Re: estimated volume Catalyst volume is important stuff. How true is it? Who made the estimate? Any idea?
On Wed, Apr 20, 2011 at 3:35 PM, .:.gotjosh <ene...@begreen.nu> wrote: > Axil, > I agree about 5g in proportion, but the K&E report says: > "The central container seen in figure 3 has an estimated volume of 50 cm3 > and it contains 50 grams of nickel." > I also thought about the powder density/porosity and chose a number close > to the full density of nickel metal, as i imagined those pores would/could > be filled with the hydrogen gas. > If I use your suggestion of 3g/cc then the amount of hydrogen at 25atm will > be 0.07g > and the pressure will increase in a similar way: > 25.05 293 20 > 26.75 313 40 > 28.46 333 60 > 30.17 353 80 > 31.88 373 100 > 36.16 423 150 > 40.43 473 200 > 44.71 523 250 > 48.98 573 300 > 57.53 673 400 > 66.08 773 500 > 74.62 873 600 > 83.17 973 700 > 108.81 1273 1000 > > > On Wed, Apr 20, 2011 at 16:15, Axil Axil <janap...@gmail.com> wrote: > >> I question the amount of nickel used. The one liter (1000 cc) Cat-E used >> 100 grams of catalyst. By proportion, a 50 cc volume should use only 5 grams >> of catalyst. The density of the catalyst is too high. It should be about >> 3g/cc since it is porous. >> >> >> On Wed, Apr 20, 2011 at 5:33 AM, .:.gotjosh <ene...@begreen.nu> wrote: >> >>> I would love a copy of that doc... please do send one my way. >>> >>> i also made a calculation based on that line from the K&E report >>> - surprisingly i got zero comments - although i consider it a very relevant >>> issue... 25 atm at startup is much more at 500C... i would love it if >>> someone could double check these calculations and perhaps include them in >>> the details documents. >>> >>> using the estimate of 0.09 grams of hydrogen pressurized >>> into a 50cc chamber with >>> 5cc occupied by 50g of nickel (at 8.8g/cc) >>> and 45cc unoccupied (for the hydrogen to fill) >>> with a starting pressure of ~24atm at 20C >>> the pressure will grow to ~64atm at 500C >>> >>> atm deg K deg C >>> 24.22 293 20 >>> 25.87 313 40 >>> 27.53 333 60 >>> 29.18 353 80 >>> 30.83 373 100 >>> 34.97 423 150 >>> 39.10 473 200 >>> 43.23 523 250 >>> 47.36 573 300 >>> 55.63 673 400 >>> 63.90 773 500 >>> 72.16 873 600 >>> 80.43 973 700 >>> 105.23 1273 1000 >>> >>> (are my calculations correct ? - >>> >>> https://spreadsheets.google.com/pub?hl=en_GB&hl=en_GB&key=0Aj441n89_v_VdHhXMHZ6MmlRWlh0RVJKYVBwd3B4amc&output=html >>> ) >>> >>> >>> (note: K&E say 0.11g hydrogen but they are ignoring the space that the >>> nickel occupies - and the 50cc is an estimate anyway) >>> >>> On Wed, Apr 20, 2011 at 00:43, Jed Rothwell <jedrothw...@gmail.com>wrote: >>> >>>> Alan J Fletcher <a...@well.com> wrote: >>>> >>>>> >>>>> That's from the K&E report : >>>>> >>>> >>>> Thanks. >>>> >>>> - Jed >>>> >>>> >>> >> >
