Only a tiny percentage of hydrogen produced today is green; in fact, all low-carbon types of hydrogen (that includes blue, pink, yellow, turquoise, and aqua) account for less than 1% of global
Hydrogen has many colours, and we frequently refer to green, turquoise, blue and grey hydrogen. Since this versatile energy carrier is actually a colourless gas, one might well ask what these colours actually mean.
From green to pink hydrogen, we reveal the rainbow of hydrogen colours and the different types of technology used to produce each. Here''s our guide to unlocking the current hydrogen colour code.
The colours correspond to the GHG emission profile of the energy source or process used to extract hydrogen. The brighter colours (e.g. green, blue, even turquoise and pink!) have lower emissions, while the gloomier colours (grey, brown and black) have higher emissions and a gloomier outlook for global warming.
5 · Depending on production methods, hydrogen can be grey, blue or green – and sometimes even pink, yellow or turquoise – although naming conventions can vary across countries and over time.
To a scientist who uses the unofficial color spectrum that classifies hydrogen by its production method, "green hydrogen" is a very specific term – hydrogen produced via electrolysis using renewable electricity.
This review summarizes the main pathways associated with hydrogen production and the colors assigned to each route, known as the "hydrogen rainbow". The hydrogen feedstock, production process, and CO 2 emissions of the following colors are explained in detail: green, blue, gray, black, brown, yellow, pink, red, and orange
Colors of Hydrogen. A rainbow of colors dominates almost every conversation on the transition to a low-carbon economy: green, grey, blue, turquoise, pink, yellow, orange – an ever-increasing palette to describe the same colorless, odorless, and highly combustible molecule, hydrogen.
But generating enough hydrogen to match a potential 100% rise in demand by 2030 will require multiple production methods, not just green, but blue, yellow, pink, turquoise — a rainbow. This kaleidoscope of color codes helps differentiate between the various production methods.
Different colours are used to label different types of hydrogen, but what do they all mean? Green hydrogen is made using electrolysis run with renewables.