Langsung ke konten utama

Focus on Biomass Ash

Utilization of biomass with thermal route which is combustion and gasification will be generated ash residue. While the pyrolysis due to work at low temperatures (400-600 C) and without oxygen / air then there is no ash. Minerals contained in the biomass will remain behind in the form of charcoal products in the pyrolysis process. Ash content and ash chemistry greatly affects the utilization of biomass in addition to heating value, particle size and moisture content. In general characterization of ash from biomass is described by Bryers as follows:

1.     High  silica (Si) and potassium (K) ash content  while the calcium (Ca) is low, with low fusion temperature derived from the group of agricultural biomass wastes.

2.     Low silica (Si) and potassium (K) ash content while calcium (Ca) is high, with a high fusion temperature derived from a group of nearly all the woody biomass. Specifications are best for combustion and gasification.

3.     High potassium (K) and phosphorus ash content, with low fusion temperature derived from faecal matter such as poultry and cattle dung.

Biomass Ash Content
The ash content of various types of biomass indicate slagging behavior.  In general, the higher ash content, the greater the tendency of its slagging behavior. But this does not mean that low ash slagging not show the phenomenon.  Operating temperature, ash chemistry and ash content are variables the occurrence of slagging. If conditions favor the slagging will be even greater. Minerals such as SiO2, Na2O and K2O more tendency toward the occurrence of slagging. Usually slagging occurs in biomass with ash content of more than 4% and non-slagging fuel with ash content less than 4%. According to the composition of the melt, fuel-biomass fuels are grouped into severe or moderate slagging.

Biomass Ash Chemistry 
Issues arising from these ashes is clogging the air intake holes or slagging that will reduce the thermal efficiency of the gasification and combustion process related air supply and biomass distribution in the process unit.
Ash Slagging

So before processing the biomass waste, consider and note the ash content and its chemistry so that it can deliver optimum results.


Postingan populer dari blog ini

Carbon Positive, Carbon Carbon Neutral or Negative?

Greenhouse gases from burning fossilfuels have caused the Earth's temperature to rise. Increasing the temperature of the earth or global warming causing numerous disasters due to climate change in a number of places on earth. When greenhouse gases not controlled then the result of damage to the environment of the earth will be more severe. Therefore, efforts were made to reduce greenhouse gases as the cause of environmental problems. In general, there are four common scenarios to prevent the global warming effect of CO2 in the atmosphere gradually, namely: 1.increasing the efficiency so the fossil fuel consumption decreases, 2.mix of renewable fuels with fossil fuels so that fossil fuel consumption has also decreased, 3.substitution of fossil fuels with renewable fuels 4.and the absorption of CO2 in the atmosphere so that the concentration of greenhouse gases can be reduced. Here are some basic terms related to the above problems. Based on the origin and the effect that CO2 in the atmo…

10 Advantages By Making Energy Plantations for Wood Pellet Production

Assuredness of supply of raw materials is one of the key factors of business success in the wood pellets. There are two ways to obtain raw materials commonly done today: a. Buying from the owner of source of raw materials. b. Producing its own the availability of raw materials. While the 3rd way and there is still few for business owners make wood pellets is by mix way, which is partly provide by their own of raw materials and some rest buy from the other source of raw materials.
While examining at the types of biomass raw materials there are two kinds, namely : a. Woody biomass b. Non-wood biomass such as agricultural wastes (empty fruit bunches of palm oil trees, corn cobs, rice husks and so on). Currently woody biomass remains a priority to be products of wood pellets as a number of advantages over non-wood biomass which is generally an agricultural wastes, are included in the category of biomass pellets or agri-waste pellets. The comparison between wood pellet and biomass pellet …

Activated Carbon Production From Coconut Shell and Palm Kernel Shell