System Hydrodynamics of a 1 MW th Dual Circulating Fluidized Bed Chemical Looping Gasifier

Paul Dieringer (), Falko Marx, Jochen Ströhle () and Bernd Epple
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Paul Dieringer: Institute for Energy Systems and Technology, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany
Falko Marx: Institute for Energy Systems and Technology, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany
Jochen Ströhle: Institute for Energy Systems and Technology, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany
Bernd Epple: Institute for Energy Systems and Technology, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany

Energies, 2023, vol. 16, issue 15, 1-46

Abstract: Chemical looping gasification (CLG) is a novel dual-fluidized bed gasification technology that allows for the production of high-calorific syngas from various solid feedstocks (e.g., biomass). Solid circulation between the two coupled fluidized bed reactors, serving the purpose of heat and oxygen transport, is a key parameter for the CLG technology, making system hydrodynamics the backbone of the gasification process. This study serves the purpose to provide holistic insights into the hydrodynamic behavior of the dual-fluidized bed reactor system. Here, special focus is placed on the operational principles of the setup as well as the entrainment from the circulating fluidized bed (CFB) reactors, the latter being the driving force for the solid circulation inside the entire reactor system. Using an elaborate dataset of over 130 operating periods from a cold flow model and 70 operating periods from a 1 MW th CLG pilot plant, a holistic set of ground rules for the operation of the reactor setup is presented. Moreover, a novel easily-applicable approach, solely relying on readily-available live data, is presented and validated using data from the 1 MW th chemical looping gasifier. Thereby, a straightforward estimation of solid entrainment from any CFB setup is facilitated, thus closing a crucial research gap.

Keywords: chemical looping; gasification; hydrodynamics; pilot scale; circulating fluidized bed; dual fluidized bed; cold flow model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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