Dear Abel Sánchez Rodríguez

Coal Gasification  (Underground or Surface) coupled with IGCC is the best option, because it offers CO2 capture pre-combustion & post-combustion.

Similarly through Coal Gasification the evolved CO2 can be converted catalytically into chemical feed stock.

Regards.

Muhammad Imran

ok, thanks for yours answers,  actually I´m looking for  a chemical solution during the combustion,inside boil home, the CO2 capture is expensive, I need more economic solution. But thanks for your time and yours answers.

There are three ways to reduce the CO2 emissions from a coal plant:

1. Fuel switching - replacing part or all of the fuel with a lower carbon fuel like

biomass or natural gas (fuel switching)

2. Efficiency improvement - increasing the efficiency of the plant so less CO2

is emitted to produce the same output

3. Carbon Capture strategies – capturing the CO2 in the flue gas and storing

it

- Changing the fuel to one with a lower content of Carbon (e.g. the use of natural gas instead of gasoline). In case of hydorgen as fuel, there would be no CO2 emission

- In case of a given type of fuel: Change parameters of combustion, e.g. lower the amount of Oxigen, which would result in increased production of CO and a reduction of CO2. Simililar effect results in a shortened time of combustion.

Kind regards,

Mario

Thanks a lot.

Combustion of any hydrocarbon fuel will lead to CO2 and water. To reduce CO2, fuel consumption itself should be reduced. We have attained that by magnetizing the fuel before entering the combustion chamber. The other method to reduce CO2 is to increase CO in the combustion products, but that is incomplete combustion.

Yes, we need then, find a balance between efficiency and CO2 emission. But I think that teh problem of CO emission are superior of teh CO2 emission.

Yes, CO2 is a result of complete combustion of all types of fuel, with the exception of Hydrogen.

Kind regards,

Mario

Dear @Abel Sánchez Rodríguez,

As you see complete combustion leads to CO2, else of the fuel is free of Carbon.

You may -for domestic boiler- try "rocket stove" water heater .

Regards!

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR0Iv-YPoAK77o5rOtCxm_et9u5eYLE44pV9jP_4_OaNe8FRzzm

CO2 emission depends on boiler and combustion efficiency.

If you can improve only combustion efficiency it possible to optimize work of furnace with combustions. Maybe improve  or  replase the combustions. It can improve fuel\air mixing to reduce air excess and CO2 emission. 

Reduce air excess up to co concentration 300-400 mg\n.m3 can imlrove efficiency up to 0.1-1%. You need to worry about unburned carbon. You can slag the boiler. I have positive experiment with russian coal.

if you develop new boiler you can choose combustion technology with minimum air excess.

OK, thanks, I´ll be pleasure to start a reasearch about this theme, if you have time and will.

I be waitting for your answer.

Atte

I can give you some matherial about recent research after return from holiday (about 2 weeks). You can see it in my articles too. Articles is free on elsevier site. Most result describes gas combustion, but goal is the same.

Abel:  

Need to develop advanced coal combustion technologies to improve the efficiency of coal-fired power plants  – new and more efficient combustion technologies to reduce CO2 emissions. These are some of the combustion technologies that can be used to reduce CO2 emissions:  

* Circulating Fluidized Bed Combustion - Circulating fluidized-bed (CFB) combustion is one the best technology that can be used to reduce CO2 emissions. In CFB, coal is burned efficiently in highly turbulent flow (better mixing). In CFB, the coal particles are constantly held in the flue gas, this will help to improve heat transfer, the combustion efficiency and reduce the emissions including CO2.

* Supercritical and Ultrasupercrtical Boilers: using supercritical and ultra supercritical combustion – operates at higher temperature and pressures that can achieve higher efficiency (around 50%) than conventional pulverized coal combustion with significant CO2 reductions.   

* Co-firing Biomass (5-20 Wt%) with Coal – burn coal with biomass (fuel with lower carbon content) to reduce CO2 emissions  

* Oxygen enriched coal combustion (Oxy-Fuel Combustion): for collecting CO2-rich flue gas.

* Integrated Gasification Combined Cycle (IGCC): is another alternative to achieving efficiency improvements in conventional pulverized coal-fired power plants. In IGCC, a gasifier is used to convert the coal to syngas (mainly H2 and CO). The syngas is cleaned (remove sulfur) and burned in gas turbine engines to produce electricity (combined cycle system).   

Good luck 

Dear Abel,

You may consider three main strategies:

1- Using biofuel leeds to emit neutral CO2 (zero carbon).

2- Applying CCS carbon Capturing and Storage.

3-Enhancing the overall efficiency decreases the dense of emission/energy [g/kW].

Sincerely,

Azd.

Who said that atmospheric pressure is the best pressure condition in the combustion chamber to have the most efficient burning?

Who said that Nitrogen is the best flame temperature control agent when mixed 80% with Oxigen, just because air happens to be 80% N2 and 20% O2 (approx.)?

The answer to the two above fundamental questions is pressurized oxy-fuel combustion using CO2 as flame temperature control agent, which incidentally (but very importantly) allows easy CO2 capture and sequestration.

See for example http://www.iteaspa.it/en/

How can we reduce the carbon emission of steam production (about 20 GWh / Year)?