Rapid pyrolysis of wood block by microwave heating

Miura, Masakatsu; Kaga, Harumi; Sakurai, Akihiko; Kakuchi, Toyoji; Takahashi, Kenji

doi:10.1016/s0165-2370(03)00087-1

Cited by 283 publications

(120 citation statements)

References 18 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…Moreover, operational conditions in pyrolytic processes can be optimized to improve the yield or the quality of desirable products by means of innovative heating methods or catalysts. Microwave pyrolysis (MWP) is one focus of current research and has drawn the widespread interest of foreign and domestic researchers [5][6][7][8]. The applications of MWP include the pyrolysis of plastic waste [5,6], the pyrolysis of biomass waste [7][8][9][10][11][12][13], sewage sludge [14,15], and waste automotive engine oil [16][17][18], among others.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of the Pyrolysis of Waste Printed Circuit Boards Subject to Conventional and Microwave Heating

et al. 2012

View full text Add to dashboard Cite

This paper describes a kinetic study of the decomposition of waste printed circuit boards (WPCB) under conventional and microwave-induced pyrolysis conditions. We discuss the heating rates and the influence of the pyrolysis on the thermal decomposition kinetics of WPCB. We find that the thermal degradation of WPCB in a controlled conventional thermogravimetric analyzer (TGA) occurred in the temperature range of 300 °C-600 °C, where the main pyrolysis of organic matter takes place along with an expulsion of volumetric volatiles. The corresponding activation energy is decreased from 267 kJ/mol to 168 kJ/mol with increased heating rates from 20 °C/min to 50 °C/min. Similarly, the process of microwave-induced pyrolysis of WPCB material manifests in only one stage, judging by experiments with a microwave power of 700 W. Here, the activation energy is determined to be only 49 kJ/mol, much lower than that found in a conventional TGA subject to a similar heating rate. The low activation energy found in microwave-induced pyrolysis suggests that the adoption of microwave technology for the disposal of WPCB material and even for waste electronic and electrical equipment (WEEE) could be an attractive option.

show abstract

Section: Introductionmentioning

confidence: 99%

Kinetic Study of the Pyrolysis of Waste Printed Circuit Boards Subject to Conventional and Microwave Heating

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Another factor that may improve the heating rate is the diameter of the bamboo wood biomass. In this study the bamboo biomass was smaller than 1 mm, instead of several centimeters as in other reported work (Miura et al, 2004;Dominguez et al, 2007). In this way, the microwave pyrolysis rate was fast and the pyrolysis process was completed in less than 10 min.…”

Section: Pyrolysis Of Bamboo With Activated Carbon and Product Yieldmentioning

confidence: 88%

“…There has been recent interest in microwave pyrolysis. The conversion of wood (Miura et al, 2004); sewage sludge (Dominguez et al, 2008); waste automotive oil are among some of the other studies reported in the fields of microwave pyrolysis and bioenergy. Among the advantages reported about microwave processing of materials such as wood are increased process yield, environmental compatibility, savings in process time and low requirements for space and capital equipment.…”

Section: Pyrolysis Of Bamboo With Activated Carbon and Product Yieldmentioning

confidence: 99%

Microwave-Assisted Co-Pyrolysis of Bamboo Biomass with Plastic Waste for Hydrogen-Rich Syngas Production

Saifuddin

Priatharsini

Hakim

2016

American Journal of Applied Sciences

View full text Add to dashboard Cite

Concerns about diminishing fossil fuels and increasing greenhouse gas emissions are driving many countries to develop renewable energy sources. The knowledge of the dielectric property is essential to design and develop microwave technology for processing biomass materials. Bamboo biomass was subjected to microwave pyrolysis, to determine the influence of each process on the yield and composition of the derived gas, oil and char products. The influence of pyrolysis temperature and heating rate for the microwave pyrolysis was investigated. A microwave-enhanced co-pyrolysis of bamboo with plastic coupled with Ni/Al 2 O 3 catalyst was studied to produce a high yield of hydrogen-rich syngas under mild operating conditions. Ni was applied as the catalyst loaded on Al 2 O 3 supports. The co-pyrolysis with catalyst not only produced high hydrogen amounts but also improve the quality of the liquid bio-oil.The maximum H 2 content reached 54 vol% for the bamboo using activated carbon as the microwave absorbing agent with ratio of bamboo wood: Plastic at 80:20. The Ni/Al 2 O 3 catalyst dramatically improved the gas yield as well as the hydrogen concentration.

show abstract

“…In the modification of biocarbon porous structure, the results of using of microwave energy are also noteworthy. There are some reports [29][30][31][32] that in such conditions carbon can reach the temperature up to 900°C or even higher. High temperature and oxidizing properties of overheated water vapor create perfect conditions for activation (gasification) of carbon phase.…”

Section: Introductionmentioning

confidence: 99%

Active carbons from waste biochars

Skubiszewska–Zięba

Charmas

Kołtowski

et al. 2017

J Therm Anal Calorim

View full text Add to dashboard Cite

Studies of preparation of active carbons of good structural and adsorption properties based on commercial biochars, which become wastes after removal of precious volatile components from natural raw materials of different origin, i.e., from wheat straw, Miscanthus grass, walnut shells, and energetic willow were carried out. There was applied the physical activation under atmospheric pressure in the fluidal reactor using CO 2 or overheated steam and in the closed system in the high pressure microwave reactor under hydrothermal conditions. The obtained active carbons were investigated by means of adsorption (N 2 ), thermal (TG, DTG, DTA), spectral (Raman spectra) as well as electron microscopy methods. The adsorbents obtained as a result of modification were characterized by a welldeveloped porous structure and greater thermal resistance compared to the initial biochars.

show abstract

Rapid pyrolysis of wood block by microwave heating

Cited by 283 publications

References 18 publications

Kinetic Study of the Pyrolysis of Waste Printed Circuit Boards Subject to Conventional and Microwave Heating

Kinetic Study of the Pyrolysis of Waste Printed Circuit Boards Subject to Conventional and Microwave Heating

Microwave-Assisted Co-Pyrolysis of Bamboo Biomass with Plastic Waste for Hydrogen-Rich Syngas Production

Active carbons from waste biochars

Contact Info

Product

Resources

About