Optimization of zero-waste hydrogen peroxide-Acetic acid pretreatment for sequential ethanol and methane production

Basar I. A., PERENDECİ N. A.

ENERGY, cilt.225, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 225
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.energy.2021.120324
  • Dergi Adı: ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Computer & Applied Sciences, Environment Index, INSPEC, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Ethanol, Methane, Pretreatment, Hydrogen peroxide, Acetic acid, Optimization, Switchgrass, Biofuel, BIOETHANOL PRODUCTION, CORN STOVER, SACCHAROMYCES-CEREVISIAE, LIGNOCELLULOSIC BIOMASS, CHEMICAL-COMPOSITION, WHEAT-STRAW, SWITCHGRASS, HYDROLYSIS, BIOFUEL, YIELD
  • Akdeniz Üniversitesi Adresli: Evet

Özet

In this study, the development of an environmentally friendly version of hydrogen peroxide - acetic acid (HPAC) pretreatment was investigated and optimized with two different approaches as maximum bio-fuel production optimization and cost optimization. Central composite design and response surface method were used for the experimental design and data analysis, respectively. In the experimental design, investigated HPAC pretreatment parameters were 50-100 degrees C reaction temperature, 6-24 h reaction time, 0-2 wt% HAc and 0-2 wt% H2O2. Significant ethanol production enhancement was observed only for the samples pretreated at 100 degrees C. This increase was due to the enhanced enzyme accessibility by the surface area increment and delignification, which were also revealed in SEM imaging and FTIR analysis. Maximum ethanol production was observed in 2% H2O2, 0% HAc, 24 h, and 100 degrees C pretreatment conditions as 81.65 mg EtOH/g total solid (TS) (103.49 L EtOH/tonne TS), corresponding 49.55% of the theoretical ethanol yield. Maximum methane production, on the other hand, was observed in 2% HAc, 0% H2O2, 100 degrees C, 6 h conditions as 363.82 mL CH4/g VS. In terms of net energy production, cost optimum pretreatment (1.87% HAc, 0% H2O2, 50 degrees C, and 6 h) was found be the most beneficial condition with 67.5% energy recovery. (C) 2021 Elsevier Ltd. All rights reserved.