Techno-economic analysis of different pretreatment processes for lignocellulosic-based bioethanol production

Economic Analysis of Cellulosic Ethanol Production from Sugarcane Bagasse Using a Sequential Deacetylation, Hot Water and Disk-Refining Pretreatment

“…However, the pretreatment operating conditions play an important role in determining production cost, especially utility cost. As reported by da Silva (2016) the total energy usage of LHW pretreatment increased from 232.3 to 393.6 MW when pretreatment solids loading (SL) decreased from 20% to 13% [10]. Heat accounts for over 70% of the total energy requirement in the LHW process because high temperatures are required to achieve targeted sugar yields.…”

Technoeconomic Assessment of Hybrid Organosolv–Steam Explosion Pretreatment of Woody Biomass

“…The MESP showed high sensitivity to uncertainties in capital investment and discount rates and to a lesser degree to variations in feedstock cost and lignin price. Previous studies, e.g., References [9,10,20,25], have shown that the TFCI and discount rates lean towards the favorable end of the range considered in the sensitivity investigations ( Figure 4). For woody biomass feedstock, the price 50 €/ton dry is rather low unless the biorefinery is located near or integrated at a forest industry site where the woodchips or sawdust can be acquired onsite avoiding logistics and transportation expenses.…”

“…The thermo-chemical path essentially involves high-temperature conversion step, such as gasification, e.g., References [1,2], pyrolysis, e.g., References [3][4][5], and hydrothermal liquefaction, e.g., References [6,7], which often are followed by chemical synthesis step to reach the desired final products. The biochemical route is rather based on fractionation of the feedstock under mild conditions to produce cellulosic materials, biofuels and chemicals, e.g., References [8][9][10][11][12][13]. Such a process falls well within the biorefinery concept, which effectively simulates a traditional refinery, in which all the major components of biomass are converted to different products and energy.…”

“…To emphasize the performance of novel process step for converting biomass, systemic mapping of a value chain utilizing the service of the technology in a biorefinery setup is relevant. Such assessment also enables comparison to other pathways of achieving the same service, for example many variants of pretreating lignocellulosic biomass are available such as organosolv, diluted acid, hot water, ammonia fiber explosion [10,19]. This study is motivated by the experimental outcomes of a hybrid organic solvent-steam explosion fractionation of lignocellulosic biomass to a cellulose-rich, a hemicellulose-rich and lignin streams, and aims to investigate the performance of this novel technique in a biorefinery setup.…”

Second-Generation Bioethanol from Coconut Husk

“…The three main components of a biomass (cellulose, hemicellulose, and lignin) form a recalcitrant structure, making it difficult for enzymes to have complete access to cellulose for conversion to monosaccharides. To make this feasible, the first major step in bioethanol production is biomass pretreatment (biological, physical or chemical), in which the lignin content is reduced to release the fermentable sugars from the rigid structure and, therefore, prepare the biomass for enzymatic conversion [ 19 ]. Different types of biomasses have different amounts and types of sugars (hemicellulose and cellulose) and lignin, so knowing its composition is crucial for the process.…”