Current position >About Us
1. Information on the storage and transportation of light hydrocarbons in natural gas
Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, with a small amount also found in coal seams. When non fossil organic matter undergoes anaerobic decay, it produces methane rich gas, which is called biogas. The sources of biogas include swamps between forests and grasslands, landfills, sludge in sewers, and manure, which are produced by anaerobic decomposition of bacteria. Biogas also includes gastrointestinal distension (such as farts), which most commonly comes from livestock such as cows and sheep. When methane escapes into the atmosphere, it will be a greenhouse gas that directly contributes to the worsening of global warming. This scattered methane will be regarded as a pollutant rather than a useful energy source. However, once methane in the atmosphere oxidizes with ozone, it becomes carbon dioxide and water, so the greenhouse effect caused by methane emissions is relatively short-lived. And in terms of combustion, natural gas produces much less carbon dioxide than coal and other Carboniferous fuels. The important biological sources of methane are termites, ruminants (such as cows and sheep), and human cultivation of land. It is estimated that the annual emissions of these three are 1
5, 75, and 100 million tons respectively (the total annual emissions are about 100 million tons).
2. Common Abbreviations in Chemistry
Common Abbreviations in the American Chemical Abstracts (CA): A A Ampere Angstrom unit (s) Angstrom (length unit, 10-10 meters) absolute absolute absolute. EtOH absolute alcohol anhydrous ethanol absolute. Abstract: Ac acetyl (CH3CO, not CH3COO) acetyl a c alternative current AC current Ac.H.acetaldehyde acetaldehyde AcOH acetic acid Ac2O acetic anhydride AcOEt ethyl acetate AcONa sodium acetate additive additive Addition, adding alc.alcohol, alcoholic alcohol aliph.aliphatic aliphatic Al.Hg.Aluminum amalgam, aluminum amalgam, alkaline (not alkaline) Alkalinity (physiology. or alkalinity is not approved), alkalinity (am am am (not ammonia), pentyl amorph amorphis, amorphous amp ampere (s), ampere (pei), amt. amount (as a noun), quantity. analysis. anhyd.anhydrous, anhydrous AO atomic orbital orbital function app. apparatus, apparatus, approximate approximate approximate (as an adjust), approximate approximate approximate, approximate approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, approximate, metric asymmetric associative (s) associative cd associated associative cn associated at. atomic (not atom) atomic atm atmosphere (s), atmospheric Atmospheric pressure=1.01325 × 105 Pa ATP adenosine triphosphate enzyme at. wt.atomic weight atomic weight av.average (except as a vera) average B b．(follo