EFOY vs. sodium borohydride fuel cellsPlayers: Medis, Millennium Cell, Morphic/Exergy ("MAX E"), etc. Sodium Bororhydride (NaBH4) as a fuel is toxic, corrosice, caustic, caustic substance. Upon contact with water and metals it releases hydrogen in an exothermic reaction:
NaBH4 + 2H2O => NaBO2 + 4H2 + Heat |
After reaction with water, hydrogen is released an remainder is NaBO2, residual water and caustic hydrozide which is highly corrosice and toxic. This remaining slurry i shazardous waste that MUST NOT be released to the environment. It MUST be disposed in specially designated HAZARDOUS WASTE area.
FLAMMABILITY
|
Methanol |
Gasoline |
Sodium
Borohydride
|
Flash Point
|
11°C |
-20°C |
-253°C
after contact w. water
|
|
Can fire be extinguished with water?
|
yes
|
hardly
|
no
|
Lower explosion threshold [Vol %]
|
5.5
|
0.6
|
3.02
|
Self-ignition temperature
|
455°C
|
>200°C
|
220°C |
Hazardous Substance Code
|
F
|
F+ |
F |
TRANSPORT (LAND)
|
Methanol |
Gasoline |
Sodium
Borohydride
|
Hazard Class
|
3 |
3 |
4.3
|
Packing Group
|
II
|
II |
I |
UN
|
1230/3473
|
1203
|
1426
|
HEALTH
|
Methanol |
Gasoline |
Sodium
Borohydride
|
| Oral rat LD50 |
5628 mg/kg
|
5000 mg/kg
|
69 mg/kg
|
|
Risk Phrases |
R11
R23/24/25
R39/23/24/25
|
R12 Extremely flammable
R38/45
R48/20/2
R1/22
R65/67
R51/53 |
R15
R24/25
R35
|
Safety Phrases
|
S1/2
S7
S16
S36/37
S45
|
S2/16/23//24/29/36
S37
S45
S53
S61
S62
|
S7/8
S26
S36
S43
S45
|
ENVIRONMENT
|
Methanol |
Gasoline |
Sodium
Borohydride |
| Biodegradability |
|
|
|
|
Water endagerment class
|
1 |
3 |
|
Fuel based on renewables?
|
YES
|
Potentially
|
NO
|
Hazardous Substance Code
|
|
|
|
|
|
|
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