Electrolysis, powered by renewables, is often seen as the ideal way to produce hydrogen. But electrolysis is expensive and not always efficient, writes Roger Arnold. There are other ways that are more efficient and also climate friendly. This is part 2 of a two-part series on hydrogen written by independent energy expert Roger Arnold. Part 1 deals with the uses of hydrogen in transport. … [Read more...]
The lowdown on hydrogen — part 1: transportation
The hydrogen economy had been written off as a failure by most industry watchers, writes independent energy expert and former software engineer Roger Arnold. Lately, however, hydrogen seems to be making a comeback. Not because of any special technology breakthroughs but because persistence and general advances have begun to pay off. … [Read more...]
Why the future belongs to decentralised renewables, not centralised hydrogen and giga-scale nuclear
What the future of our energy system will look like continues to be a subject of heated debate. According to one well-established tradition, writes Professor John Mathews of Macquarie University in Australia, the route to decarbonisation will run via massive nuclear power systems to the hydrogen economy. But China and to some extent India are emerging as the principal practitioners of an alternative vision of energy growth, underpinning their … [Read more...]
Stephane Quere, Innovation Director Engie: “Hydrogen is a big topic for us”
Hydrogen, which can be used to store energy, produce electricity and fuel vehicles, is one of the innovation priorities for French energy giant Engie (€70 billion revenue). This is a company that prides itself on its diversity however, explains Stephane Quere, Innovation Director at Engie, with activities stretching from Europe to Africa and Asia, and businesses from gas distribution to security systems. Some of the main priorities for Engie are … [Read more...]
Biofuels turn out to be a climate mistake
Biofuels are usually regarded as inherently carbon-neutral, but once all emissions associated with growing feedstock crops and manufacturing biofuel are factored in, they actually increase CO2 emissions rather than reducing them, writes John DeCicco of the University of Michigan. According to DeCicco, biofuels are actually more harmful to the climate than gasoline. Courtesy of The Conversation. … [Read more...]
Using clean cars as power plants: it can be done in the UAE
The combined engine capacity of the new cars we build in just one year is more than the entire electricity generation capacity in the world. If we power our cars with fuel cells, we can use them as clean power plants the 96% of the time we are not driving in them, generating all the electricity we need, at competitive costs, with zero emissions. Frank Wouters, Director of the EU-GCC Clean Energy Network, and Ad van Wijk, Professor Future Energy … [Read more...]
100% solar?
Some argue that the world can be 100% powered by solar energy, but this is too simplistic, writes David Hone, Chief Climate Change Advisor for Royal Dutch Shell. He points out that solar PV delivers only electricity, which makes up just 20% of final energy use, and argues that other energy demands are better served by other low-carbon options, such as hydrogen and synthesis gas. A recent Shell publication indicates that 30% solar power by 2100 is … [Read more...]
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