Pulse Combustion Drying

Zbiciński, Ireneusz; Kudra, Tadeusz; Liu, Xiangdong

doi:10.1002/9783527631704.ch02

Cited by 3 publications

(5 citation statements)

References 32 publications

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“…During the drying process, high temperatures can cause the denaturation of whey proteins [ 30 ] and can induce alterations to the physical and functional properties of the resulting powder (e.g., particle structure, particle size distribution, flowability, bulk density or solubility). Egg white powder obtained by PSD (76.6 °C of outlet drying temperature) has been reported to present finer particles, in agreement with other studies [ 13 , 24 , 31 , 32 ], with whiter color and superior surface characteristics than an equivalent SD powder dried under similar drying conditions [ 28 ]. However, studies detailing the application of PSD to food matrices are very limited and, to the best of our knowledge, no study has been published on skim milk.…”

Section: Introductionsupporting

confidence: 90%

Pulse Spray Drying for Bovine Skimmed Milk Powder Production

Romo,

Chutani,

Fartdinov

et al. 2024

Foods

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Pulse Spray Drying (PSD) has potential as a sustainable means of skimmed milk powder (SMP) production. In this study, powders were obtained from PSD using different drying outlet temperatures (70, 80, 90 and 100 °C), and their characteristics were compared to those of traditional Spray Drying (SD). Native whey proteins were well preserved and Solubility Indexes were over 98% in all cases, despite powders obtained by PSD displaying lower solubility than the SD ones. No visual difference was observable in the powders (ΔE < 2); however, PSD powders were found to be yellower with a higher Browning Index. The drying technology did not have a significant effect on powder moisture content and bulk density. Particle size distribution and scanning electron microscopy images confirmed the presence of fine particles (<10 μm) in all samples that might have provided poor flowability and wetting behavior (overall Carr Index and Hausner ratio were 33.86 ± 3.25% and 1.52 ± 0.07, respectively). Higher amounts of agglomerated particles were found at low temperatures in the products processed with both technologies, but PSD samples showed a narrower particle size distribution and hollow particles with more wrinkles on the surface (probably due to the fast evaporation rate in PSD). Overall, PSD provided SMP with comparable physicochemical characteristics to SD and, once optimized at the industrial level, could offer significant advantages in terms of thermal efficiency without significant modification of the final product quality.

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Section: Introductionsupporting

confidence: 90%

Pulse Spray Drying for Bovine Skimmed Milk Powder Production

Romo,

Chutani,

Fartdinov

et al. 2024

Foods

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“…In the latter, there is a ''sweet spot'' temperature that is prone to produce the lowest amount of both NOx and CO emissions-1680 K to 1900 K. 6 Higher temperatures produce very high NOx, whereas lower temperatures produce considerably high CO, since its formation is dependent on incomplete combustion processes. In a pulsejet, however, there appears to be no such tradeoff between NOx and CO, and both the pollutants behave similarly with increasing temperature, as seen in Figure 5 and from Zbicinski et al (2014). 33 This might be attributable to the very essence of pulsejet operation which operates on acoustic oscillations, which is in turn dependent on the average temperature inside the device (since sound speed is temperature dependent).…”

Section: Pulsejetmentioning

confidence: 99%

“…In a pulsejet, however, there appears to be no such tradeoff between NOx and CO, and both the pollutants behave similarly with increasing temperature, as seen in Figure 5 and from Zbicinski et al (2014). 33 This might be attributable to the very essence of pulsejet operation which operates on acoustic oscillations, which is in turn dependent on the average temperature inside the device (since sound speed is temperature dependent). Hence, on one hand, increasing the temperature causes higher NOx production, while at the same time inducing a higher frequency of operation which promotes uneven mixing, thereby producing more CO. 28 This said, it is noted that both the pollutants are still within acceptable levels and are in line with those seen in conventional combustors.…”

Section: Pulsejetmentioning

confidence: 99%

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A review of pollutants emissions in various pressure gain combustors

Anand

Gutmark

2019

International Journal of Spray and Combustion Dynamics

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Recent years have witnessed a significant growth in the advancement and study of various unsteady combustors because of the prospective stagnation pressure gain offered by them. The pressure gain combustion produced by this class of combustors is poised to produce a step-change increase in the thermodynamic efficiency of gas-turbine engines. The current manuscript is oriented toward presenting a review on the pollutant emission characteristics of these devices; specifically, studies done so far on wave rotor combustors, pulsejet combustors, pulse detonation combustors, and rotating detonation combustors are evaluated. Because of the inherent fluid dynamic unsteadiness peculiar to pressure gain combustion devices, their emissions behavior is not well understood, and is notably different from the more conventional, steady combustors. The global view provided herein is expected to further the understanding of pressure gain combustion systems and ascertain the practicality of implementing them in real-world applications.Â Time in mode hr ð ÞOf the above terms, the time of operation cannot be altered since it is mission specific. This implies that

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“…Pulse combustion drying technology utilizes one or more pulse combustors to produce high-temperature and high velocity pulsating jets, which can be used for drying wet materials, high drying rates, high thermal efficiency, improved product quality and less environment impact [79,80] . Another key advantages of this drying technology are [79,81] : increased heat and mass transfer rates (by a factor of 2 to 5), Zbicinski [82] presented an analysis of potential and real benefits of pulse combustion process applied in drying process. The phenomenon of pulse combustion, its mechanism, pulse combustors designs, advantages and disadvantages of this technology were described and reviewed.…”

Section: Other Techniquesmentioning

confidence: 99%

Thermal Treatment of Solid Wastes Using Drying Technologies: A Review

Perazzini

Freire

et al. 2015

Drying Technology

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The proper treatment of organic or inorganic solid wastes meets economic and especially environmental interests. Added-value by-products of market interest can be obtained through the recovery, reuse and treatment of solid wastes, which are otherwise discarded inappropriately in large quantities in the environment. In this review, the drying process is presented as an alternative environmental technology for the thermal treatment of residues of different natures from different origins. The main techniques applied to solid waste drying are described and in parallel the most relevant studies found in the literature which approaches this theme are analyzed. Moreover, the main dryers used nowadays are presented, as well as their most important characteristics. Some general aspects of the thermal and energetic performance of these dryers fundamental for process feasibility analysis are also discussed in this review. Essential aspects of the solid waste drying process are primarily presented with the purpose of showing the particularities that this theme offers when it comes to putting the theory into practice. Downloaded by [Selcuk Universitesi] at 17:53 05 February 2015 2

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Pulse Combustion Drying

Cited by 3 publications

References 32 publications

Pulse Spray Drying for Bovine Skimmed Milk Powder Production

Pulse Spray Drying for Bovine Skimmed Milk Powder Production

A review of pollutants emissions in various pressure gain combustors

Thermal Treatment of Solid Wastes Using Drying Technologies: A Review

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