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By aggregating data from 63 research papers on dilute acid pretreatment of lignocellulosic biomass, we were able to critically analyse its main parameters of time, temperature and acid level. The majority of the literature uses residence times of less than 30 min, temperature ranges of 100 °C to 200 °C and acid levels between 0% and 2%. Statistical analyses allowed us to quantify the time-temperature equivalence for three types of biomass: Forestry, Agricultural and Industrial by non-linear expressions.

We were also able to isolate areas of study to be avoided or favoured in further work, and put in place methodological recommendations to promote the development of an open, findable, accessible, interoperable and reusable data approach for pretreatment research. As a priority, pretreatment equipment (time-temperature kinetics, reactor type) and analytical methods need to be standardised and better described.

This work is part of Julien du Pasquier's doctoral thesis, carried out between the UMR FARE and the CentraleSupélec Biotechnology Chair, with funding from the Grand Reims area and CentraleSupélec.

Read: du Pasquier J, Paës G*, Perré P. Principal factors affecting the yield of dilute acid pretreatment of lignocellulosic biomass: A critical review. Bioresource Technology 2023, 369, 128439. https://doi.org/10.1016/j.biortech.2022.128439

Contact: Dr Gabriel Paës, gabriel.paes@inrae.fr