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Energy and exergy analysis of rice husk high-temperature pyrolysis

Based on a two-stage fixed bed high-temperature pyrolysis system, the influence of temperature (800–1200 °C) on total energy and exergy, as well as exergy and energy efficiency of unreacted carbon, tar and pyrolysis gas were analyzed. The results indicate energy and exergy of each component in the p... Full description

Journal Title: International Journal of Hydrogen Energy 14 December 2016, Vol.41(46), pp.21121-21130
Main Author: Wang, Xinyu
Other Authors: Lv, Wei , Guo, Li , Zhai, Ming , Dong, Peng , Qi, Guoli
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2016.09.155
Link: http://dx.doi.org/10.1016/j.ijhydene.2016.09.155
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recordid: sciversesciencedirect_elsevierS0360-3199(16)32885-3
title: Energy and exergy analysis of rice husk high-temperature pyrolysis
format: Article
creator:
  • Wang, Xinyu
  • Lv, Wei
  • Guo, Li
  • Zhai, Ming
  • Dong, Peng
  • Qi, Guoli
subjects:
  • Rice Husk
  • High-Temperature Pyrolysis
  • Exergy Analysis
  • Energy Analysis
ispartof: International Journal of Hydrogen Energy, 14 December 2016, Vol.41(46), pp.21121-21130
description: Based on a two-stage fixed bed high-temperature pyrolysis system, the influence of temperature (800–1200 °C) on total energy and exergy, as well as exergy and energy efficiency of unreacted carbon, tar and pyrolysis gas were analyzed. The results indicate energy and exergy of each component in the pyrolysis gas as well as the total energy and exergy increase with temperature. Energy value and exergy value contributions of the components in the pyrolysis gas at 800 °C and 900 °C are CO > CH4 > H2 > CO2. From 1000 °C to 1200 °C, the rank turns into CH4 > CO > H2 > CO2. The energy efficiency and exergy efficiency of pyrolysis gas are in the range of 64.57–72.68% and 52.93–60.64%, respectively. The increasing rate of energy value and exergy value of the pyrolysis gas reaches maximum at 1000 °C. The energy efficiency and exergy efficiency of unreacted carbon and tar decrease with temperature. The consumption of energy for tar collection and loss of energy and exergy carried by tar can be reduced by increasing temperature. The loss exergy efficiency increases slightly below 900 °C and decreases from 38.8% to 34.6% above 900 °C. •Energy and exergy of rice husk pyrolysis in a two-stage fixed bed are analyzed.•Energy and exergy contributions of each component in the pyrolysis gas are obtained.•Energy and exergy efficiency of pyrolysis gas are 64.57–72.68% and 52.93–60.64%, respectively.•Energy and exergy efficiency of fixed carbon and tar decrease with temperature.•The highest irreversibility efficiency occurs at 900 °C.
language: eng
source:
identifier: ISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2016.09.155
fulltext: no_fulltext
issn:
  • 03603199
  • 0360-3199
url: Link


