Preliminary Computation on NOx Emission Reduction for Different Temperatures

2015 ◽  
Author(s):  
Jobaidur R. Khan
Keyword(s):  
Natural Gas ◽  
Nox Reduction ◽  
Industrial Area ◽  
Nox Emission ◽  
Gas Combustion ◽  
Exhaust Temperature ◽  
Different Temperatures ◽  
Wet Compression ◽  
Natural Gas Combustion ◽  
Lower Temperature

Wet compression is an enhancing tool for power augmentation in land based gas turbine system. One of the advantages of wet compression is NOx reduction. High exhaust temperature (in the range of 1300 and 1400 K) from combustion chamber is responsible for NOx generation. High amount of NOx causes acid rain in the industrial area, which is a big concern. As wet compression reduces NOx emission, it is very important to validate this fact. Comparison needs to be made between the combustion of natural gas (methane mainly) with the combustion of same with air in reduced temperature with the presence of water vapor. As a preliminary step of this, NOx emission needs to be modelled with proper prediction of it in a natural gas combustion environment. As a preliminary study, a simple rectangular geometry is considered here. Result shows that NOx emission is reduced with lower temperature, which needs to be validated further.

IGR Solid-State Electrochemical NOx Control for Natural Gas Combustion Exhaust Gases

1989 ◽  
Vol 111 (3) ◽  
pp. 394-397 ◽  
Author(s):  
M. S. Hossain ◽  
M. Neyman ◽  
W. J. Cook ◽  
A. Z. Gordon
Keyword(s):  
Solid State ◽  
Natural Gas ◽  
High Surface ◽  
Nox Reduction ◽  
High Surface Area ◽  
Combustion Products ◽  
Gas Combustion ◽  
Electrochemical Technology ◽  
Natural Gas Combustion ◽  
Nox Control

Solid-state electrochemical technology, embodied in the IGR process, is used to reduce nitrogen oxides (NOx) to nitrogen and oxygen, and thereby control NOx emissions from natural gas powered engines. The IGR deNOx process is based on solid-state, flow-through, high surface area, porous oxygen ion conductive ceramic electrolytes. Recent bench-scale experiments conducted for the Gas Research Institute have demonstrated NOx reduction in multicomponent gas streams, the inert portion of which simulate natural gas combustion products. The reduction products were analyzed by in situ gas chromatography to verify NOx reduction rates inferred from electrochemical measurements. IGR process advantages compared with existing NOx control technologies are reviewed.

Syngas as a Reburning Fuel for Natural Gas Combustion

2014 ◽  
Vol 35 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Małgorzata Wilk ◽  
Aneta Magdziarz ◽  
Monika Zajemska ◽  
Monika Kuźnia
Keyword(s):  
Sewage Sludge ◽  
Natural Gas ◽  
Residence Time ◽  
Nox Reduction ◽  
Combustion Process ◽  
Combustion Products ◽  
Experimental Investigations ◽  
Gas Combustion ◽  
Numerical Tests ◽  
Natural Gas Combustion

Abstract The paper aims to confirm the syngas application as a reburning fuel to reduce e.g. NO emission during natural gas combustion. The main aim of this modelling work was to predict pollutants generated in the exhaust gases and to indicate the influence of the syngas on the natural gas combustion process. The effect of residence time of fuel-air mixture was also been performed. Calculations were made with CHEMIKN-PRO for reburning process using syngas. The boundary conditions of the reburning process were based on experimental investigations. The addition of 5, 10, 15 and 19% of reburning fuel into natural gas combustion was studied. The effects of 0.001 to 10 s of residence time and the addition of 5, 10, and 15% of syngas on combustion products were determined. The performed numerical tests confirmed that co-combustion of the natural gas with syngas (obtained from sewage sludge gasification) in the reburning process is an efficient method of NOx reduction by c.a. 50%. Syngas produced from sewage sludge can be utilised as a reburning fuel.

Research of pressure influence in the gas supply system on the energy consuption level of gas devices

2019 ◽  
Vol 6 (2) ◽  
pp. 56-63
Author(s):  
L. D. Pylypiv ◽  
І. І. Maslanych
Keyword(s):  
Natural Gas ◽  
Residential Buildings ◽  
Supply System ◽  
Normal Operation ◽  
Gas Combustion ◽  
Efficient Operation ◽  
Gas Consumption ◽  
Natural Gas Combustion ◽  
Gas Supply

