by kublikhan » Wed 24 Jul 2013, 15:27:48
$this->bbcode_second_pass_quote('Tanada', 'I') am impatient for someone somewhere to scale up these laboratory proven technologies and find out if they are practical on an industrial scale. We can test in the lab and talk about the results forever without having any real impact unless someone gets the first plant built as proof of concept and economical viability.
Did you see Audi's plant?
$this->bbcode_second_pass_quote('', 'A')udi has opened the doors to its new power-to-gas facility, which will make what the automaker calls E-gas, in Werlte, Germany. The plant produces hydrogen and synthetic methane and these clean fuels come from renewable energy, water and carbon dioxide. Audi says it's the first automaker to "develop a chain of sustainable energy carriers."
The Audi E-gas plant uses electrolysis to split water molecules into oxygen and hydrogen, which will someday power fuel-cell vehicles. For now, methanation is the process used to make the synthetic natural gas. Audi reacts the hydrogen with CO2 to generate renewable synthetic methane. The E-gas can be delivered through existing natural gas pipes since, chemically speaking, it's nearly identical to natural gas. Delivery of E-gas through the infrastructure is scheduled to start in the fall of 2013.
Audi says E-gas from the plant can power 1,500 new Audi A3 Sportback G-tron vehicles for 15,000 CO2-neutral kilometers (about 9,321 miles) each year. The Werlte plant is part of Audi's comprehensive e-fuels strategy and sustainability initiative.
The Audi e-gas plant will produce about 1,000 metric tons of e-gas per year, chemically binding some 2,800 metric tons of CO2. This roughly corresponds to the amount that a forest of over 220,000 beech trees absorbs in one year. Water and oxygen are the only by-products.
The Audi e-gas project transcends the automobile industry. It shows how large amounts of green electricity can be stored efficiently and independently of location by transforming it into methane gas and storing it in the natural gas network, the largest public energy storage system in Germany. With the e-gas project, Audi is a part of and a driver of the energy revolution. Major German energy utilities have since taken up the idea of power-to-gas cogeneration and are following Audi with initial projects of their own.
$this->bbcode_second_pass_quote('', '-')-close to 1 to 1 is not good enough. The industrial process should have a positive EROEI, or why bother. Throwing good energy away for bad energy makes no sense. Unless the process is incredibly cheap. Fischer-Tropf has been around for almost a century, yet has never panned out except in time of war.
--Unlike the this CO2 + H2O-perpetual-energy scheme, corn ethanol production has an positive energy return of 1.34 to 1. Yet it is not a HUGE winner, but rousing failure.