A CFD-DEM model simulated heat transfer between plastic and sand in a rotary furnace.. Loading solid heat carriers in the kiln can promote the heat transfer for pyrolysis.. The volatile residence time in the kiln increased with …
Exergy and energy analysis of pyrolysis of plastic wastes in rotary kiln with heat carrier. Process Saf Environ Prot (2020) Y. Zhang et al. ... These findings provide valuable insights into optimizing process parameters and refining reactor design for pyrolysis, which can be integrated with gasification and reforming processes to enhance ...
For research, it provides a robust methodology for the design of slow pyrolysis rotary kilns. It is acknowledged that the reactor model is not perfect, and some parts could be improved, but it provides a valuable step forward in the development of slow pyrolysis reactor design. Date of Award: Dec 2020:
This paper shows how a design of an indirectly heated rotary kiln for the pyrolysis of waste tyres can be developed based on numerical simulation results. The design is up from a laboratory scale tyre particle mass flow to an industrial scale tyre particle mass flow, preserving the heat- and mass-transfer characteristics. This ensures that findings from …
Based on this principle, some improved designs have been developed, like the rotary kiln [66, 67]. PSW samples are mainly heated by conduction from the reactor …
[21,22]. Large knowledge about rotary kilns exists as this type of reactor is commercially used for incineration of fuels with a wide variety of size, heating value, water content or pollutants. The pyrolysis of wood, plastics and scrap tires in a rotary kiln pyrol-ysis reactor has been investigated widely by Li et al. [23,24], who
Energy and exergy analysis is a practical thermodynamic method to assess the potentiality of waste-to-energy technologies. In this study, plastic wastes were pyrolyzed in a rotary kiln to recover ...
Development of a rotary kiln reactor for pyrolytic oil production from waste tire has been successfully fabricated and tested. The reactor has been designed with the diameter and length of 260 mm ...
Recently, the energy analysis of plastic pyrolysis using a rotary kiln reactor was reported, but the operation was not continuous [12]. We have been conducting research on fuel-gas production from plastic waste using an externally heated rotary kiln. The economic balance of a commercial operation was estimated based on the results of …
Figure 3d shows the schematic diagram of the rotary kiln reactor. A rotary kiln reactor is more efficient due to its proper mixing. The reactor efficiently mixes municipal solid waste (MSW) very well compared to other reactors. However, a slow pyrolysis process is performed in a reactor, suggesting that the heating rates are modest.
A recently developed continuous down-draft microwave-assisted pyrolysis system was used in this study. Fig. 1 shows the schematic diagram of the experimental setup; details of the system design can be found in our previous publication [22].This system has a total microwave output power of 9 kW and a processing capability of up to …
Slow pyrolysis can deliver superior ecological welfare because it provides additional bio-char yield using auger and rotary kiln reactors. Fast pyrolysis can produce bio-oil, primarily via bubbling and circulating fluidized bed reactors. Advanced pyrolysis processes have good potential to provide high prosperity for specific applications.
Design criteria and objectives. The pyrolysis retort was designed to process biomass with a moisture content up to 30% at temperatures ranging from 450°C up to 600°C (with operation at the higher temperature limited to a maximum of 1 h). ... Many production-based continuous pyrolysis reactors are rotary kiln types that use indirect …
Rotary kilns can either be used in continuous or batch mode [56], [57]. While batch rotary kilns offer some benefits over continuous rotary kiln as easier operation and simpler construction, they will not be the focus of this paper, as they seem to only play a minor role in research (See Chapter 3.1 and Table 9).
The Fraunhofer team uses a rotary kiln for pyrolysis. Thanks to its robust structure and size, the kiln can process even relatively large volumes. The plastic waste delivered by Covestro in granulated …
The pyrolysis experiments were conducted using a semi-batch rotary kiln reactor and carried out at the temperature of 300°C. The materials used in this experiment is waste tire collected from the ...
