Difference Between Grey Blue and Green Hydrogen

Thekey differencebetween grey blue and green hydrogen is thatgrey hydrogen is the hydrogen gas produced usingfossil fuels, and blue hydrogen is the hydrogen gas that is produced using non-renewable energy whereas green hydrogen is hydrogen gas that is produced usingrenewable energy.

Hydrogen gas is a colourless, odourless and relatively unreactive gas. This gas was artificially produced for the first time in the early 16th century through the reaction between acids and metals. Henry Cavendish was the first scientist to discover the hydrogen gas. Today, hydrogen gas is referred to as grey, blue or green hydrogen depending on the source of production of this gas.

CONTENTS

1.Overview and Key Difference
2.What is Grey Hydrogen
3.What is Blue Hydrogen
4.What is Green Hydrogen
5.Side by Side Comparison – Grey Blue vs Green Hydrogen in Tabular Form
6.概括

什么是灰氢？

灰氢是通过化石燃料（例如天然气）燃烧产生的氢气。这种类型的氢气通常占当今全球生产的氢气的95％。

通常，氢原子本身并不存在。氢倾向于在化合物（例如水（H2O分子）），碳水化合物（糖，生物质），碳氢化合物（油，天然气，沼气）等化合物中锁定氧气和碳原子。需要能源供应。例如，我们需要提供电能，以通过电解将水分子拆分，以将氢与水分开。如果我们使用化石燃料产生的电力（碳发射的存在），则通过此过程产生的氢气是“脏”。我们称其为灰氢。但是，如果我们使用干净的电（零碳发射），则产生的氢为绿色氢。在灰氢的产生过程中，形成了副产品，例如二氧化碳，即温室气体。

灰氢的生产很常见，因为这是一种廉价生产氢的方式，并且具有简单的操作方法。此外，它需要更少的设备和相对较小的空间。然而，由于温室气体的产生，灰氢的产生是不可接受的。

What is Blue Hydrogen?

Blue hydrogen is the hydrogen gas that is generated from non-renewable energy sources such as核能. This type of hydrogen gas meets the low carbon threshold. This type of hydrogen generation is considered as “fairly clean”. During blue hydrogen gas generation, carbon emission is prevented by capturing and storing carbon. The processes used in this generation usually captures about 90% of carbon; thus, the method has low to moderate carbon intensity.

什么是绿色氢？

Green hydrogen is the hydrogen gas that is generated using renewable energy such as solar energy and wind energy. This type of hydrogen gas only meets the low carbon threshold. In other words, this type of hydrogen forms when we use clean energy sources to separate hydrogen from other compounds such as water molecules. The clean sources of energy include wind, solar energy, hydropower, nuclear energy, etc.

This type of hydrogen production is considered as the gold standard because it produces zero emission of greenhouse gases.

灰蓝色和绿色氢有什么区别？

Hydrogen gas is a dimolecular substance having the chemical formula H₂. The key difference between grey blue and green hydrogen is that grey hydrogen is the hydrogen gas produced using fossil fuels, and blue hydrogen is the hydrogen gas that is produced using non-renewable energy whereas green hydrogen is hydrogen gas that is produced using renewable energy.

Below infographic shows more details of the difference between grey blue and green hydrogen.

概括– Grey Blue vs Green Hydrogen

根据这种气体的生产来源，氢气被称为灰色，蓝色或绿色氢。灰蓝色和绿色氢之间的关键区别在于，灰氢是使用化石燃料生产的氢气，而蓝色氢是使用不可再生能量生产的氢气，而绿色是使用可再生能源生产的氢气。

Reference:

1. “Hydrogen – Future Energy, Here Today.”伍德赛德,Available here.

Image Courtesy:

1. “Landscape, emissions, chimney” (CC0) viaPikist
2. “Solar panel, solar energy, windräder, renewable energy, green power, energy revolution, solarpark, voltaic, clouds, autumn sky” (CC0) viaPxfuel