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|Title:||High quality syngas production with supercritical biomass gasification integrated with a water–gas shift reactor|
|Citation:||Energies, 2019; 12(13):2591-1-2591-14|
|M.M. Sarafraz, Mohammad Reza Safaei, M. Jafarian, Marjan Goodarzi, and M. Arjomandi|
|Abstract:||A thermodynamic assessment is conducted for a new configuration of a supercritical water gasification plant with a water–gas shift reactor. The proposed configuration offers the potential for the production of syngas at different H₂:CO ratios for various applications such as the Fischer–Tropsch process or fuel cells, and it is a path for addressing the common challenges associated with conventional gasification plants such as nitrogen dilution and ash separation. The proposed concept consists of two reactors, R₁ and R₂, where the carbon containing fuel is gasified (in reactor R₁) and in reactor R₂, the quality of the syngas (H₂:CO ratio) is substantially improved. Reactor R₁ is a supercritical water gasifier and reactor R₂ is a water–gas shift reactor. The proposed concept was modelled using the Gibbs minimization method with HSC chemistry software. Our results show that the supercritical water to fuel ratio (SCW/C) is a key parameter for determining the quality of syngas (molar ratio of H₂:CO) and the carbon conversion reaches 100%, when the SWC/C ratio ranges between two and 2.5 at 500–1000 °C.|
|Keywords:||Supercritical water gasification; water–gas shift reactor; biomass gasification; syngas quality|
|Rights:||© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).|
|Appears in Collections:||Mechanical Engineering publications|
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