What is equivalence ratio in biomass gasification?

What is equivalence ratio in biomass gasification?

The equivalence ratio (ER) is perhaps the most important parameters in improving the quality of gas yield in air gasification of plastic [14]. It can be defined as the actual air–fuel ratio (used in the gasification) to the stoichiometric air–fuel ratio for combustion. Its significance was reported by Xiao et al.

What is the equivalence ratio used in the gasification process?

At atmospheric pressure gasification, the optimum equivalence ratio for the temperature range of 600-900 K is found to be 3.0. At increased gasification temperatures of 1000-1500 K, the optimum equivalence ratio is 2.0 and at gasification temperatures of 1600-2500 K it is 1.5.

What is a good equivalence ratio?

If the equivalence ratio is equal to one, the combustion is stoichiometric. If it is < 1, the combustion is lean with excess air, and if it is >1, the combustion is rich with incomplete combustion.

What is the equivalence ratio for rich mixture *?

Air–fuel equivalence ratio (λ) λ = 1.0 is at stoichiometry, rich mixtures λ < 1.0, and lean mixtures λ > 1.0.

Which is better lean or rich mixture?

The key difference between lean and rich fuel mixture is that we use a lean mixture for maximum efficiency while we use a rich mixture for maximum power in an engine. We use the terms lean and rich fuel mixtures to describe combustion processes in engines and industrial furnaces.

What is the equivalent ratio for 2 5?

Step-by-step explanation: Therefore, some of the equivalent ratios of 2:5 are 4:10, 6:15 and 8:20.

What does AFR mean in cars?

Air/Fuel Ratio (AFR) AFR stands for air to fuel ratio. Fuel doesn’t burn on its own. It has to be mixed with air. AFR tells you how many parts of air are mixed with each part of fuel. For example, a 14.7:1 AFR (or just 14.7) means the mixture is 14.7 parts air to one part fuel.

How do you measure AFR?

The way you read an air-fuel ratio (AFR) gauge is by looking at the ratio and then looking at the lambda value, which is your air fuel ratio divided by the stoich. If your AFR is higher than the stoich, your fuel mixture is lean. But if the AFR is lower than the stoich, that means that your fuel mixture is rich.

What is difference between updraft and downdraft gasifier?

In downdraft gasifiers, both fuel and the gas move downward. In updraft gasifiers, fuel moves downward and gas upward. In co-current gasifiers, the fuel and gas move in the same direction, usually downward (downdraft gasifiers), but the movement can also be upward.

What is gasifier and its types?

Gasifier equipment is generally classified as upward draft, downward draft and cross draft gasifiers, based on the direction of air/oxygen flow in the equipment. It should be noted that there are types of gasifier equipment which are different from types of gasification processes.