Int. J. of Exergy   »   2017 Vol.23, No.3

 

 

Title: Energy and exergy characteristics of syngas produced from air gasification of walnut sawdust in an entrained flow reactor

 

Authors: Yaning Zhang; Yijun Zhao; Bingxi Li; Xiaoyan Gao; Baocheng Jiang

 

Addresses:
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, 55108, USA
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

 

Abstract: Energy and exergy are two important tools for evaluating energy sources. The energy and exergy of syngas produced from air gasification of walnut sawdust in an entrained flow reactor were detailed for typical reactor temperatures (700, 800, and 900°C) and equivalence ratios (0.22, 0.25, 0.28, 0.31, and 0.34). The results showed that the overall energy distribution was CO > (CH4, H2, N2, C2H4) > CO2 whereas the overall exergy distribution was CO > (CH4, H2) > C2H4 > N2 > CO2. The results that different component gases contributed differently to the energy and exergy of syngas were due to the fact that different component gases had different exergy/energy ratios. However, both the energy and exergy of syngas achieved the highest values at the same reactor temperature and equivalence ratio. The results obtained from this study can help understand the energy and exergy of syngas produced from biomass gasification as well as the effects of reactor temperature, equivalence ratio (ER), and fuel characteristics on the energy and exergy of syngas.

 

Keywords: energy; exergy; syngas; gasification; sawdust.

 

DOI: 10.1504/IJEX.2017.10006882

 

Int. J. of Exergy, 2017 Vol.23, No.3, pp.244 - 262

 

Submission date: 16 Sep 2016
Date of acceptance: 29 Apr 2017
Available online: 05 Aug 2017

 

 

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