1 liter How much is the gasoline?

0.72kg for 90 # gasoline, 0.725kg for 93 # gasoline and 0.737kg for 97 # gasoline. ..

Oil travels all over the world, but it is difficult to move without oil. As the largest liquid in the car, gasoline is closely related to every owner. While enjoying the convenience and speed brought by the car, the fast-beating numbers when refueling are also beating the fragile hearts of friends. Every day is not refueling, or on the way to refueling. The soaring oil price sucked up our friends' wallets, which made us feel sad. So, what is this gasoline that makes you happy and worries you? Today, I will tell you something about gasoline.

What exactly is gasoline?

Gasoline is a colorless to yellowish transparent liquid at room temperature, which is flammable and has a high calorific value. The main components are aliphatic hydrocarbons, cycloalkanes and a certain amount of aromatic hydrocarbons. Gasoline has a high octane number (anti-explosion combustion performance), and is divided into brands such as 90, 92, 93, 95, 97 and 98 according to the octane number. Gasoline products can be divided into aviation gasoline, automobile gasoline and solvent gasoline according to their uses.

The important characteristics of gasoline are evaporation, antiknock, stability, safety and corrosiveness.

As the fuel of gasoline engine, gasoline burns in the cylinder after being mixed with air in a certain proportion, which heats up and expands, pushes the engine piston and drives the crankshaft to rotate, thus making the engine run. In this process, the mixing of gasoline and air is very important, and the concentration, quantity and mixing uniformity of the mixture will affect the performance of the engine.

How is gasoline produced?

Gasoline is refined from petroleum. According to different manufacturing processes, gasoline components can be divided into straight-run gasoline, thermal cracking gasoline (coking gasoline), catalytic cracking gasoline, catalytic reforming gasoline, superimposed gasoline, hydrocracking gasoline, alkylated gasoline and synthetic gasoline.

The source of gasoline

The gasoline obtained by this processing is the base gasoline, which has a low octane number and cannot be used directly, so it must be blended. 92#, 95# and 98# gasoline can be blended by adding different chemical additives to the base gasoline to improve the octane number.

It can be seen that there is no difference between different brands of gasoline except octane number. Some people say that high-grade gasoline is cleaner, but it can only be? Hehe? Yes

However, the quality of 98# gasoline used by local tyrants is higher than that of 92# and 95# gasoline, and naturally the quality of 98# gasoline is better.

What's the gasoline label?

The gasoline label is the ratio of the antiknock performance of actual gasoline to that of standard gasoline. The higher the label, the stronger the explosion-proof performance.

The antiknock property of gasoline is generally expressed by octane number, so we often confuse gasoline label with octane number of gasoline, but in fact they are different:

Gasoline label is ratio and octane number is mass percentage.

For example, the commonly used 92 # gasoline has the same antiknock performance as the standard 92 # gasoline, but its octane number content is not 92%, but lower than 92%. As for why the octane number is low but it has high antiknock performance, it is because various additives are used in the blending process of gasoline, which can easily blend various brands of gasoline, and the octane number does not affect the antiknock performance.

What is the antiknock performance of gasoline?

Always say explosion-proof, then what is explosion-proof? Antiknock is the characteristic of gasoline against deflagration. Why pursue high explosion resistance?

This is about the working principle of a gasoline engine: the oil-gas mixture is sucked into the cylinder of the engine in the intake process, and then it is severely compressed in the compression process (for example, it is compressed to one tenth, and the compression ratio is 10), and then the spark plug is ignited, completely violently burning, pushing the engine piston to work, and the engine will run repeatedly.

The key point here is that the fuel-air mixture of a gasoline engine is ignited by a spark plug, and it cannot burn itself during compression (technically called deflagration). Being willful and out of step like that will bring power loss and damage the engine.

So we asked when the gasoline would ignite before burning. If you are not lit, you will never set yourself on fire because of Yalu Mountain!

Method for evaluating the antiknock performance of gasoline

There are generally two methods to evaluate the antiknock performance of fuel: motor method (RON) and research method (MON). The evaluation work is generally carried out on a specially designed single cylinder engine with variable compression ratio. The research method is the same as the motor method, but the specified test conditions are different.

The motor method has stricter requirements than the research method, so the measured octane number is lower, but it is closer to the actual road driving. When the octane number of the same fuel measured by motor method is 85, it is equivalent to the octane number of the research method of 92; Motor method 90, research method 97.

China uses the research octane number, while the United States, Japan and other countries use the car octane number, so foreign gasoline has low grade but good performance, which is the reason.

What's the difference between oil products of PetroChina and Sinopec?

Almost all the oil fields in China are in the north, such as Daqing, Liaohe and Karamay. Due to geographical reasons, refineries in the north are all refining crude oil from domestic northern oilfields, while there are few oilfields distributed in the south, and most of them are refining imported crude oil. So PetroChina has many oil fields, and Sinopec also has many refineries.

PetroChina and Sinopec

Because Sinopec's refineries mainly refine imported oil, while PetroChina mainly uses domestic oil, although everyone uses the same process, the additives are still different. Sinopec uses better additives in the world at present.

Because the quality of imported crude oil is better than that of domestic crude oil, and the additives used by Sinopec are better, Sinopec's oil products are better than PetroChina's.

In terms of oil density, the oil density of PetroChina is basically around 0.72-0.73 (kg/L/L), and that of Sinopec is basically around 0.75-0.77 (kg/L/L), which means that PetroChina can add about 30 liters more per ton of gasoline than Sinopec, which can make more money for gas station operators.

Because of the high density of oil products, the energy content of the same volume gasoline of Sinopec is higher than that of PetroChina, so the power performance of gasoline vehicles using Sinopec will be slightly better and more flame-resistant.