Techno-economic analysis and climate change impacts of sugarcane biorefineries considering different time horizons

摘要: Ethanol production from lignocellulosic feedstocks (also known as 2nd generation or 2G ethanol process) presents a great potential for reducing both costs and climate change impacts since agricultural residues dedicated energy crops are used feedstock. This study aimed at the quantification of economic environmental considering current future scenarios sugarcane biorefineries taking into account not only improvements industrial process but also biomass systems. Technology assumptions setup were supported by main companies stakeholders, involved in chain Brazil abroad. For instance, considered higher efficiencies lower residence times pretreatment, enzymatic hydrolysis, fermentation (including pentoses fermentation); yields; introduction cane (a high fiber variety cane). estimated different time horizons. In short term, compared to 1st (1G) ethanol. However, long is more competitive, presenting remarkable cost than 1G ethanol, even some uncertainties regarding technology market aspects. addition, assessment showed that (in medium term) can reduce 80% when gasoline. work terms These results support new research programs public policies designed stimulate consumption Brazil, accelerating path along learning curve. Some examples mechanisms include: incentives establishment local equipment enzyme suppliers; specific funding development use cane.