The research was conducted on the externally heated rotary kiln to study the impact of rotating speed on the pyrolysis products of waste plastics. The typical constituents of waste plastics such as polypropylene(PP) and polyethylene(PE) were selected as the testing materials. The results show that the rotating speed should be set at 4r/min to …
The efficient and sustainable disposal or value addition of waste plastic has of major importance. Recent studies on the char produced via pyrolysis have demonstrated that it is a valuable additive with multiple applications ranging from soil and water amendment, improving agricultural yield, supercapacitors, fuel cells, and in …
The composition of gases from pyrolysis of plastic wastes in the rotary kiln is shown in Fig. 3. The methane and ethene were the most common hydrocarbon gases obtained from plastic wastes pyrolysis. For instance, the gas fractions of methane and ethene produced from pyrolysis of PE are 27.3 ± 0.9 vol.%, and 27.7 ± 0.9 vol.%, …
Industrial rotary kiln The Fraunhofer team uses a rotary kiln for pyrolysis. Thanks to its robust structure and size, the kiln can process even relatively large volumes. The plastic waste delivered by Covestro in granulated form is fed into the kiln, which rotates as it heats the material inside it.
Finally, because of radial and axial temperature gradients within the kiln itself, conduction inside the kiln must be taken into account. In polar coordinates both temperature and heat fluxes depend on r, θ and z (r being held in the range of [D / 2 D / 2 + e]).. Patisson et al. (2000) have shown that the dependence on θ is very important since …
This work is to analyze energy and exergy during the pyrolysis of different types of plastic wastes, including polyethylene (PE), polypropylene (PP), polystyrene …
Introduction. Pyrolysis of biomass to create charcoal is one of the oldest known technologies. 1 Despite its long history, biomass pyrolysis technology remains under active development today. …
For example, rotary kilns can accommodate plastic waste with varied shapes and sizes. For some reactors, especially fluidized bed reactors, the feedstock should be …
The schematic diagram of the rotary kiln pyrolysis system was presented in Fig. 1. The rotary kiln pyrolyzer made of 316 stainless steel has an inner diameter and a length of 300 mm and 65 mm, respectively. The heat carrier was heated by the electric plate heater during the experiment.
Pyrolysis has created many (and will open more) possibilities for high-value utilization of biomass. To obtain the optimal amount of desired pyrolysis products, especially high-quality bio-oil, a great deal of effort has been conducted in both academia in the past few decades, to clarify fundamental mechanisms of biomass pyrolysis and …
Recycling the ever-increasing plastic waste has become an urgent global concern. One of the most convenient methods for plastic recycling is pyrolysis, owing to its environmentally friendly nature and its intrinsic properties. Understanding the pyrolysis process and the degradation mechanism is crucial for scale-up and reactor design. …
In this study, plastic wastes were pyrolyzed in a rotary kiln to recover energy products including gas, oil and char. The effects of heat carrier loading in the kiln and plastic waste types on the pyrolysis process, including carbon distribution, properties of liquid oil/gas, energy and exergy of products, were investigated. Heat carrier ...
DOI: 10.1016/J.CES.2021.116573 Corpus ID: 233544403; Development of an up-scalable rotary kiln design for the pyrolysis of waste tyres @article{Proch2021DevelopmentOA, title={Development of an up-scalable rotary kiln design for the pyrolysis of waste tyres}, author={Fabian Proch and K. bach and P. Grammenoudis}, journal={Chemical …
The entrained flow reactor is constructed through a simple beam/tube shape design, but the drawback is the requirement of feedstock pre-treatment. ... [55] designed a continuous rotary kiln pyrolysis reactor with a capacity of 25 kg/h for wheat straw processing at 400–600 ℃. The pre-heated ceramic balls were used as heat carriers and …
DOI: 10.1360/tb-2020-0765 Corpus ID: 225320722; The simulation of particle movement and heat transfer in rotary kiln for plastic waste pyrolysis @article{Gao2020TheSO, title={The simulation of particle movement and heat transfer in rotary kiln for plastic waste pyrolysis}, author={Yuan Gao and Jin Bao and Aimin Li and Tingting Jiang and Yutao …
Request PDF | On Sep 1, 2020, Yutao Zhang and others published Liquid oils produced from pyrolysis of plastic wastes with heat carrier in rotary kiln | Find, read and cite all the research you ...
