Gasification technology

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Gasification is a process that converts organic matter into fuel gas.
In gasification, unlike incineration, the amount of oxygen present during the process is limited, i.e., just 25-30% of oxygen is needed to complete the combustion of organic matter, which gives rise to many environmental advantages.
Moreover, during gasification the chemical energy stored in organic matter is turned into chemical energy contained in a gas. Said gas can be used as fuel to obtain energy for engines, gas turbines or boilers. Ashes may either be treated as waste or used as fertilizer or material for the building and glass industries, among other uses.
Gasification is an efficient technique to reduce solid waste volume and recover energy from such waste, thus becoming, within the framework of sustainable development, the most appropriate way to produce electricity and thermal energy.
A wide variety of materials containing carbon, such as coal, biomass, organic and carbonaceous waste, can be gasified.
The resulting gas contains carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), methane (CH4), small amounts of other heavier hydrocarbons, water (H2O), nitrogen (N2) when using air as a gasifying agent, and various pollutants such as fine carbonaceous particles, ashes, tars and oils.
Gasification occurs in a number of sequential steps:
Partial combustion supplies the energy required to perform the rest of the processes, which are endothermic. It is important to control the fuel/oxidising agent ratio to ensure that the heat generated throughout the exothermic process is equal to that invested in the endothermic processes, thereby maintaining a thermal balance called autothermal.
Organic matter combusts in the presence of oxygen. As the oxygen concentration in the reactor is limited, CO is then produced through incomplete combustion. The excess of organic material reacts with the gases present, mainly with CO2 and H2O. The presence of steam favours the production of H2. Furthermore, methane production is caused by high pressures.
Biomass gasification
There are various types of biomass:
-Energy crops
-Biomass from forestry pruning
-Biomass from farms
In order to use these materials in energy recovery processes through gasification, they must be shredded into 5-cm chips with no more than 20% moisture content.
GreenE gasification technology:
-Rotating kiln for any type of organic waste.?
-State-of-the-art syngas cleaning system (zero tars).?
-Ash removal system able to process high contents of ash (>10%).?
-Easy maintenance filtering system. Wastewater-free.?
-High quality and long durability: designed to perform for 25 years at high temperatures.?
-Ongoing gas analyser.?
-Control of 6 different areas throughout the whole gasification process.

 

During processing, both power and thermal energy are obtained. The latter can be used for:
-Heating systems
-Drying of biomass itself
-Several industrial processes
-Increasing electrical efficiency by means of an organic rankine cycle (ORC) system

Benefits
Profitability
Maximum process efficiency.
Minimum investment per kW installed
Plants profitable from 0.2 MW

Energy

 

Obtainment of syngas, which can be processed into usable power and heat.
Waste disposal
Disposal of more than 80% of organic matter, leaving inert waste (ash).
Experience
A development team made up of engineers and chemists who have developed this cutting-edge process over the last eight years.
Pilot plants
Plants under construction
Advanced studies