Mullite Formation in Al2O3/SiO2/SiC Composites for Processing Porous Radiant Burners

ABSTRACTUse of porous ceramic burners for natural gas combustion is an optimum alternative to enhance energy efficiency and decrease emission of pollutant gases per generated power. Materials requirements for the operation of such porous burners are mainly thermal shock and chemical resistance and those can be reached with cellular ceramics. Mullite was theoretically identified among the best materials for this application; however, its potential was not properly explored yet. Even though mullite can be synthesized from different compounds and processing routes, control of final material characteristics is complicated mainly due to the formation of amorphous phase. In this work, using a technological approach mullite burners were processed by the replication method starting from different mixtures of Al2O3/SiO2/SiC. Rheological study of the slurries has given additives content for the coating of the polyurethane sponges. After varying sintering temperatures up to 1600 °C and isotherm times for 12 h, microstructural aspects and product phases of the final composites were characterized in order to understand the influence of Al2O3/SiO2/SiC ratios in the formation of mullite phase and amorphous content.

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

JOURNAL OF HYDROCARBON POWER ENGINEERING ◽

10.31471/2311-1399-2019-2(12)-56-63 ◽

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.

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Preparation of Ordered Porous Ceramic Joint on C/SiC Composites and Its Joining Technique

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2013.12556 ◽

2013 ◽

Vol 28 (7) ◽

pp. 763-768 ◽

Cited By ~ 2

Author(s):

Hao WANG ◽

Qing-Jun ZHOU ◽

Ke JIAN ◽

Chang-Wei SHAO ◽

Yi-Hua ZHU

Keyword(s):

Porous Ceramic ◽

Sic Composites ◽

Ordered Porous

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Development of environment-friendly dual fuel pulverized coal-natural gas combustion technology for the co-firing power plant boiler: Experimental and numerical analysis

Energy ◽

10.1016/j.energy.2021.120550 ◽

2021 ◽

Vol 228 ◽

pp. 120550

Author(s):

Iman Rahimipetroudi ◽

Kashif Rashid ◽

Je Bok Yang ◽

Sang Keun Dong

Keyword(s):

Numerical Analysis ◽

Power Plant ◽

Natural Gas ◽

Dual Fuel ◽

Environment Friendly ◽

Gas Combustion ◽

Power Plant Boiler ◽

Combustion Technology ◽

Natural Gas Combustion ◽

Plant Boiler

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Resurrecting a Major Coke Calcining Energy Recovery Plant

ASME 2007 Power Conference ◽

10.1115/power2007-22039 ◽

2007 ◽

Author(s):

Tommy John ◽

Ray Deyoe ◽

John Gray ◽

Paul Gross

Keyword(s):

Water Treatment ◽

Acid Corrosion ◽

Energy Prices ◽

Particulate Emission ◽

Gas Combustion ◽

Field Instrumentation ◽

Reconstruction Effort ◽

Sulfuric Acid Corrosion ◽

Treatment Facilities ◽

Natural Gas Combustion

Refurbishment of the Port Arthur Steam Energy facility began in early 2005 after key commercial agreements were concluded. The plant, which had been idle since October 2000, was originally constructed in 1983 and 1984 to recover energy from three petroleum coke calcining kilns at the Great Lakes Carbon LLC facility. Major repairs were needed because of extensive damage from sulfuric acid corrosion of the HRSG system and deterioration of water treatment facilities. In addition, major improvements were made including an acoustic cleaning system, multiclones for particulate emission reduction, magnesium oxide injection for corrosion control, a complete new control system with all new field instrumentation, stack improvements to increase dispersion, and improvements to the HRSG system and water treatment system to improve reliability and reduce maintenance. Rising energy prices dictated a fast-paced schedule. Following a major reconstruction effort with a peak force of 435 people, the facility was in full operation by August 2005, less than nine months from commencement. The facility is producing approximately 450,000 lb/hr of high pressure steam, the majority of which is sold to the neighboring Valero Port Arthur refinery, and producing 4 to 5 MW of power. By capturing 1800–2000°F heat that would other wise be wasted, the project recovers nearly 5 trillion Bru/year, off setting over 200 tons/yr of NOx and over 280,000 tons/yr of carbon dioxide that would otherwise be emitted by natural gas combustion. The success of the project can be attributed to management of the project which included innovative inspection techniques, development of the scope of work, design of improvements, and extensive construction and repairs.

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The effect of nitrogen content in oxy-natural gas combustion on the CO concentration in premixed flame

Journal of the Energy Institute ◽

10.1016/j.joei.2015.11.003 ◽

2017 ◽

Vol 90 (1) ◽

pp. 21-29 ◽

Cited By ~ 1

Author(s):

Wojciech Jerzak

Keyword(s):

Natural Gas ◽

Nitrogen Content ◽

Premixed Flame ◽

Gas Combustion ◽

Co Concentration ◽

Natural Gas Combustion

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Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1520159 ◽

2002 ◽

Vol 125 (1) ◽

pp. 40-45 ◽

Cited By ~ 5

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.

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