Effects of fuel compositions on the heat generation and emission of syngas/producer gas laminar diffusion flame

Abstract

Demand for the clean and sustainable energy encourages the research and development in the efficient production and utilisation of syngas for low-carbon power and heating/cooling applications. However, diversity in the chemical composition of syngas, resulting due to its flexible production process and feedstock, often poses a significant challenge for the design and operation of an effective combustion system. To address this, the research presented in this paper is particularly focused on an in-depth understanding of the heat generation and emission formation of syngas/producer gas flames with an effect of the fuel compositions. The heat generated by flame not only depends on the flame temperature but also on the chemistry heat release of fuel and flame dimension. The study reports that the syngas/producer gas with a low H2:CO maximises the heat generation, nevertheless the higher emission rate of CO2 is inevitable. The generated heat flux at H2:CO = 3:1, 1:1, and 1:3 is found to be 222, 432 and 538 Wm-2 respectively. At the same amount of heat generated, H2 concentration in fuel dominates the emission of NOx. The addition of CH4 into the syngas/producer gas with H2:CO = 1:1 also increases the heat generation significantly (e.g. 614 Wm-2 at 20%) while decreases the emission formation. In contrast, adding 20% CO2 and N2 to the syngas/producer gas composition reduces the heat generation from 432 Wm-2 to 364 and 290 Wm-2 , respectively. The role of CO2 on this aspect, which is weaker than N2, thus suggests CO2 is preferable than N2. Along with the study, the significant role of CO2 on the radiation of heat and the reduction of emission are examined.

A General Overview of Combined Cycle Gas Turbine Plants

“…Recent studies are based on the natural gas/syngas use mixtures in order to obtain the optimal performance in terms of fuel efficiency and also flame velocity and propagation with a lower environmental impact in terms of pollutant emissions [89]. The study in [90] develops energy, environmental and economic analyses of a modern combined cycle power plant with the objective to evaluate the potential benefits for a combined cycle power plant running with alternative fuels in an area with high biomass availability, in order to reduce costs and global emissions. Different components and key parameters are examined.…”

Utilization of H2O and CO2 in Coal Particle Gasification with an Impact of Temperature and Particle Size

“…[8,17] and Eddy Break Up (EBU) model with the kinetic control parameter implemented to control the reaction mechanisms [25]. The kinetic properties of each reaction have an important role in controlling the reaction mechanisms and the values can be found in the literature sources [17,[26][27][28]. Coal particles' interaction with the fluid region is dealt with through the Lagrangian multi-phase model.…”

“…Gaseous chemical reactions are defined as in refs and and eddy break up (EBU) model with the kinetic control parameter implemented to control the reaction mechanisms . The kinetic properties of each reaction have an important role in controlling the reaction mechanisms and the values can be found in the literature sources. ,− Coal particles’ interaction with the fluid region is dealt with through the Lagrangian multiphase model. Coal particle properties are defined and an injector is set up in order to control the particle injection into the furnace.…”