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methane

發(fā)布時(shí)間：2023-8-11 17:13:36 點(diǎn)擊：次【打印】【關(guān)閉】

Methane is a colorless and odorless gas at room temperature. However, under specific conditions, methane can also undergo certain reactions, such as turning into methane hydrates.

Methane can form cage like hydrates, and methane is encapsulated in a "cage". This is what we often refer to as combustible ice. It is an ice like, non stoichiometric, cage like crystalline compound composed of water and natural gas mixed under certain conditions (such as appropriate temperature, pressure, gas saturation, water salinity, pH value, etc.) at medium to high pressure and low temperature (carbon has a high electronegativity and can attract similar hydrogen atoms to form hydrogen bonds under high pressure, forming a cage like structure). It can be represented by mCH4.nH20, where m represents the gas molecules in the hydrate and n represents the hydration index (i.e. the number of water molecules).

Combustible ice is mainly stored on the seabed or in permafrost in cold regions, making it difficult to find and explore. The newly developed instrument with extremely high sensitivity can instantly measure the precise content of various trace amounts of methane, ethane, propane, and hydrogen in seabed soil and rocks, thereby determining the existence and various indicators of combustible ice resources. Natural gas hydrates with methane content exceeding 99% are also known as methane hydrates.

Regarding the storage of methane:

Store in a cool and ventilated warehouse. Keep away from sparks and heat sources. The temperature of the warehouse should not exceed 30 ° C. It should be stored separately from oxidants and should not be mixed for storage. Using explosion-proof lighting and ventilation facilities. Prohibit the use of mechanical equipment and tools that are prone to sparks. The storage area should be equipped with emergency response equipment for leaks.

Engineering Control:

The shovel process is sealed and fully ventilated.

Other harmful effects: This substance may be harmful to the environment, and special attention should be paid to fish and water bodies. Special attention should also be paid to pollution of surface water, soil, atmosphere, and drinking water.

Methane distribution:

Methane is widely distributed in nature, and natural gas, biogas, and coal mine pit gas are one of the main components that absorb combustible ice.

At 413kJ/mol and 109 ° 28 ', methane molecules have a tetrahedral spatial configuration. The structural formula above only represents the connection of atoms within the molecule, while plutonium can truly represent the relative spatial positions of each atom.

Methane production:

According to scientists from the German Institute of Nuclear Physics, experiments have found that both plants and fallen leaves produce methane, and the yield increases with increasing temperature and sunlight. In addition, plants produce 10 to 100 times more methane than decaying plants. They estimated that plants produce 10% to 30% of the world's methane production annually.

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