Sulfur Recovery Daily Question 2018.9.8
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Question: What are the physical and chemical properties of methane and ethane, the main components of gas? Answer: ① Methane: Molecular formula: CH4, molecular weight 16.04; auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃ ； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m3, specific gravity is 0.55, flash point
Composition: The main components are alkanes, with methane accounting for the vast majority; there are also small amounts of ethane, propane, and butane. In addition, it generally contains hydrogen sulfide, carbon dioxide, nitrogen, and water vapor, as well as trace amounts of inert gases such as helium and argon. Methane is a flammable and explosive gas; it is the main component of natural gas, biogas, and various liquid fuels. It serves as an important industrial raw material as well as a fuel for daily use. The lower limit for its explosion in the atmosphere is 5.3%, while the upper limit is 15%. Properties: Gas is a colorless, tasteless, and odorless gas, but sometimes an apple-like scent can be detected; this is due to aromatic hydrocarbons being released along with the gas. The relative density of gas to air is 0.554, and its density under standard conditions is 0.716 kg; therefore, it tends to accumulate in the upper parts and high areas of coal mine tunnels. The permeability of gas is 1.6 times that of air; it is insoluble in water, does not support combustion nor enable breathing. At certain concentrations, it can cause asphyxiation due to lack of oxygen, and it can also lead to combustion or explosion.
The main components are alkanes, with methane accounting for the vast majority; there are also small amounts of ethane, propane, and butane
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
(1) Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
#Here, under standard conditions, methane to butane exist in gaseous form, while those with higher molecular weights than pentane are in liquid form. In the presence of an open flame, it can catch fire and cause a \"gas\" explosion, directly threatening the lives of miners. Reply quickly#
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point
①Methane: Molecular formula: CH4, molecular weight 16.04, auto-ignition temperature: 650–750°C in air, 560–700°C in oxygen℃； Explosion range: 5–15% in air, 5.4–59.2% in oxygen ； Density is 0.717 Kg/m, specific gravity is 0.55, flash point