Hydrogen production efficiency is typically 55%. According to the request for relevant public information, the general formula for calculating the efficiency of water electrolysis hydrogen production is 1 cubic meter of hydrogen, the mass is 89.9g, the heat is from 14.3 · 65 h (time). Hydrogen production by water electrolysis is a relatively practical method of producing hydrogen.
Method of producing hydrogen by electrolysis of water
The problem is that the energy conversion is not spontaneous and requires the loss of external energy. The electrolysis of water produces hydrogen and oxygen. Where does electricity come from? Judging from the current technical level, it is not worth electrolyzing water to obtain hydrogen energy. Water supply efficiency for producing hydrogen is typically 75-85%. This and the difficulty of hydrogen storage materials are lThese are the reasons why hydrogen energy is not currently used in large quantities.
In addition, most of the energy generated by combustion will be dissipated as heat. Currently, the best internal combustion engines can only achieve less than 55% efficiency, usually only 30-40%. The efficiency of water electrolysis to obtain hydrogen energy for combustion will not reach 50%. However, the efficiency of hydrogen-based electricity generation can reach 50-70%. So, are you going to use the hydrogen you worked so hard to obtain through electrolysis to produce electricity?
However, hydrogen does indeed constitute an attractive new energy source.
Haha, don’t you understand? Please note that I mentioned hydrogen storage to illustrate that hydrogen is not widely used. Your response is not an attempt to avoid the'important but avoid the weak. . . . Please express your opinion on the essence of the problem "energy use". The above figures are purely ideal and theoretical. In fact, it would be a miracle if your solution could achieve 10% overall electrical energy efficiency. However, if electrical power is used to directly drive a car, the efficiency is likely to be higher. 70% to 80%.
Please also pay attention to the question of where the electrical energy comes from. Electrical energy is not a primary energy source. Do you use nuclear power, solar power, hydropower, tidal or coal? Which one does not have such defects?
Method for producing hydrogen by electrolysis of water: direct current passes through an electrolytic tank filled with potassium hydroxide or sodium hydroxide, and the water molecules undergo an electrochemical reaction on the elementsectrodes and decomposes into hydrogen and oxygen.
Water electrolysis is a chemical experiment that uses water decomposition and synthesis experiments to understand that water is composed of hydrogen and oxygen. The principle is that water can be broken down into hydrogen and oxygen under the action of a direct current. When an electric spark passes through a mixture of hydrogen and oxygen, they combine to form water. The two experiments show that water is made up of two elements, hydrogen and oxygen. From the experimental results, we can also know that their volume ratio is 2:1.
Extension: The water electrolysis hydrogen production device includes Hoffman electrolyzer, power supply DC (or lead-acid battery), wires, test tubes, alcohol lamps, gas pipes, induction coils, electric wrenches, iron brackets, iron. pliers, tipgas storage racks, glass sinks, etc. Electrolysis of water to produce 1 kilogram of hydrogen consumes approximately 56 kilowatt hours of electricity. The cost of producing hydrogen by hydrolysis therefore depends on the price of electricity. The calorific value of 2.1 kilograms of hydrogen is approximately equivalent to 33 kWh (degrees), the electricity generation efficiency of hydrogen fuel cells is generally between 40% and 60%.
“The electrolysis of water to produce hydrogen requires a large amount of electricity. Currently, each kilogram of hydrogen produced by electrolysis of water to produce hydrogen consumes 56 kilowatt hours of electricity. must continue to reduce costs. "In Li Yizhong It seems that the key to transforming "gray hydrogen" into "blue hydrogen" is the capture, storage and utilization of carbon dioxide, and we should intensify the research, development and 'industrialization.