skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling biomass gasification system using multistep kinetics under various oxygen-steam conditions

 [1];  [1];  [1]
  1. Department of Mechanical Engineering, Iowa State University, 2025 Black Engineering Building Ames IA 50011
Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Environmental Progress and Sustainable Energy
Additional Journal Information:
Journal Volume: 34; Journal Issue: 4; Related Information: CHORUS Timestamp: 2017-10-20 15:34:31; Journal ID: ISSN 1944-7442
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United Kingdom

Citation Formats

Banerjee, Sudhanya, Tiarks, Jordan A., and Kong, Song-Charng. Modeling biomass gasification system using multistep kinetics under various oxygen-steam conditions. United Kingdom: N. p., 2015. Web. doi:10.1002/ep.12109.
Banerjee, Sudhanya, Tiarks, Jordan A., & Kong, Song-Charng. Modeling biomass gasification system using multistep kinetics under various oxygen-steam conditions. United Kingdom. doi:10.1002/ep.12109.
Banerjee, Sudhanya, Tiarks, Jordan A., and Kong, Song-Charng. 2015. "Modeling biomass gasification system using multistep kinetics under various oxygen-steam conditions". United Kingdom. doi:10.1002/ep.12109.
title = {Modeling biomass gasification system using multistep kinetics under various oxygen-steam conditions},
author = {Banerjee, Sudhanya and Tiarks, Jordan A. and Kong, Song-Charng},
abstractNote = {},
doi = {10.1002/ep.12109},
journal = {Environmental Progress and Sustainable Energy},
number = 4,
volume = 34,
place = {United Kingdom},
year = 2015,
month = 3

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/ep.12109

Save / Share:
  • This effort, which is part of the Argonne National Laboratory energy program for ERDA, is being directed toward support studies for the national endeavor on in-situ coal gasification. This task involves the investigation of reaction-controlling variables and product distributions for the gasification of both coals and chars utilizing steam and oxygen. Included in this task is the investigation of the effects of using brackish water as the water supply. (auth)
  • Ignition and combustion mechanisms in diesel engines were studied using the KIVA code, with modifications to the combustion, heat transfer, crevice flow, and spray models. A laminar-and-turbulent characteristic-time combustion model that has been used successfully for spark-ignited engine studies was extended to allow predictions of ignition and combustion in diesel engines. A more accurate prediction of ignition delay was achieved by using a multistep chemical kinetics model. The Shell knock model was implemented for this purpose and was found to be capable of predicting successfully the autoignition of homogeneous mixtures in a rapid compression machine and diesel spray ignition undermore » engine conditions. The physical significance of the model parameters is discussed and the sensitivity of results to the model constants is assessed. The ignition kinetics model was also applied to simulate the ignition process in a Cummins diesel engine. The post-ignition combustion was simulated using both a single-step Arrhenius kinetics model and also the characteristic-time model to account for the energy release during the mixing-controlled combustion phase. The present model differs from that used in earlier multidimensional computations of diesel ignition in that it also includes state-of-the-art turbulence and spray atomization models. In addition, in this study the model predictions are compared to engine data. It is found that good levels of agreement with the experimental data are obtained using the multistep chemical kinetics model for diesel ignition modeling. However, further study is needed of the effects of turbulent mixing on post-ignition combustion.« less
  • Commercial steam reforming (nickel-based) catalysts are used for hot gas cleaning and upgrading in biomass gasification with steam-oxygen mixtures. The gasifier used was an atmospheric and bubbling fluidized bed with an internal diameter of 15 cm and a total height of 3.2 m and was continuously fed with 5--20 kg of biomass/h. Eight different catalysts from four different manufacturers (BASF AG, TOPSOE A/S, ICI, and UCI) have been tested. They were located in a downflow fixed-bed reactor of 4 cm i.d. placed in a slip flow after the gasifier. A guard bed with a calcined dolomite was also used beforemore » the catalytic bed to decrease the tar content in the raw gas below the limit of 2 g of tar/m{sup 3}{sub n}, thus avoiding the catalyst deactivation by coke formation. The main variables studied were the temperature of the catalytic bed and the gas composition in the bed. Effects concerning tar elimination will be reported in part 2 of this work. This paper is mainly devoted to characterization of catalysts and to upgrading of the flue gas. H{sub 2} and CO contents increased by 4--14 and 1--8 vol%, dry basis, respectively. CO{sub 2}, CH{sub 4}, and steam contents decreased by 0--14, 87--99, and 2--6 vol %, dry basis, respectively. Other parameters varied in the following ways: the lower heating value decreased by 0.3--1.7 MJ/m{sup 3}{sub n}, gas yield increased by 0.1--0.4 m{sup 3}{sub n}/kg of biomass daf, and apparent thermal efficiency increased by 1--20%. The results presented allow screening of the best catalysts to get an upgraded and useful gas in biomass gasification with steam-oxygen mixtures.« less