The High Ccosts of Green Hydrogen

See Green Hydrogen Gets a Boost in the U.S. With $4 Billion Plant by Phred Dvorak of The WSJ. Excerpts: 

"The problem is that hydrogen is seldom found on its own and must be separated out of compounds such as water or natural gas. That process is expensive, takes a lot of energy and can emit large amounts of carbon dioxide, particularly when the hydrogen is made from natural gas, as most is today.

Even hydrogen made in the cheapest and dirtiest ways costs a little more than $1 a kilogram, according to estimates from a February Goldman Sachs report—around double the price of natural gas in the U.S. Making it a cleaner way, by removing and storing some of the carbon dioxide emitted, adds significantly to the cost. Producing green hydrogen with renewables could cost as much as $5 a kilogram, estimated Anne-Sophie Corbeau, a global research scholar at Columbia University’s School of International and Public Affairs.

When other costs such as storage and transportation are included, hydrogen becomes too expensive to sub in for many fossil-fuel uses, Ms. Corbeau said."