Application of the CFD simulation to the evaluation of natural gas replacement by syngas in burners of the ceramic sector

Gómez, Henar Olmedo; Calleja, Miguel Castaños; Fernández, L.; Kiedrzyńska, Aleksandra; Lewtak, Robert

doi:10.1016/j.energy.2019.06.064

Cited by 23 publications

(11 citation statements)

References 4 publications

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“…Fossil fuels (such as natural gas) may be substituted by alternative fuels which supply the same amount of heat; alternate fuels include biogas [136][137][138][139][140][141] and hydrogen (pure, mixed or syngas) [142][143][144][145][146][147][148][149]; for hydrogen, its injection is feasible in existing gas networks [150][151][152][153] and it is the best choice for at-scale decarbonisation, being produced at high grade heat [154].…”

Section: Controlled Dehumidificationmentioning

confidence: 99%

“…[ [136][137][138][139][140][141][142][143][144][145][146][147][148][149][150][151][152][153][154] Improvements at ceramic slip and design New ceramic materials and product design have been developed in recent years to reduce ceramic weight, energy consumption and production cost; such materials are developed considering: product design that require less raw material and firing times, new material compositions incorporating pore-forming agents (such as carbon nanotubes) and incorporating residues to produce thermal energy [164,165]; additives such as incineration ashes, waste glass and low sintering clays contribute to lower sintering temperatures or lighter ceramics with identical mechanical properties [165].…”

Section: Controlled Dehumidificationmentioning

confidence: 99%

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Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

2020

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Thermal processes represent a considerable part of the total energy consumption in manufacturing industry, in sectors such as steel, aluminium, cement, ceramic and glass, among others. It can even be the predominant type of energy consumption in some sectors. High thermal energy processes are mostly associated to high thermal losses, (commonly denominated as waste heat), reinforcing the need for waste heat recovery (WHR) strategies. WHR has therefore been identified as a relevant solution to increase energy efficiency in industrial thermal applications, namely in energy intensive consumers. The ceramic sector is a clear example within the manufacturing industry mainly due to the fuel consumption required for the following processes: firing, drying and spray drying. This paper reviews studies on energy efficiency improvement measures including WHR practices applied to the ceramic sector. This focuses on technologies and strategies which have significant potential to promote energy savings and carbon emissions reduction. The measures have been grouped into three main categories: (i) equipment level; (ii) plant level; and (iii) outer plant level. Some examples include: (i) high efficiency burners; (ii) hot air recycling from kilns to other processes and installation of heat exchangers; and (iii) installation of gas turbine for combined heat and power (CHP). It is observed that energy efficiency solutions allow savings up to 50–60% in the case of high efficiency burners; 15% energy savings for hot air recycling solutions and 30% in the when gas turbines are considered for CHP. Limitations to the implementation of some measures have been identified such as the high investment costs associated, for instance, with certain heat exchangers as well as the corrosive nature of certain available exhaust heat.

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Section: Controlled Dehumidificationmentioning

confidence: 99%

Section: Controlled Dehumidificationmentioning

confidence: 99%

Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

2020

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“…Its advantages made it a key player in the field of electricity generation and in majority of critical industrial sectors, including cements, iron and steel, etc. [1,2]. As demand for natural gas has been growing enormously recently, many energy-conversion technologies (e.g., Pyrolysis, fermentation, etc.)…”

Section: Introductionmentioning

confidence: 99%

A New Industrial Technology for Mass Production of Graphene/PEBA Membranes for CO2/CH4 Selectivity with High Dispersion, Thermal and Mechanical Performance

et al. 2020

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Polyether block amide (PEBA) nanocomposite membranes, including Graphene (GA)/PEBA membranes are considered to be a promising emerging technology for removing CO2 from natural gas and biogas. However, poor dispersion of GA in the produced membranes at industrial scale still forms the main barrier to commercialize. Within this frame, this research aims to develop a new industrial approach to produce GA/PEBA granules that could be used as a feedstock material for mass production of GA/PEBA membranes. The developed approach consists of three sequential phases. The first stage was concentrated on production of GA/PEBA granules using extrusion process (at 170–210 °C, depending on GA concentration) in the presence of Paraffin Liquid (PL) as an adhesive layer (between GA and PEBA) and assisted melting of PEBA. The second phase was devoted to production of GA/PEBA membranes using a solution casting method. The last phase was focused on evaluation of CO2/CH4 selectivity of the fabricated membranes at low and high temperatures (25 and 55 °C) at a constant feeding pressure (2 bar) using a test rig built especially for that purpose. The granules and membranes were prepared with different concentrations of GA in the range 0.05 to 0.5 wt.% and constant amount of PL (2 wt.%). Also, the morphology, physical, chemical, thermal, and mechanical behaviors of the synthesized membranes were analyzed with the help of SEM, TEM, XRD, FTIR, TGA-DTG, and universal testing machine. The results showed that incorporation of GA with PEBA using the developed approach resulted in significant improvements in dispersion, thermal, and mechanical properties (higher elasticity increased by ~10%). Also, ideal CO2/CH4 selectivity was improved by 29% at 25 °C and 32% at 55 °C.

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“…In order to overcome these difficulties, it is a common practice to model the flame through computational fluid dynamics (CFD) or finite elements methods (FEM), which are types of discretization methods. These methods are used to approach combustion modeling problems such as, for instance, evaluating and comparing flame characteristics and dynamics for different fuel types, presenting a simulated behavior for the flame [1,2] and then predicting possible unstable conditions. Thus, these methods are appropriate when one wants to assess the behavior of flames on "what if" kind of problems.…”

Section: Introductionmentioning

confidence: 99%

On the dynamics of flame images identified through computer vision and modal methods

Chui

Neto

Trigo

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Combustion processes in industrial furnaces pose challenging difficulties when one attempts to model flame. Chemical and physical phenomena interact and affect flame behavior in such a complex way that several different approaches have been under development to tackle the modeling problem. Flame instabilities could potentially harm safety operation of the furnace. Ultimate goal of flame control is to develop means to actuate over the flame state in order to avoid dangerous situations. A critical step towards this objective is to come up with a reliable model for the flame, so that control theory could be applied to automatically maintain flame state within safe standards. This work proposes a methodology to model the dynamics of flames through computer vision to acquire and process flame images in order to extract image features evolution in time. Then, a dynamic model is identified through random decrement algorithm and Ibrahim time domain method, which are operational modal analysis techniques, together with a random contribution. Flames from seven different combustion conditions were modeled by such methodology, and their estimated values were compared with experimental data for validation. Results show that estimated and experimental data possess a high degree of correlation, thus confirming the viability of the proposed dynamic model of flames.

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Application of the CFD simulation to the evaluation of natural gas replacement by syngas in burners of the ceramic sector

Cited by 23 publications

References 4 publications

Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

A New Industrial Technology for Mass Production of Graphene/PEBA Membranes for CO2/CH4 Selectivity with High Dispersion, Thermal and Mechanical Performance

On the dynamics of flame images identified through computer vision and modal methods

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