Why do liquefied gas, coal gas, and natural gas leaks smell bad?

It was later that hydrogen sulfide was added to this type of gas.

Or ammonia. The purpose is to make people pay attention to the leakage, because natural gas, liquefied gas and gas are tasteless or very light, especially gas, colorless, odorless, and very toxic, so a small amount of gas with a special odor will be mixed into these gases.

PS: Now most of the gas we often talk about is actually liquefied petroleum gas (low-grade alkanes), which is the most common cylinder gas, and residential areas such as residential areas use piped natural gas (methane, and real gas (carbon monoxide) is rarely used as fuel in civil use, because gas is more dangerous.

This is a safety measure that is deliberately added to allow people to detect the leak early. Liquefied gas, natural gas, and gas have no smell, and if a leak is not detected in time, it is terrifying.

If you use natural gas at home, you may smell a smell similar to bad eggs or rotten cabbage in your kitchen, and once you smell it, you will realize that there is a natural gas leak. But the main component of pure natural gas is methane, which has no odor. So why does the user smell a foul smell?

It turns out that the natural gas has been treated before entering the house, and in order to make the natural gas leak easy for people to discover, the personnel will add mercaptan with an unpleasant smell to the natural gas, so that they will notice something strange when they smell it. Scientists say that this ability allows humans to survive in dangerous environments, and that these volatile sulfides can help us not only distinguish between good and bad food, but also how much oxygen is in the atmosphere.

Why do humans have a special sense of the smell of sulfide? Neurobiologists from the University of Albany in the United States conducted a study on this topic and published the results in the American Chemical Society. In our olfactory sensory cells, there are specialized olfactory receptors that detect the gas molecules around us.

Once the olfactory receptor senses a particular gas molecule, it transmits the information to the brain, so that the sensation of the gas is formed in consciousness.

Whether it is coal gas, natural gas or liquefied gas, their own combustion gas is not smelly, and the smell of liquefied gas is the mercaptan added to the liquefied gas, mercaptan is a class of odorous and unpleasant substances, which acts as an "alarm" for liquefied gas. So that when people smell this smell, they can detect it early and take measures quickly.

This is very normal, and a lot of the specifics are colored and flavorful. Only the air in front of us feels colorless and odorless.

Gas leakage has a smell, there is a very unpleasant smell, but the general gas leakage is relatively slow and less, the nose is not sensitive or not attentive when it is not smelled, so many people will be unconsciously tricked, and regularly conduct leakage prevention inspections on **.

Gas leakage is smelly, the smell of gas is very pungent and difficult, gas leakage will be poisoned, and gas will cause disaster.

Natural gas is a colorless and odorless gas, and hydrogen sulfide gas is mixed with natural gas so that people can detect the leakage of the gas. And hydrogen sulfide gas is similar to the smell of rotten eggs, because rotten eggs, and rotten things, as well as sewers, etc., all contain hydrogen sulfide gas, and they all have the smell of rotten eggs!

There will be a gas smell.

At first, the smell is not big, but when the smell is strong, you may be poisoned by gas. So be careful not to close the home too tightly and pay attention to ventilation.

In particular, when using gas to boil water to make soup, be careful to extinguish the fire with water, as it is easy for gas to leak.

Gas leaks reach a certain concentration, which can occur if there is a fire**, so be sure to pay attention to safety!

1 Natural gas itself is colorless and odorless, but in order for people to identify, adding odorants to domestic natural gas will produce rotten eggs.

taste. As soon as there is a foul smell, immediately be vigilant, apply soapy water to the suspected air leakage, and deal with it immediately and effectively.

2. Natural gas leakage handling measures to keep calm and take the following measures: 1. Cut off**. Please turn off the burner switch, rotary valve, ball valve immediately, and do not move the appliance. 2.Turn all electrical appliances on and off, including electric and electric fans.

Exhaust fans, inhalers, air conditioners, doors, wires and wireless**, doorbells, refrigerators, etc., will produce small sparks that cause **. 3. Evacuees. Quickly disperse family and neighbors to prevent unrelated people from approaching.

