General facts to remember Flashcards
Give the water-gas shift equation and it’s enthalpy of reaction.
CO + H2O -> H2 + CO2, with DH= -41.2kj/mol
What are the five major reactions in steam gasification of biommass in the range of 700 to 1200C??
- Steam reforming reaction, 2. The boudouard reaction, 3. char oxidation, 4. Decomposition of oxygenated minerals that releases oxygen, and 5. The cleaving and condensing of biomass lattice structure during pyrolysis.
Give the Boudouard Raction and it’s change in enthalpy.
C + CO2 -> 2CO, + 172.5 kj/mol
Give the steam reforming reaction and it’s change in enthalpy.
C + H2O -> CO + H2, 131.3 kj/mol
Give the reaction for the oxidation of char and it’s change in enthalpy.
C + 1/2 O2 -> CO , -110.5 kj/mol
What are the five major reactions in steam gasification of biommass in the range of 700 to 1200C??
- Steam reforming reaction, 2. The boudouard reaction, 3. char oxidation, 4. Decomposition of oxygenated minerals that releases oxygen, and 5. The cleaving and condensing of biomass lattice structure during pyrolysis.
Give the Boudouard Raction and it’s change in enthalpy.
C + CO2 -> 2CO, + 172.5 kj/mol
Give the steam reforming reaction and it’s change in enthalpy.
C + H2O -> CO + H2, 131.3 kj/mol
Give the reaction for the oxidation of char and it’s change in enthalpy.
C + 1/2 O2 -> CO , -110.5 kj/mol
At what temperatures does carbon dioxide dissociate into oxygen and carbon monoxide?
3000-5000 C
In the five major processes/Rxns of biomass gasification, which one is responsible for the formation of methane? Explicitly give the reactions, with biomass = C6H10O5, and the temperature range in which this occurs.
C6H10O5-> 5CO+5H2+C
- > 5CO+ CH4 + 3H2
- > 3CO+ CO2+ 2CH4 + H2
Pyrolysis, & from NOv 18 study, shows this happens between 425 and 580 C
