Producer gas is fuel gas that is manufactured by blowing a coke or coal with air and steam simultaneously. It mainly consists of carbon monoxide, hydrogen, as well as substantial amounts of nitrogen. The caloric value of the producer gas is low. Such a producer gas contains 28% CO, 3.5% CO2, 0.5% 02 and 68% N2. 100 kg of this gas is burned with 20% excess air. If the combustion is only 90% complete, determine the following:

(a) The composition of the flue gas

(b) The weight of the gaseous products

(c) If the excess air increased to 40%, whether the combustion reaction in completed? Justify your anaswer.

Butane is burned with air. No carbon monoxide is present in the combustion produets.
Calculate the molar composition of the product gas for each of the following three cases: (i)
theoretical air supplicd, 100 % conversion of butane: (i) 20% excess air. 100% conversion of
butane: and (il) 33% excess air. 90% conversion of butane.

The reverse water-gas reaction is an undesirable side-reaction during industrial hydrogen production:
CO2 + H2 ↔ CO + H2O
(A)What is the equilibrium composition of a mixture at 1500K that initially contained 40 mol. % CO2,
30 mol. % H2, 20 mol. % CO and 10 mol. % H2O? Employ canonical partition functions.
(B) Employ the JANAF table data to find this mixture composition at equilibrium at 1500K and
compare it to the results in part (A). Do they agree? How can one explain the differences?