Biomass enhances the reduction of oxidized pellets with carbon monoxide

Dabin Guo, Baihui Cui, Zhihua Chen, Wangwang Yan, Bin Ji, Qi Zhang, Yuhuan Liu, Shiyi Luo, Mian Hu, Roger Ruan

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the reduction mechanism of using CO to reduce biomass-oxidized pellets (BOP) and general-oxidized pellets (GOP) was deeply analyzed. The effect of biomass addition on the reduction of oxidized pellets and the change of reduction kinetics were studied. The addition of 2 wt% biomass into pellets increases pores of the oxidized pellets, promotes the rate of CO entering the pellets and the overflow of CO2, which results in faster reduction of the oxidized pellets. The reduction reactions of BOP and GOP were controlled by internal diffusion, mixing control and interface control sequentially. Also, addition of the biomass to the pellets decreases the activation energy required for their reduction, from 87.30 to 80.65 kJ·mol−1. The addition of biomass shortens the reduction time by 3% which can reduce the energy consumption. Therefore, the biomass together with CO enhances the reduction of oxidized pellets and has real environmental benefits.

Original languageEnglish (US)
Article number124973
JournalBioresource Technology
Volume331
DOIs
StatePublished - Jul 1 2021

Bibliographical note

Funding Information:
This research was supported by the National Natural Science Foundation of China, China (51808241, 21706087), Natural Science Foundation of Jiangsu province, China (BK20201109), SKL of Xiamen University (No. 202012) and National Key Research and Development Program of China, China (2018YFB1502900). The authors also acknowledge with thanks that Dr. Mahmood Laghari, department of Energy and Environment, Sindh Agriculture University, Tandojam, Pakistan has helped in editing the English language and overall draft of this manuscript.

Funding Information:
This research was supported by the National Natural Science Foundation of China , China ( 51808241 , 21706087 ), Natural Science Foundation of Jiangsu province, China ( BK20201109 ), SKL of Xiamen University (No. 202012 ) and National Key Research and Development Program of China , China ( 2018YFB1502900 ). The authors also acknowledge with thanks that Dr. Mahmood Laghari, department of Energy and Environment, Sindh Agriculture University, Tandojam, Pakistan has helped in editing the English language and overall draft of this manuscript.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Biomass
  • Biomass-oxidized pellets
  • Direct reduced iron
  • General-oxidized pellets
  • Mechanisms

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