4. Open doors and windows. Circulate air so that the gas can be dissipated. 5. Power alarm.

3. Popularize the basic knowledge of natural gas, after gas leakage, it will be filled with air, suffocation or poisoning, so try not to leave people indoors. If you find a fire, cover it with a damp cloth or use a fire extinguisher.

In addition, when installing or repairing gas pipelines, on-site services from experts from the formal sector should be requested. Do not secretly install, extend, or disassemble plumbing valves and pipes. It is necessary to develop the habit of using the gas stove according to the operating procedures of the manual, and turning off the main valve when not in use.

When going out for a long time, it is necessary to thoroughly check whether the switch and main valve of the gas stove are closed. Do not put flammable and explosive substances around the gas stove, and do not put heavy objects on the gas pipe. The stove, pipes and connected hoses can be checked frequently for air leaks.

When soapy water is applied to the cooktop, or a connection to a pipe, hose, or cooktop, the gas is leaking when the foam protrudes. Be careful not to hang wet objects such as rags and wipes on the gas pipes. If these wet things are left to dry for a long time, the pipes are prone to rust and may break.

Wet rags with salt or acidic substances can corrode iron pipes and shorten their life. Friends who use natural gas at home can smell bad eggs or rotten cabbage in their kitchens, and when they smell this smell, they will realize that there is a gas leak. But the main component of pure natural gas is methane.

Methane has no taste. So why do users smell a foul odor? Originally, the natural gas was processed before moving in, and in order to make it easy to find the natural gas leakage, the company added mercaptan with an unpleasant smell to the natural gas.

It smells strange. For the human olfactory experience, scientists.

said that this ability allows humans to survive in a dangerous environment. These are volatile.

Sulfide not only helps us judge the quality of food, but also the amount of oxygen in the atmosphere.

In Gas**, in order to ensure that users can use natural gas more safely, the gas company adds some odorous gases to the natural gas, so that users can be aware of the problem that the natural gas has leaked.

Natural gas is colorless and odorless, but in civilian natural gas, in order to use it safely, an odorant with the smell of rotten eggs is added, and the effect is to prevent natural gas poisoning.

Natural gas is treated before entering the house, and in order to make natural gas leakage easy for people to find, ** personnel will add mercaptan with an unpleasant smell to the natural gas, so that they will notice something strange when they smell it.

Gas leaks smell good. As long as there is no possibility of the pipe being squeezed or cut in a dark place, there should be no problem.

Natural gas can suffocate people when it reaches a certain level in the air. Natural gas is not as toxic as carbon monoxide, and it is inherently harmless to humans. However, if natural gas is in a state of high concentration and the oxygen in the air is not enough to sustain life, it can still cause death, after all, natural gas cannot be used for human breathing.

As a fuel, natural gas can also be caused by the occurrence of **.

Although natural gas is lighter than air and easily dispersed, when natural gas accumulates in an enclosed environment such as a house or tent, it reaches a certain proportion, triggering a powerful **. ** It is possible to raze an entire house or even affect neighboring buildings. Methane in air has a lower limit of 5% and an upper limit of 15%.

Due to the volatile nature of gas, the compressed natural gas to be used in the engine of natural gas vehicles is basically not available under spontaneous conditions, so it is necessary to use external force to maintain the concentration of natural gas between 5% and 15% to trigger **.

Natural gas is widely distributed in nature, with a wide range of genetic types, different degrees of thermal evolution, and various geochemical characteristics, so it is difficult to identify them with unified indicators. Practice has shown that it is more reliable to use multiple indicators to make comprehensive judgments than to use a single index.

In terms of the items involved in the identification of natural gas genesis, there are mainly four items, such as isotopes, gas components, light hydrocarbons and biomarker compounds, some of which have distinct criteria and absolute significance, while some contents overlap in the three types of genetic gases and only have certain relative significance.