There are investigated the influence of operating pressures in the gas supply system on the level of such energy indicators as efficiency, gas flow and gas overrun by gas equipment in residential buildings. There is established a relationship between the values of operating pressures in the gas supply system and the gas consumption level of household appliances. The causes of insufficient pressure in the gas networks of settlements are analyzed in the article. There is also developed an algorithm for calculating the change in the efficiency of gas appliances depending on the operational parameters of the gas network. It has been found that the most efficient operation of gas appliances is observed at an overpressure at the inlet of gas appliances of about 1200 Pa.To ensure the required quality of natural gas combustion among consumers and minimize gas consumption there are justified the following measures in the article: coordinating a domestic regulatory framework for assessing the quality of natural gas with international norms and standards; improving the preparation of gas coming from local wells before supplying it to gas distribution networks; auditing low pressure gas pipelines and reconstructing areas affected by corrosion; ensuring standard gas pressure in the network for the normal operation of domestic gas appliances; stating quality indicators of natural gas combustion by gas sales organizations.

Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion

2002 ◽  
Vol 125 (1) ◽  
pp. 40-45 ◽  
Author(s):  
K. P. Vanoverberghe ◽  
E. V. Van den Bulck ◽  
M. J. Tummers ◽  
W. A. Hu¨bner
Keyword(s):  
Natural Gas ◽  
Combustion Chamber ◽  
Gas Flow ◽  
State Transition ◽  
Gas Combustion ◽  
Bifurcation Phenomena ◽  
Major Species ◽  
Partially Premixed ◽  
Natural Gas Combustion ◽  
Low Nox Emission

Five different flame states are identified in a compact combustion chamber that is fired by a 30 kW swirl-stabilized partially premixed natural gas burner working at atmospheric pressure. These flame states include a nozzle-attached tulip shaped flame, a nonattached torroidal-ring shaped flame (SSF) suitable for very low NOx emission in a gas turbine combustor and a Coanda flame (CSF) that clings to the bottom wall of the combustion chamber. Flame state transition is generated by changing the swirl number and by premixing the combustion air with 70% of the natural gas flow. The flame state transition pathways reveal strong hysteresis and bifurcation phenomena. The paper also presents major species concentrations, temperature and velocity profiles of the lifted flame state and the Coanda flame and discusses the mechanisms of flame transition and stabilization.

Development of a Natural Gas Combustion System for High Specific Power

MTZ worldwide ◽  
2015 ◽  
Vol 76 (10) ◽  
pp. 30-35
Author(s):  
Bertold Hüchtebrock ◽  
José Geiger ◽  
Avnish Dhongde ◽  
Harsh Sankhla
Keyword(s):  
Natural Gas ◽  
Specific Power ◽  
Combustion System ◽  
Gas Combustion ◽  
High Specific Power ◽  
Natural Gas Combustion

Application of Reburning for NOx Control to a Firetube Package Boiler

1985 ◽  
Vol 107 (3) ◽  
pp. 739-743 ◽  
Author(s):  
J. A. Mulholland ◽  
W. S. Lanier
Keyword(s):  
Natural Gas ◽  
Reaction Order ◽  
Nox Reduction ◽  
Process Variable ◽  
Nox Emission ◽  
Boiler Load ◽  
Second Stage ◽  
Primary Zone ◽  
Dominant Process ◽  
Nox Control

A 730 kW (2.5 × 106 Btu/hr) firetube package boiler was used to demonstrate the application of reburning for NOx emission control. An overall reduction of 50 percent from an uncontrolled NOx emission of 200 ppm was realized by diverting 15 percent of the total boiler load to a natural-gas-fired second stage burner. Tests indicate that the overall reaction order of destruction with respect to initial NOx is greater than one; thus, larger reductions can be expected from reburning applications to systems with higher initial NOx. Rich zone stoichiometry has been identified as the dominant process variable. Primary zone stoichiometry and rich zone residence time are parameters that can be adjusted to maximize NOx reduction. Reburning applied to firetube package boilers requires minimal facility modification. Natural gas would appear to be an ideal reburning fuel as nitrogen in the reburning fuel has been shown to inhibit NOx reduction.

Sequential-Based Process Modeling of Natural Gas Combustion in a Fluidized Bed Reactor

2012 ◽  
Vol 26 (4) ◽  
pp. 2058-2067 ◽  
Author(s):  
Abolhasan Hashemi Sohi ◽  
Ali Eslami ◽  
Amir Sheikhi ◽  
Rahmat Sotudeh-Gharebagh
Keyword(s):  
Natural Gas ◽  
Fluidized Bed ◽  
Process Modeling ◽  
Fluidized Bed Reactor ◽  
Gas Combustion ◽  
Natural Gas Combustion
Sign in / Sign up

Export Citation Format

Share Document