One-step peracetic acid pretreatment of hardwood and softwood biomass for platform chemicals production

Abstract

Lignocellulosic biomass is an attractive renewable resource to produce biofuel or platform chemicals. Efficient and cost-effective conversion systems of lignocellulosic biomass depend on their appropriate pretreatment processes. Alkali or dilute acid pretreatment of biomass requires a high temperature (> 150 °C) to remove xylan (hemicellulosic sugar) and lignin partially. In this study, peracetic acid was used to pretreat biomass feedstocks, including hardwood and softwood species. It was found that the thermally-assisted dilute acid pretreatment of biomass conducted under the mild temperature of 90 °C up to 5 h resulted in the effective removal of lignin from the biomass with a negligible loss of carbohydrates. This thermally-assisted pretreatment achieved 90% of delignification, and this result was compared with the microwave-assisted pretreatment method. In addition, the crystallinity index (CrI), surface morphology, and chemical structure were significantly changed after the acid pretreatment. The biomass digestibility increased significantly with increased reaction time, by 32% and 23% for hardwood and softwood, respectively. From this study, it is clear that peracetic acid pretreatment is an effective method to enrich glucan content in biomass by delignification.

Acid modification of lignocellulosic derived material for dye and heavy metals removal: A review

“…Organic acids have, over time, proven effective in achieving the delignification of the LDM. For instance, 90% of delignification was achieved when Eucalyptus spp was treated with peracetic acid at 90℃ within 5 h [36]. Similarly, when Zhou et al [33] treated wheat straw with formic at the temperature of 130℃ for 15 min.…”

“…Modification is a process that reduces or eliminates impurities or undesired chemicals in the raw material that will be used to make a product [54]. Modification is required to destroy the lignin-hemicellulose connection and damage the crystalline structure of cellulose [36]. Thus, improving the structure such as the porosity, surface area, etc.…”

Comparative Study on the Various Hydrolysis and Fermentation Methods of Chlorella vulgaris Biomass for the Production of Bioethanol

“…From the study by Offei et al (2018), it is known that several studies on bioethanol production using microalgae with both acid and alkaline-catalyzed hydrolysis have been previously conducted. The hydrolysis using acid catalysts at high temperatures has been shown to be faster than alkaline catalysts (Kundu et al, 2021). As denounced in the available literature, sulfuric acid is capable of hydrolyzing carbohydrates in Gracilaria birdiae into 28.56 g/L of glucose (Albuquerque et al, 2021), and hydrolysis with a sulfuric acid catalyst in Scenedesmus sp.…”

The Technical and Economic Feasibility for the Production of Cellulose from Non-Wood – Agricultural Residues

“…The advantage of the method of obtaining cellulose by delignification with peracetic acid is that during the cooking process, acetyl groups are simultaneously split off as a result of hemicellulose hydrolysis. Thus, the formation of acetic acid takes pace (Kundu et al, 2021). There is no formation of methanol, as in the case of traditional methods of delignification.…”