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titleEnergy and exergy analysis of rice husk high-temperature pyrolysis
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ispartofInternational Journal of Hydrogen Energy, 14 December 2016, Vol.41(46), pp.21121-21130
identifierISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2016.09.155
subjectRice Husk ; High-Temperature Pyrolysis ; Exergy Analysis ; Energy Analysis
descriptionBased on a two-stage fixed bed high-temperature pyrolysis system, the influence of temperature (800–1200 °C) on total energy and exergy, as well as exergy and energy efficiency of unreacted carbon, tar and pyrolysis gas were analyzed. The results indicate energy and exergy of each component in the pyrolysis gas as well as the total energy and exergy increase with temperature. Energy value and exergy value contributions of the components in the pyrolysis gas at 800 °C and 900 °C are CO > CH4 > H2 > CO2. From 1000 °C to 1200 °C, the rank turns into CH4 > CO > H2 > CO2. The energy efficiency and exergy efficiency of pyrolysis gas are in the range of 64.57–72.68% and 52.93–60.64%, respectively. The increasing rate of energy value and exergy value of the pyrolysis gas reaches maximum at 1000 °C. The energy efficiency and exergy efficiency of unreacted carbon and tar decrease with temperature. The consumption of energy for tar collection and loss of energy and exergy carried by tar can be reduced by increasing temperature. The loss exergy efficiency increases slightly below 900 °C and decreases from 38.8% to 34.6% above 900 °C. •Energy and exergy of rice husk pyrolysis in a two-stage fixed bed are analyzed.•Energy and exergy contributions of each component in the pyrolysis gas are obtained.•Energy and exergy efficiency of pyrolysis gas are 64.57–72.68% and 52.93–60.64%, respectively.•Energy and exergy efficiency of fixed carbon and tar decrease with temperature.•The highest irreversibility efficiency occurs at 900 °C.
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descriptionBased on a two-stage fixed bed high-temperature pyrolysis system, the influence of temperature (800–1200 °C) on total energy and exergy, as well as exergy and energy efficiency of unreacted carbon, tar and pyrolysis gas were analyzed. The results indicate energy and exergy of each component in the pyrolysis gas as well as the total energy and exergy increase with temperature. Energy value and exergy value contributions of the components in the pyrolysis gas at 800 °C and 900 °C are CO > CH4 > H2 > CO2. From 1000 °C to 1200 °C, the rank turns into CH4 > CO > H2 > CO2. The energy efficiency and exergy efficiency of pyrolysis gas are in the range of 64.57–72.68% and 52.93–60.64%, respectively. The increasing rate of energy value and exergy value of the pyrolysis gas reaches maximum at 1000 °C. The energy efficiency and exergy efficiency of unreacted carbon and tar decrease with temperature. The consumption of energy for tar collection and loss of energy and exergy carried by tar can be reduced by increasing temperature. The loss exergy efficiency increases slightly below 900 °C and decreases from 38.8% to 34.6% above 900 °C. •Energy and exergy of rice husk pyrolysis in a two-stage fixed bed are analyzed.•Energy and exergy contributions of each component in the pyrolysis gas are obtained.•Energy and exergy efficiency of pyrolysis gas are 64.57–72.68% and 52.93–60.64%, respectively.•Energy and exergy efficiency of fixed carbon and tar decrease with temperature.•The highest irreversibility efficiency occurs at 900 °C.
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abstractBased on a two-stage fixed bed high-temperature pyrolysis system, the influence of temperature (800–1200 °C) on total energy and exergy, as well as exergy and energy efficiency of unreacted carbon, tar and pyrolysis gas were analyzed. The results indicate energy and exergy of each component in the pyrolysis gas as well as the total energy and exergy increase with temperature. Energy value and exergy value contributions of the components in the pyrolysis gas at 800 °C and 900 °C are CO > CH4 > H2 > CO2. From 1000 °C to 1200 °C, the rank turns into CH4 > CO > H2 > CO2. The energy efficiency and exergy efficiency of pyrolysis gas are in the range of 64.57–72.68% and 52.93–60.64%, respectively. The increasing rate of energy value and exergy value of the pyrolysis gas reaches maximum at 1000 °C. The energy efficiency and exergy efficiency of unreacted carbon and tar decrease with temperature. The consumption of energy for tar collection and loss of energy and exergy carried by tar can be reduced by increasing temperature. The loss exergy efficiency increases slightly below 900 °C and decreases from 38.8% to 34.6% above 900 °C. •Energy and exergy of rice husk pyrolysis in a two-stage fixed bed are analyzed.•Energy and exergy contributions of each component in the pyrolysis gas are obtained.•Energy and exergy efficiency of pyrolysis gas are 64.57–72.68% and 52.93–60.64%, respectively.•Energy and exergy efficiency of fixed carbon and tar decrease with temperature.•The highest irreversibility efficiency occurs at 900 °C.
pubElsevier Ltd
doi10.1016/j.ijhydene.2016.09.155
orcidid0000-0002-6501-242X
eissn18793487
date2016-12-14