Overview
![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
ABSTRACT
Biomass valorization is at the heart of the questions concerning energetic resources in the twenty-first century. Regarding humid biomass, gasification in supercritical water is an interesting valorization process as it allows for the production of a valuable energetic gas due to its non-fossil origin. Gasification in supercritical water concerns more specifically very humid biomass. The influence of the principal operating conditions on the nature and conversion yield of this process are detailed and the most important laboratory pilots are presented.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHORS
-
Olivier BOUTIN: Engineer, École Nationale Supérieure des Industries Chimiques, Doctor of Process Engineering - Research engineer at the French Atomic Energy and Alternative Energies Commission (CEA Marcoule)
-
Jean-Christophe RUIZ: Research engineer at the French Atomic Energy and Alternative Energies Commission (CEA Marcoule) - Head of the Supercritical Water project in the Supercritical Processes and Decontamination Laboratory.
INTRODUCTION
The use of biomass is at the heart of questions about energy resources in the 21st century. xxi e century. It is one of the major challenges. The term biomass has a wide range of meanings, from noble biomass destined for food use, such as cereals, to biomass that can be assimilated to waste, such as vinasse from beet production or biological sludge from wastewater treatment plants. In the case of wet biomass, one recovery process of interest is supercritical water gasification. This process avoids the need for a drying stage and, given the right pressure and temperature conditions, produces an energy gas that can contain hydrogen, methane, carbon monoxide and/or light hydrocarbons. The interest aroused by this process is therefore part of the global issue of access to non-fossil energy sources, as well as the issue of greenhouse gases, since the use of biomass is part of a short carbon cycle. Supercritical water gasification is particularly suited to very moist biomass (over 70% moisture content), which does not need to be dried beforehand. Reaction temperatures are relatively low (maximum 700°C), compared with conventional or dry gasification processes (typically 900°C). This limits the production of polluting gases, such as dioxins or NO x . Similarly, the aqueous solvating medium limits the formation of solids and tars. The gases targeted are mainly hydrogen, but also a mixture of hydrogen and carbon monoxide (mixture for Fisher Tropsch synthesis), or methane production. The influence of the main operating conditions on the nature and yields of conversion will be detailed in this article (pressure, temperature, initial biomass concentration, presence or absence of catalysts). As industrial development of this process has not yet taken place, the most important laboratory pilots (up to 100 kg.h- 1 ) will be presented.
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
CAN BE ALSO FOUND IN:
Home Environment - Safety Environment Biomass gasification in supercritical water
Home Food–Chem–Bio industry processes Unit operations. Chemical reaction engineering Biomass gasification in supercritical water
Home Food–Chem–Bio industry processes Green chemistry Biomass gasification in supercritical water
Home Power and energy Energy resources and storage Biomass gasification in supercritical water
This article is included in
Bioprocesses and bioproductions
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Biomass gasification in supercritical water
Bibliography
Organizations – Federations – Associations
Association Innovation Fluides Supercritiques IFS
http://wikini.supercriticalfluid.org
Association International Society for Advancement of Supercritical Fluids ISASF
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference