I think by mixing it with lime

Thanks Nourhan

You could easily do so by adding additives to the biomass like  silicates. For example adding potassium aluminum silicates  (e.g., KAlSiO4, KAlSi2O6, KAlSi3O8, etc.) will result in high melting-points (>1100 °C).

Here is nice paper for you on this subject:

file:///C:/Users/khali/AppData/Local/Microsoft/Windows/INetCache/IE/EE50TYGR/energies-05-05171-v2.pdf

Hope this helps answer your question.

Professor Yehia Khalil

Yale University

USA

Thanks professor yehia

Is there is any chance of clinker formation during combustion of biomass with KALSIO4? 

Thanks

Ahmed 

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.875.373&rep=rep1&type=pdf

Conference Paper Additives application to wheat straw to increasing the ash f...