A two-step approach to the hydrothermal gasification of carbohydrate-rich wastes: Process design and economic evaluation

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Abstract

A two-step approach to hydrothermal gasification of carbohydrate-rich wastes and wastewaters is a promising route for H2 production and simultaneously as a water clean-up technology. Experimental data and kinetic models are used to further develop the process for industrial scale. In this work, a preliminary process design is conducted in order to assess the market potential of the two-step process. For stabilisation, two cases are considered: the use of excess vs. stoichiometric H2, and for gasification, the utilisation of sequential reactors for gasification housing Pt and Ru catalysts is compared to a single reactor with Pt alone. A total of four options are conceptually designed and economically evaluated. Using state-of-the-art insights and process techniques and the current market scenario, a minimum H2 selling price of 3.4 $ kg−1 was obtained. A sensitivity study showed that the feedstock price, concentration and quantity, played a crucial role in the selling price of H2. These variables are all correlated and are dependent on the industry from where the feedstock is obtained. Industrial wastewater streams rich in carbohydrate residues and associated with gate fees were found to be promising feedstock for the process. Further advancement in the areas of catalyst development (hydrothermal stability, affordability) as well as increased H2 yields are necessary in order to improve the economics of this process on industrial scale.

Original languageEnglish
Pages (from-to)25524-25541
Number of pages18
JournalInternational journal of hydrogen energy
Volume44
Issue number47
Early online date6 Sep 2019
DOIs
Publication statusPublished - 4 Oct 2019

Fingerprint

gasification
carbohydrates
Carbohydrates
Gasification
Feedstocks
economics
Process design
Economics
evaluation
Sales
Wastewater
reactors
catalysts
Catalysts
Stabilization
stabilization
industries
routes
Kinetics
sensitivity

Keywords

  • Economics
  • Gasification
  • Hydrogen
  • Process design
  • Wastewater

Cite this

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title = "A two-step approach to the hydrothermal gasification of carbohydrate-rich wastes: Process design and economic evaluation",
abstract = "A two-step approach to hydrothermal gasification of carbohydrate-rich wastes and wastewaters is a promising route for H2 production and simultaneously as a water clean-up technology. Experimental data and kinetic models are used to further develop the process for industrial scale. In this work, a preliminary process design is conducted in order to assess the market potential of the two-step process. For stabilisation, two cases are considered: the use of excess vs. stoichiometric H2, and for gasification, the utilisation of sequential reactors for gasification housing Pt and Ru catalysts is compared to a single reactor with Pt alone. A total of four options are conceptually designed and economically evaluated. Using state-of-the-art insights and process techniques and the current market scenario, a minimum H2 selling price of 3.4 $ kg−1 was obtained. A sensitivity study showed that the feedstock price, concentration and quantity, played a crucial role in the selling price of H2. These variables are all correlated and are dependent on the industry from where the feedstock is obtained. Industrial wastewater streams rich in carbohydrate residues and associated with gate fees were found to be promising feedstock for the process. Further advancement in the areas of catalyst development (hydrothermal stability, affordability) as well as increased H2 yields are necessary in order to improve the economics of this process on industrial scale.",
keywords = "Economics, Gasification, Hydrogen, Process design, Wastewater",
author = "Paida, {V. R.} and Kersten, {S. R.A.} and {van der Ham}, {A. G.J.} and Brilman, {D. W.F.}",
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A two-step approach to the hydrothermal gasification of carbohydrate-rich wastes : Process design and economic evaluation. / Paida, V. R.; Kersten, S. R.A.; van der Ham, A. G.J.; Brilman, D. W.F.

In: International journal of hydrogen energy, Vol. 44, No. 47, 04.10.2019, p. 25524-25541.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - A two-step approach to the hydrothermal gasification of carbohydrate-rich wastes

T2 - Process design and economic evaluation

AU - Paida, V. R.

AU - Kersten, S. R.A.

AU - van der Ham, A. G.J.

AU - Brilman, D. W.F.

PY - 2019/10/4

Y1 - 2019/10/4

N2 - A two-step approach to hydrothermal gasification of carbohydrate-rich wastes and wastewaters is a promising route for H2 production and simultaneously as a water clean-up technology. Experimental data and kinetic models are used to further develop the process for industrial scale. In this work, a preliminary process design is conducted in order to assess the market potential of the two-step process. For stabilisation, two cases are considered: the use of excess vs. stoichiometric H2, and for gasification, the utilisation of sequential reactors for gasification housing Pt and Ru catalysts is compared to a single reactor with Pt alone. A total of four options are conceptually designed and economically evaluated. Using state-of-the-art insights and process techniques and the current market scenario, a minimum H2 selling price of 3.4 $ kg−1 was obtained. A sensitivity study showed that the feedstock price, concentration and quantity, played a crucial role in the selling price of H2. These variables are all correlated and are dependent on the industry from where the feedstock is obtained. Industrial wastewater streams rich in carbohydrate residues and associated with gate fees were found to be promising feedstock for the process. Further advancement in the areas of catalyst development (hydrothermal stability, affordability) as well as increased H2 yields are necessary in order to improve the economics of this process on industrial scale.

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KW - Hydrogen

KW - Process design

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