Comparative Techno-Economic and Exergetic Analysis of Circulating and Dual Bed Biomass Gasification Systems

Author(s)

Ortiz, Pablo Silva ; Maier, Simon ; Dietrich, Ralph-Uwe ; Pinto Mariano, Adriano ; Maciel Filho, Rubens ; Posada, John

• Document type: Journal article
• Source: FRONTIERS IN CHEMICAL ENGINEERING; v. 3, p. 12-pg., 2021-10-08.

Abstract

In this work, the techno-economic and exergy analyses of two gasification technologies with integration into heat and power combined cycles are presented: i). Circulating fluidized bed (CFB) and ii). Dual fluidized bed (DFB) systems. As feedstock, lignocellulosic biomass (sugarcane bagasse, SCB) was considered. The gasification process of the fluidized-bed systems (circulating and dual bed) and the syngas conversion were performed using Aspen Plus((R)) software. The process design includes biomass drying and gasification, syngas cleaning, combustion, power generation, and heat recovery. The SCB-DFB system has the lowest irreversibility rate and, as a result, the highest overall performance and power generation (achieving 32% in the gasification system and 53% of exergy efficiency when coupled with the combined cycle). From the techno-economic assessment, the SCB-DFB system has the lowest total production costs per unit of energy. Hence, the dual fluidized bed systems could be a more competitive technology for the agro-industrial sector to generate power from lignocellulosic materials. (AU)

• FAPESP's process: 17/03091-8 - Techno-economic and environmental assessment of biorefinery technologies
• Grantee: Pablo Andrés Silva Ortiz
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/16106-3 - Techno-economic and environmental assessment of biorefinery technologies
• Grantee: Pablo Andrés Silva Ortiz
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity
• Grantee: Rubens Maciel Filho
• Support Opportunities: Research Projects - Thematic Grants