Pentane is difficult to reform dehydrogenation, making it more difficult to use. At present, many of the carbon five light components in oil and gas fields, oil refineries, and ethylene plants are vented and burned. The petrochemical plant's treatment of carbon five components is mostly used as solvent oils, cleaning agent absorbents, and the refining of cyclopentadiene, etc. Some even use it as a gasoline additive, which will affect the quality of gasoline.
Since the 1980s, China has encouraged the deep processing and utilization of petroleum carbon-to-carbon nine components. Since the early 1990s, it has begun the technical research work on the use of carbon five light components liquefaction as fuel gas. At present, the mixed-carbon five light component gas technology has matured. The mixture of carbon light components with a boiling point below 40°C and air has been mixed with air. It has already met the “city gas design code†in which the gas heat value must exceed the explosion limit. 2 times the upper limit of the rigid index, and the mixed gas is basically non-toxic, can be long-distance normal pressure or low pressure stable transport, especially suitable for the use of small town pipeline gas in the area south of the Great Wall of China. For the towns of 10,000 to 30,000 households, the mixed carbon five light component pipeline gas is almost the best choice in terms of safety, economy, environmental protection, and the stability, comfort, and convenience of the use process. Currently, in some parts of the city, the gas has been successfully applied.
From the viewpoint of resource supply, carbon dioxide can be used for fine chemicals. The diolefin component and part of the monoolefin components account for about 20% of the resource. It can be used for urban fuels. The alkane component accounts for about 70% of the resource. The rest can be used. Used as an organic solvent. Since 55% of the cracked carbon 5, 70% of the refinery carbon 5, and more than 95% of the natural carbon 5 can be made into mixed gas, if all the carbon 5 light components are gasified, the carbon 5 gas available to China in 2020 will be obtained. The volume will be equivalent to 20 billion cubic meters of natural gas, which exceeds the actual supply of 15 billion cubic meters per year of China's West-East Gas Pipeline Project. Based on this calculation, the living and commercial gas demand of 60 million urban residents (about 200 million people) will be met.
In addition, after the carbon 5 light component has a clear outlet, it can no longer be used to catalytically reform gasoline, but also effectively improve the quality of oil products and reduce vehicle exhaust pollution. On the other hand, if all the 14 million tons of refined carbon-made mixed-channel gas is used, it can offset 26 million to 36 million tons of standard coal annually, reducing the annual carbon dioxide emission from 18.56 to 42.16 million tons, and reducing sulfur dioxide and nitrogen. Oxide, dust emissions 1.3 million tons. From the perspective of conservation and alternative oil, it can save 20 million tons of crude oil annually.
From this we can see that accelerating the use of carbon 5 light components for the industrialization of urban pipeline gas is a safe, economic, and environmentally friendly move.
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