

only disulfide compounds and polysulfide compounds have an effect on increasing the cetane

number of diesel, while other sulfur compounds have no improving effect on the cetane number

of diesel. However,the sulfur content in fuel is strictly limited.