Test of a premixing radiant burner for the low NOx combustion of natural gas/hydrogen mixtures

Catalytic combustion is an ultra low NOx combustion method, so it is expected that this method will be applied to gas turbine combustor. However, it is difficult to develop catalytic combustor because catalytic reliability at high temperature is still insufficient. To overcome this difficulty, we designed a catalytic combustor in which premixed combustion was combined. By this device, it is possible to obtain combustion gas at a combustion temperature of 1300°C while keeping the catalytic temperature below 1000°C. After performing preliminary tests using LPG, we designed two types of combustors for natural gas with a capacity equivalent to 1 combustor used in a 20MW–class multi–can type gas turbine. Combustion tests were conducted at atmospheric pressure using natural gas. As a result, it was confirmed that a combustor in which catalytic combustor segments were arranged alternately with premixing nozzles could achieve low NOx and high combustion efficiency in the range from 1000°C to 1300°C of the combustor exit gas temperature.

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Characteristics of direct injection combustion fuelled by natural gas–hydrogen mixtures using a constant volume vessel

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2008.01.007 ◽

2008 ◽

Vol 33 (7) ◽

pp. 1947-1956 ◽

Cited By ~ 24

Author(s):

J WANG ◽

Z HUANG ◽

H MIAO ◽

X WANG ◽

D JIANG

Keyword(s):

Natural Gas ◽

Direct Injection ◽

Constant Volume ◽

Hydrogen Mixtures

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Low-temperature Steam Reforming of Natural Gas to Methane-Hydrogen Mixtures

Kataliz v promyshlennosti ◽

10.18412/1816-0387-2020-3-184-189 ◽

2020 ◽

Vol 20 (3) ◽

pp. 184-189

Author(s):

D. I. Potemkin ◽

S. I. Uskov ◽

A. M. Gorlova ◽

V. A. Kirillov ◽

A. B. Shigarov ◽

...

Keyword(s):

Low Temperature ◽

Natural Gas ◽

Thermodynamic Analysis ◽

Hydrogen Concentration ◽

Steam Reforming ◽

Atmospheric Pressure ◽

Molar Ratio ◽

Reaction Products ◽

Hydrogen Mixtures

Thermodynamic analysis of the steam reforming of natural gas at a temperature of 300–600 °C, pressure 0.1–4 MPa and Н2О : С molar ratio 0.8–1.2 was carried out. Under these conditions, the reaction products are methane-hydrogen mixtures with the hydrogen concentration 10–30 vol.%. Raising the temperature and Н2О : С molar ratio as well as decreasing the pressure make it possible to increase the hydrogen concentration in the reaction products. Thermodynamic boundaries of the process in the absence of catalyst coking were determined. Experiments on the formation of methane-hydrogen mixtures from methane with the outlet hydrogen concentration 15–35 vol.% were performed on a commercial Ni-CrOx-Al2O3 catalyst at a temperature of 325–425 °С, Н2О : С molar ratio 0.8–1.0, and atmospheric pressure. Under the indicated conditions, the process was not accompanied by the formation of carbon on the catalyst.

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