"Grey hydrogen", "blue hydrogen" and "green hydrogen", so there are so many colors of hydrogen?
Release Date: 2022-01-08 16:42:15 Visit: 331
In December 2015, the Paris Climate Agreement was officially signed, and the core goal is to control the global temperature rise within 2 degrees Celsius, far below the pre-industrial revolution level, and strive to control it within 1.5 degrees Celsius.
According to relevant statistics, 73% of global greenhouse gas emissions come from energy consumption. In order to achieve the goals of the Paris Climate Agreement, the global energy system must undergo a profound transformation, from a largely fossil fuel-based energy system to an efficient, renewable, low-carbon energy system.
Why is hydrogen energy favored?
Hydrogen is the most abundant element in the universe, and hydrogen energy is the energy released by the hydrogen element in the process of physical and chemical changes.
As an energy source, hydrogen energy has very competitive advantages:
1. Eco-friendly
Unlike traditional fossil fuels, hydrogen and oxygen can be burned to generate heat or converted into electricity by fuel cells. In the process of converting hydrogen into electricity and heat, only water is produced, and no greenhouse gases or fine dust are produced.
2. Use efficient
Hydrogen not only has a wide range of sources, but also has the advantages of good thermal conductivity, clean and non-toxic, and high heat per unit mass. Under the same mass, hydrogen contains about three times the heat of gasoline, and it is an important raw material for petrochemical industry and aerospace rocket power fuel.
3. Flexible and convenient storage and transportation
Unlike fossil fuels, hydrogen energy is secondary energy and can be produced by breaking down natural gas, oil, coal and water. In addition to the gaseous state, hydrogen can also appear as a liquid or solid hydride. When liquefied at -263 °C, the volume of hydrogen will be reduced to 1/800 of the original, and after being compressed in a high-pressure tank, it is convenient for storage and transportation.
What is the difference between the different colors of hydrogen?
Although hydrogen energy is a clean and renewable energy source, there is no carbon emission in the process of releasing energy, but the current process of producing hydrogen energy is not 100% "zero carbon".
Hydrogen is mainly present in water and fossil fuels in the form of compounds on the earth, and hydrogen energy, as a secondary energy source, needs to be "extracted" through hydrogen production technology. At present, most of the existing hydrogen production technologies rely on fossil energy and cannot avoid carbon emissions. According to the source of hydrogen energy production and the emissions in the production process, people name hydrogen energy as gray hydrogen, blue hydrogen, and green hydrogen.
grey hydrogen
Grey hydrogen is hydrogen produced by the combustion of fossil fuels (such as oil, natural gas, coal, etc.), and carbon dioxide and other emissions will be emitted during the production process. Currently, the vast majority of hydrogen on the market is grey hydrogen, which accounts for about 95% of today’s global hydrogen production.
The production cost of gray hydrogen is low, the hydrogen production technology is relatively simple, and the required equipment and space are less, and the production scale is small.
blue hydrogen
Blue hydrogen is produced from natural gas through steam methane reforming or autothermal steam reforming. Although natural gas is also a fossil fuel and also produces greenhouse gases when producing blue hydrogen, due to the use of advanced technologies such as carbon capture, utilization and storage (CCUS), the greenhouse gases are captured, reducing the impact on the earth's environment and achieving Low emission production.
Green hydrogen
Green hydrogen is hydrogen produced by using renewable energy (such as solar energy, wind energy, nuclear energy, etc.), such as hydrogen production by electrolysis of water through renewable energy power generation. In the process of producing green hydrogen, there is no carbon emission at all.
Green hydrogen is an ideal form of hydrogen energy utilization, but limited by current technology and manufacturing costs, it will take time to achieve large-scale application of green hydrogen.
According to relevant statistics, 73% of global greenhouse gas emissions come from energy consumption. In order to achieve the goals of the Paris Climate Agreement, the global energy system must undergo a profound transformation, from a largely fossil fuel-based energy system to an efficient, renewable, low-carbon energy system.
Why is hydrogen energy favored?
Hydrogen is the most abundant element in the universe, and hydrogen energy is the energy released by the hydrogen element in the process of physical and chemical changes.
As an energy source, hydrogen energy has very competitive advantages:
1. Eco-friendly
Unlike traditional fossil fuels, hydrogen and oxygen can be burned to generate heat or converted into electricity by fuel cells. In the process of converting hydrogen into electricity and heat, only water is produced, and no greenhouse gases or fine dust are produced.
2. Use efficient
Hydrogen not only has a wide range of sources, but also has the advantages of good thermal conductivity, clean and non-toxic, and high heat per unit mass. Under the same mass, hydrogen contains about three times the heat of gasoline, and it is an important raw material for petrochemical industry and aerospace rocket power fuel.
3. Flexible and convenient storage and transportation
Unlike fossil fuels, hydrogen energy is secondary energy and can be produced by breaking down natural gas, oil, coal and water. In addition to the gaseous state, hydrogen can also appear as a liquid or solid hydride. When liquefied at -263 °C, the volume of hydrogen will be reduced to 1/800 of the original, and after being compressed in a high-pressure tank, it is convenient for storage and transportation.
What is the difference between the different colors of hydrogen?
Although hydrogen energy is a clean and renewable energy source, there is no carbon emission in the process of releasing energy, but the current process of producing hydrogen energy is not 100% "zero carbon".
Hydrogen is mainly present in water and fossil fuels in the form of compounds on the earth, and hydrogen energy, as a secondary energy source, needs to be "extracted" through hydrogen production technology. At present, most of the existing hydrogen production technologies rely on fossil energy and cannot avoid carbon emissions. According to the source of hydrogen energy production and the emissions in the production process, people name hydrogen energy as gray hydrogen, blue hydrogen, and green hydrogen.
grey hydrogen
Grey hydrogen is hydrogen produced by the combustion of fossil fuels (such as oil, natural gas, coal, etc.), and carbon dioxide and other emissions will be emitted during the production process. Currently, the vast majority of hydrogen on the market is grey hydrogen, which accounts for about 95% of today’s global hydrogen production.
The production cost of gray hydrogen is low, the hydrogen production technology is relatively simple, and the required equipment and space are less, and the production scale is small.
blue hydrogen
Blue hydrogen is produced from natural gas through steam methane reforming or autothermal steam reforming. Although natural gas is also a fossil fuel and also produces greenhouse gases when producing blue hydrogen, due to the use of advanced technologies such as carbon capture, utilization and storage (CCUS), the greenhouse gases are captured, reducing the impact on the earth's environment and achieving Low emission production.
Green hydrogen
Green hydrogen is hydrogen produced by using renewable energy (such as solar energy, wind energy, nuclear energy, etc.), such as hydrogen production by electrolysis of water through renewable energy power generation. In the process of producing green hydrogen, there is no carbon emission at all.
Green hydrogen is an ideal form of hydrogen energy utilization, but limited by current technology and manufacturing costs, it will take time to achieve large-scale application of green hydrogen.
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