Natural gas is colorless and basically odorless, but in order to facilitate the people to judge whether it is leaking, some substances are generally added to civil natural gas, so that it emits a pungent smell similar to paint, and people will feel nauseous and dizzy when they smell too much. Natural gas leakage is mostly caused by improper use, decoration, disassembly and installation of gas stoves, damage to pipeline interfaces, and relaxation of plastic hose interfaces of gas stoves.

If you find a natural gas leak, keep a cool head and take the right way to solve it to avoid accidents. First of all, the main valve of natural gas should be closed immediately to block the gas source; And quickly open the doors and windows for ventilation, and remember to move gently, so as not to be caused by sparks caused by the violent impact of metal**. Don't panic in a hurry, if you accidentally collide with a metal object indoors, it may also cause sparks**.

Secondly, do not turn on or off any electrical equipment such as lights, TVs, computers, water heaters, range hoods, etc. You should quickly call the natural gas repair **96777, and stay away from the leaky room when dialing, otherwise it is easy to produce sparks, and you can not use open flames, such as lighters, candles, etc.

Natural gas leaks into the air, which can suffocate or even poison people, so try not to leave people indoors. If found**, cover the fire with a damp cloth or use a fire extinguisher.

In addition, when installing or repairing natural gas pipelines, professionals from regular units should be invited to provide door-to-door service. Do not install, extend, or dismantle valves and pipes without permission. Use the gas stove according to the operating procedures of the manual, and when not in use, develop the habit of closing the main valve easily.

When going out for a long time, be sure to thoroughly check whether the switch and main valve of the gas stove are closed.

Do not put flammable and explosive materials around the gas stove, and do not press heavy objects on the gas pipeline. Always check the stove, pipes, and connected hoses for air leaks. Wipe soapy water on the air outlet of the stove, or the connection between the pipe, hose and the stove, if there are bubbles coming out, it means that there is gas leaking.

Care should be taken not to hang wet items such as rags and wet towels on natural gas pipelines. If these wet materials are left for a long time, the pipes are easy to rust and will break. Wet rags with salt or acids can also corrode iron pipes and shorten their life.

Natural gas itself is a colorless and odorless gas, and hydrogen sulfide gas is mixed with natural gas in order to make people aware of the gas leakage. And hydrogen sulfide gas approximates the smell of rotten eggs!

Yes, the natural gas in the homes of the people will be smelly, and it is easy to smell if it leaks.

As long as there is no possibility of the pipeline being squeezed or cut in the dark, there should be no problem, and the pressure of natural gas entering the house is relatively low.

Generally, it is best not to replace these pipes casually, and if they do, it is best to let someone from the natural gas company take a look, because these pipes and some things still have standardized spacing, such as wires and sockets.

Natural gas is a multi-component gas mixture, the main component is alkanes, of which methane accounts for the vast majority, and a small amount of ethane, propane and butane, in addition to generally containing hydrogen sulfide, carbon dioxide, nitrogen and water vapor, as well as trace amounts of inert gases, such as helium and argon. After purification, the natural gas has a peculiar smell and a small amount of deodorant. It can be clearly discerned.

The chemical composition and physicochemical properties of natural gas vary from place to place, the main component is methane, but also contains small amounts of ethane, butane, pentane, carbon dioxide, carbon monoxide, hydrogen sulfide, etc. When hydrogen sulfide is free, it is a colorless, odorless, flammable and explosive gas, with a density and lighter than air. Dry gas with more than 90% methane content and moisture gas with less than 90% methane content are usually referred to as dry gas.

Leaks are dangerous and generally not poisonous.

Natural gas leakage has a smell, not the smell of natural gas itself, but in order to detect the leak in time, natural gas is added with flavored additives. The hose can be replaced by yourself, I don't understand what you mean by the hose walking on the ground, generally only in front of the stove and in front of the gas water heater will install a section of soft, you just need to ensure that you use a qualified hose, the two joints are tightly connected, pay attention to stay away from the heat source. After replacing the hose and opening the valve, you can brush some washing water at the joint, and there will be no air leakage if it does not bubble.

Natural gas itself has no odor, and due to the fear of leakage in life, natural gas is odorized before general civilian gas supply. Makes natural gas smell. This makes it easier to detect leaks.