Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production
Synthetic fuel production via gasification of residual biomass streams from the pulp and paper industry can be an opportunity for the mills to enable improved resource utilization and at the same time reduce the production of excess heat. This paper summarizes initial oxygen-blown gasification exper...
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doaj-5a946b749030456598e3430a345f88a32021-01-16T00:06:16ZengMDPI AGProcesses2227-97172021-01-01916316310.3390/pr9010163Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel ProductionFredrik Weiland0Sandra Lundström1Yngve Ögren2RISE Energy Technology Center AB, Box 726, S-941 28 Piteå, SwedenRISE Energy Technology Center AB, Box 726, S-941 28 Piteå, SwedenRISE Energy Technology Center AB, Box 726, S-941 28 Piteå, SwedenSynthetic fuel production via gasification of residual biomass streams from the pulp and paper industry can be an opportunity for the mills to enable improved resource utilization and at the same time reduce the production of excess heat. This paper summarizes initial oxygen-blown gasification experiments with two bark residues from a European pulp and paper mill, i.e., a softwood bark and a hardwood bark. The gasification process was characterized by measuring syngas yields and process efficiency to find optimum operating conditions. In addition, impurities in the syngas and ash behavior were characterized. Maximum yields of CO and H<sub>2</sub> were obtained from softwood bark and amounted to approximately 29 and 15 mol/kg fuel, respectively. Optimum cold gas efficiency was achieved at an oxygen stoichiometric ratio of <i>λ</i> = 0.40 and was approximately 76% and 70% for softwood bark and hardwood bark, respectively. Increased <i>λ</i> had a reducing effect on pollutants in the syngas, e.g., higher hydrocarbons, NH<sub>3</sub>, HCl, and soot. The situation for sulfur species was more complex. Evaluation of the bark ashes indicated that slag formation could start already from 800 °C. Furthermore, a non-intrusive laser diagnostics technique gave rapid feedback on the millisecond scale. Measured syngas temperature and water content were in good agreement with the applied reference methods.https://www.mdpi.com/2227-9717/9/1/163gasificationoxygen blownsyngasbark residuespulp millonline TDLAS process measurement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fredrik Weiland Sandra Lundström Yngve Ögren |
spellingShingle |
Fredrik Weiland Sandra Lundström Yngve Ögren Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production Processes gasification oxygen blown syngas bark residues pulp mill online TDLAS process measurement |
author_facet |
Fredrik Weiland Sandra Lundström Yngve Ögren |
author_sort |
Fredrik Weiland |
title |
Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production |
title_short |
Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production |
title_full |
Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production |
title_fullStr |
Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production |
title_full_unstemmed |
Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production |
title_sort |
oxygen-blown gasification of pulp mill bark residues for synthetic fuel production |
publisher |
MDPI AG |
series |
Processes |
issn |
2227-9717 |
publishDate |
2021-01-01 |
description |
Synthetic fuel production via gasification of residual biomass streams from the pulp and paper industry can be an opportunity for the mills to enable improved resource utilization and at the same time reduce the production of excess heat. This paper summarizes initial oxygen-blown gasification experiments with two bark residues from a European pulp and paper mill, i.e., a softwood bark and a hardwood bark. The gasification process was characterized by measuring syngas yields and process efficiency to find optimum operating conditions. In addition, impurities in the syngas and ash behavior were characterized. Maximum yields of CO and H<sub>2</sub> were obtained from softwood bark and amounted to approximately 29 and 15 mol/kg fuel, respectively. Optimum cold gas efficiency was achieved at an oxygen stoichiometric ratio of <i>λ</i> = 0.40 and was approximately 76% and 70% for softwood bark and hardwood bark, respectively. Increased <i>λ</i> had a reducing effect on pollutants in the syngas, e.g., higher hydrocarbons, NH<sub>3</sub>, HCl, and soot. The situation for sulfur species was more complex. Evaluation of the bark ashes indicated that slag formation could start already from 800 °C. Furthermore, a non-intrusive laser diagnostics technique gave rapid feedback on the millisecond scale. Measured syngas temperature and water content were in good agreement with the applied reference methods. |
topic |
gasification oxygen blown syngas bark residues pulp mill online TDLAS process measurement |
url |
https://www.mdpi.com/2227-9717/9/1/163 |
work_keys_str_mv |
AT fredrikweiland oxygenblowngasificationofpulpmillbarkresiduesforsyntheticfuelproduction AT sandralundstrom oxygenblowngasificationofpulpmillbarkresiduesforsyntheticfuelproduction AT yngveogren oxygenblowngasificationofpulpmillbarkresiduesforsyntheticfuelproduction |
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