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Analysis of Process Liquids
analysis of process liquids


Backgroud


Many of the various technologies that exist for the production of advanced biofuels produce liquid outputs, either from the primary conversion process or from the pre-treatment stage. At Celignis we offer a number of analysis packages to characterise these liquids.

We also have dedicated analysis packages to determine the composition of the bio-oil liquid output from pyrolysis, please click here for more detail on bio-oil analysis.


Analysis of Liquids from Pre-treatment Processes


Hydrolysis conversion processes often involve a pre-treatment stage to break apart the lignocellulosic matrix so that the solid that results is more amenable to the subsequent hydrolysis stage. Various types of pre-treatments exist and many of these, such as those involving dilute acids, alkalis, and other solvents, result in a liquid output that contains a significant proportion of the original biomass. Accurate characterisation of this liquid output is important since it can help to understand the efficiency and mechanisms of the pre-treatment process and allow for improvements or refinements to be made.

For example, many pre-treatment processes focus on the hydrolysis of hemicellulose from biomass and on the subsequent valorisation of these liberated sugars. Whilst analysis of the solid residue from pre-treatment would tell us the amount of hemicellulose removed from the sample it would not tell us the fate of this constituent in the liquid. Given that hemicellulose contributes a significant proportion towards the total mass of many biomass feedstocks, it is of major commercial importance that it is valorised as efficiently as possible.

The hemicellulosic sugars will most likely be present in a number of different forms in the liquid output from pre-treatment: