Automobiles using waste heat from automobile exhaust to reform ethanol water vapor to produce hydrogen fuel

Abstract

Provided is an automobile capable of producing hydrogen fuel by reforming ethyl alcohol water vapor through automobile exhaust waste heat. An automobile engine gas inlet is connected with a hydrogen storage cylinder through a hydrogen supply pipe. An automobile catalytic converter on an engine exhaust pipe is connected with a device for producing hydrogen by reforming the ethyl alcohol water vapor through the exhaust waste heat. The device is composed of an ethanol water vaporization box and an ethyl alcohol water vapor reformed hydrogen box which communicate with each other. An exhaust passing pipe is arranged in the reformed hydrogen box of the device, and the reformed hydrogen box is filled with a catalyst. The exhaust passing pipe is connected with the automobile catalytic converter and the vaporization box. The vaporization box is connected with a silencer. An ethanol water vaporization pipe is arranged in the vaporization box. An inlet of the vaporization pipe is connected with a liquid electric metering pump in an ethanol water box through an ethanol water conveying pipe. An outlet of the vaporization pipe is connected with an ethyl alcohol water vapor inlet of the reformed hydrogen box through a vapor pipe. A hydrogen outlet of the reformed hydrogen box communicates with a hydrogen conveying pipe through a dehumidification and cooling device, and the hydrogen conveying pipe is connected with the hydrogen storage cylinder.

Description

technical field [0001] The invention relates to the field of new energy automobiles, in particular to an automobile that utilizes waste heat of automobile tail gas to reform ethanol water vapor to produce hydrogen fuel. Background technique [0002] As a renewable energy source, bioenergy is favored by human beings. At present, bioenergy represented by bioethanol has been used in a certain range. Take Duandian, which has a relatively good development of bio-energy, as an example. Most of the bio-ethanol is extracted from corn. This scheme of extracting bio-ethanol from corn has brought a new crisis to human beings—the food crisis, and the consumption of this scheme to extract ethanol energy, accounting for more than 3 / 4 of the energy released by ethanol combustion, thus determining that this scheme is doomed to be unsustainable. [0003] At present, after 7 years of hard work, China Petrochemical Corporation has successfully overcome the production technology of plant fiber...

AI Technical Summary

Problems solved by technology

Except for a small part of bioethanol used in automobiles, the others can only be purified by distillation for industrial and medical use, so its development is limited

2. Although the cost of large-scale production of crude ethanol is very low, the cost of purifying to 99.5% anhydrous ethanol is very high. If high-cost anhydrous ethanol is used as fuel, it is obviously not accepted by the market

[0010] 1. The calorific value of ethanol is 64.57% of conventional gasoline. According to relevant reports, if the car uses ethanol gasoline containing 10% ethanol without any modification, the fuel consumption of the engine will increase by 5%.

[0011] 2. The latent heat of vaporization of ethanol is large, and the evaporation temperature under the theoretical air-fuel ratio is higher than that of conventional gasoline

Ethanol gasoline affects the formation and combustion speed of the mixed gas, resulting in the decline of the car's power, economy, and cold start performance, which is not conducive to the acceleration of the car

[0012] 3. Ethanol will produce acetic acid during combustion, which has a corrosive effect on automotive metals, especially copper

[0014] 5. Ethanol is very soluble in water. When the water content of ethanol gasoline for vehicles exceeds the standard index, liquid phase separation is prone to occur

[0029] 3. There are currently no major problems in hydrogen fuel cell technology. What restricts its development are gas filling stations, hydrogen carrying, and manufacturing costs. However, its energy-saving and environmental protection advantages have not been regretted by any technology so far, and may become the future The ultimate goal of the car

Although this technical route has a huge technological breakthrough, it is not difficult to find that only 15% of the wasted energy is recycled.

One of the problems is: using the working medium as a medium, through the temperature difference of the working medium (the heated working medium needs to be cooled, and most of the cooled energy is wasted, and the temperature of the working medium can no longer be raised to generate high pressure. ) to generate a pressure difference, and then do work through the expansion unit and the turbine steam engine, so its thermal efficiency can only be increased by 15%. Compared with nearly 70% of wasted energy, the utilization rate is low, which is the highest thermal efficiency of the steam engine; the second problem is: The expansion unit and the turbo steam engine are at the current level of manufacturing technology, and their volume is too large to be arranged on a small car; the third problem is that the whole set is complicated and the manufacturing cost is high, so it is not easy to be accepted

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