But it is of low quality, with a high ash content and low calorific value.
The high ash content of this biochar downplays the quality of the carbon present, hence the low rating.
For type III, high ash content greatly reduces the adsorption and seepage capacity of coal.
Kuznetsk Basin coal is generally of high quality, with less than 1percentt sulfur but sometimes with a rather high ash content, necessitating pithead enrichment.
Other issues were clinker formation, bridging or channel burning, erosion and corrosion due to high ash content of lignite, etc.
The utilization of rice husks for energy production is often problematic due to their high ash content.
A theory is proposed to describe the combustion of coke with high ash content in fluidised beds of sand.
The high ash content and varying ash composition in algal biomass is often mentioned as problematic if to be used for thermal energy conversion.
Biomass material with low ash and hydrogen contents between 5% and 7% were used for blending with coal with high ash content (32%) and low hydrogen content (3%).
However, the MBSP values are higher than literature references for butanol derived from cellulosic feedstock primarily due to the high ash content in seaweed.
Accurate prediction of percentage unburnt carbon in fly ash in the case of high ash content Indian coal, at the design stage, is generally difficult.
