Thinking of how the new E-cat cartridge can contain both Ni and Hydrogen, I stumbled upon an interesting website on "Material for Hydrogen Storage" : http://www.sigmaaldrich.com/materials-science/material-science-products.html?TablePage=16375039

With these materials mixed with the Ni powder, hydrogen can be stored at relative low pressure, something that will help to obtain sufficient hydrogen storage capacity over at least 180 days.
Storing hydrogen under large pressure will require special materials for the E-cat cartridge which on top also need to able to withstand high temperatures.

Quote from: teslaalset on February 29, 2012, 02:41:22 PM
Thinking of how the new E-cat cartridge can contain both Ni and Hydrogen, I stumbled upon an interesting website on "Material for Hydrogen Storage" : http://www.sigmaaldrich.com/materials-science/material-science-products.html?TablePage=16375039

With these materials mixed with the Ni powder, hydrogen can be stored at relative low pressure, something that will help to obtain sufficient hydrogen storage capacity over at least 180 days.
Storing hydrogen under large pressure will require special materials for the E-cat cartridge which on top also need to able to withstand high temperatures.

@teslaalset:
Apparently, Rossi had problems getting the safety permits (or certification) to ship hydrogen thus he has eliminated the canister of hydrogen altogether. (The canister is still required for the 1MW commercial units)

Rossi offers the following explanation:

(excerpt taken from interview with Sterling Allan on 1/15/2012)
"Sterling Allan:   Alright. Also, we were talking about the logistics of re-fill. What about the hydrogen canister?

Andrea Rossi:   Here we have a big surprise. This is a big surprise. It is very likely that the E-Cats we are working with now, work without canisters of hydrogen, because we have resolved the problem with a substance that inside the reactor stores and recycles the hydrogen. Consuming it, but you know we consume a picogram of hydrogen, and so a charge of ten grams lasts six months of operation. So basically, we have resolved the problem of the canister. The problem of the canister was very big for the domestic E-Cats. Because to get a safety certifications for an apparatus that has a tank of hydrogen, was very difficult. And so we have resolved the problem. This is a tremendous improvement of our technology that we made in these last times.

Sterling Allan:   So if I understand what you just said, there is no hydrogen canister required?

Andrea Rossi:   No."


Regards,

Chess

Chess,
I was one of the guys attending the live interview, so I am aware of what Rossi announced back then.
There may be two arguments for leaving the hydrogen canister out:
- safety
- cost

If I look to the latest Hyperion photo's, Defkalion is still having the canister construction, while they claim to fullfull safety regulations (I think they refer to only Greece regulations, maybe European as well). So, it's not sure they are confident in fullfilling US regulations (mainly UL), but they seem to have no worries about having a canister as part of the construction.

Cost consequences may be severe, since using a canister also requires some mechnism to load and regulate pressure and additional electronic control. So its seems Rossi's price difference compared to the latest indications, also by Defkalion's, clearly shows that a much simpler construction is possible by having the Hydrogen included in the Ni powder cartridge.

So, I think Rossi has a headstart regarding costprice and maintainance costs.
However, the Hyperion is specified of having a COP > 20, so operational costs of the initial announced Hyperion seems more economical compared to the E-cat for heavy users.

the hydrogen could be produced during reaction,
so that there is no need for external cylinder
Peter

It has been a week now since Defkalion was to start a series of tests of their technology . So far the silence is deafening . Anyone heard any news ?