The outlet for semi-coke oven gas
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Our company is currently looking to apply its gas turbine products to semi-coke oven gas. Unfortunately, the calorific value of semi-coke oven gas is too low, at around 2 thousand kcal. The first issue we need to address is the purification of this gas. The components of the semi-coke oven gas in my possession are listed in the table below: CO, CH4, H2CnHm, N2, O2, CO2 – with values of 10.6, 14.2, 12.1, 0.4, 57.5, 2.6, 2.6 respectively. I would appreciate it if experts could suggest some methods for purifying this gas. The temperature of this semi-coke oven gas can be considered to be at normal temperature and pressure; if it is to be fed into our gas turbines, it needs to be pressurized to 2.8 MPa.
Initially, I considered using pressure swing adsorption to remove nitrogen in order to purify this coke oven gas, but the manufacturers of pressure swing adsorption systems advised that the oxygen content in the gas was high, falling within the explosive range of CH4. The explosive limit of CH4 in air is 5.6%-16%.
Why must we generate electricity? Working with chemical products should be one of the options, right?
Isn’t it the right time to focus on **energy conservation and emission reduction, as well as improving energy efficiency? Besides, we can also sell our company’s gas turbines – that’s great!
Do you mean the semi-coke gas when you talk about it? Is it the gas produced from semi-coke? Does it have a calorific value of 2000?
In my opinion, it is possible to use two sets of pressure swing adsorption units: one set to remove oxygen first, reducing its concentration to a level where methane will not explode, and then another set to remove nitrogen. This can increase the calorific value of the mixed gas.