The feed stream to a reactor contains: ethylene 16 per cent, oxygen 9 per cent, nitrogen 31 per cent, and hydrogen chloride. If the ethylene flow is 5000 kg/h, calculate the individual component flows and the total stream flow. All percentages are by weight

Chemical Engineering A flotation cell is fed with solids at the rate of 250tph with a pulp having a density of 1.35. Material solid density is 3.2. The concentrate contains 15% of the feed solids mass and it has a pulp density of 1.15. The concentrate solid density is 3.5. How much water must be added to the tails to give an L/S ratio of 1.25. Give your assumptions and continue answering.

In a counter-current absorption tower, a process gas containing 0.04 (mole fraction) ammonia is scrubbed with pure water. The exit gas contains 0.002 (mole fraction) ammonia.The diameter of the tower is 1m, and the packing has a large area per volume of 200 m2m–3. The overall mass transfer coefficient based on the liquid side driving force, KL, is 1.5×10−5ms–1. The total gas and liquid concentrations are 0.6kmolm–3and 20 kmolm–3respectively and the gas flowrateis 0.03kmols–1. The actual liquid to gas ratio is 1.5 times that of the minimum liquid to gas ratio. The equilibrium for ammonia between the air and water is given by y* = 1.04x. If the operator increases the gas flow by 20% while keeping the liquid flow and the entering gas and liquid compositions constant,what are the new mole fractions of ammonia in the exit gas and the exit liquid? Assume that the overall mass transfer coefficient does not change with the gas flow.

A ball mill grinds a nickel sulphide ore from a feed size 80% passing size of 8 mm to a product 80% passing size of 200 microns. The ball mill discharge was reground in a Tower mill to increase liberation before re-cycling to the float circuit. The Tower mill has an installed power of 40 kW and produces a P80 of 30 microns from a F80 of 200 microns. What are the reduction ratios for the ball mill and tower mill, respectively? O A. 100: 15 O B. 25.5: 12.5 OC 73.5: 4.6 O D. 37.5: 6.4 OE. 40.0; 6.67