Microwave pyrolysis of straw bale and energy balance analysis

Zhao, Xinbing; Zhang, Jian; Song, Zhanlong; Liu, Hongzhen; Li, Longzhi; Ma, Chunyuan

doi:10.1016/j.jaap.2011.04.004

Cited by 116 publications

(37 citation statements)

References 26 publications

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“…Nevertheless, this is not usually reported within literature. Only one paper discusses the benefits of microwaves on pyrolysis of straw feedstock [117]. The minimum microwave power was found to be about 0.371 kW·(kg straw)⁻¹ and the ratio of heat loss and conversion loss of electricity to microwave energy occupied in the total input energy was 42% (balancing against the energy content of the char, bio-oil and gases).…”

Section: Economic Impactmentioning

confidence: 99%

Microwave pyrolysis of biomass for bio-oil production: Scalable processing concepts

Beneroso

Monti

Kostas

et al. 2017

Chemical Engineering Journal

176

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The pursuit of sustainable hydrocarbon alternatives to fossil fuels has prompted an acceleration in the development of new technologies for biomass processing.Microwave pyrolysis of biomass has long been recognised to provide better quality bio-products in shorter timescales compared to conventional pyrolysis. Although this topic has been widely assessed and many investigations are currently ongoing, this article gives an overview beyond the physico-chemical pyrolysis process and covers engineering aspects and the limitations of microwave heating technology. Herein, we provide innovative scalable concepts to perform the microwave pyrolysis of biomass on a large scale, including essential energy and material handling requirements. Furthermore, some of the possible socio-economic and environmental implications derived from the use of this technology in our society are discussed. Such potential concepts are expected to assist the needs of the industrial bioenergy community to move this largely studied process upwards in scale.

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Section: Economic Impactmentioning

confidence: 99%

Microwave pyrolysis of biomass for bio-oil production: Scalable processing concepts

Beneroso

Monti

Kostas

et al. 2017

Chemical Engineering Journal

176

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“…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

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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.

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“…During the pyrolysis process usually 24 -30 wt % of the pyrolysis gas, 33 -40 wt % of the pyrolysis liquid and 31 -41 wt % of the pyrolysis coke were created which was demonstrated with regard to process temperature selection and also on the basis of our experiments (Helleur et al, 2001;Xiqiang et al, 2011).…”

Section: Resultsmentioning

confidence: 56%

“…The model with specially modified software serves to optimise the thermic system and to decrease energetic and material losses on the base of balances calculation. Xiqiang et al (2011) utilised packs of wheat and corn straw as the input raw material for microwave pyrolysis system (MWP) to find out the total energetic balances of the system. The results demonstrated that the MWP is more advantageous in comparison with conventional systems for example for the retort heating and product distribution.…”

Section: Introductionmentioning

confidence: 99%

“…The obtained information on the energetic balances is necessary and useful for design and operation of pyrolysis systems. It is obvious that the energetic balance is the first step to the economic analysis that later designates efficiency and practical utilisation of the tested pyrolysis device (Lian and Guomin, 2011;Quanyuan et al, 2012;Xiqiang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy Balance Sheet of a Semi Operational Thermic System

Honus¹,

Sassmanová²,

Frantík³

et al. 2014

Chemical and Process Engineering

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The article is focused onthe energetical balance of a technical system for the conversion of crushed tyres by pyrolysis. Process temperatures were set in the range from 500 to 650°C. Mass input of the material was 30 kg per hour. The aim of the article is to answer the following questions as regards the individual products: Under which process conditions can the highest quality of the individual products related to energy be reached? How does the thermal efficiency of the system change in reaction to various conditions of the process?On the basis of the experimental measurements and calculations, apart from other things, it was discovered that the pyrolysis liquid reaches the highest energetic value, i.e. 42.7 MJ.kg -1 , out of all the individual products of the pyrolysis process. Generated pyrolysis gas disposes of the highest lower calorific value 37.1 MJ.kg . From the energetic balance, the thermal efficiency of the experimental unit under the stated operational modes ranging from about 52 % to 56 % has been estimated. Individual findings are elaborated on detail in the article.

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Microwave pyrolysis of straw bale and energy balance analysis

Cited by 116 publications

References 26 publications

Microwave pyrolysis of biomass for bio-oil production: Scalable processing concepts

Microwave pyrolysis of biomass for bio-oil production: Scalable processing concepts

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

Energy Balance Sheet of a Semi Operational Thermic System

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