Co‐Production of Bio‐Ethanol and Bio‐Oil from Different Species of Macroalgae

Abstract

This paper proposed a methodology to realize the co‐production of bio‐ethanol and bio‐oil from macroalgae. Bio‐ethanol were obtained from three different species of macroalgae (Enteromorpha prolifera, Undaria pinnatifida and Gelidium amansii) by hydrolysis and fermentation. And then the residues after hydrolysis were converted into bio‐oil with high heating value via deoxy‐liquefaction. The yield of reducing sugar and bio‐ethanol from three macroalgae were calculated. The red algae (Gelidium amansii) produced the reducing sugar with largest yield of 320±4.1 mg/g and ethanol with a maximum content of 9.09±0.07 g/L. Besides, the properties and components of the liquid oils have been analyzed and compared with each other. The lower oxygen content (4.47 %, 4.98 % and 4.02 %) and higher heating value (45.06, 44.53 and 45.12 MJ/kg) of the liquid oils were detected respectively. The results indicated that macroalgae had a great potential for co‐production of bio‐ethanol and high‐quality bio‐oil.

Rapid Estimation of Ethanol Concentration using Acousto‐Optic Diffraction

“…[9][10][11][12] Other than microbial fermentation of carbohydrates, ethanol could also be synthesized through several other commercially promising routes such as electrochemical reduction of CO 2 , [13,14] electrochemical conversions facilitated by copper nanoparticle and graphene composite electrodes [15] and use of different species of macroalgae. [16] In a bid to reduce collective carbon footprint, ethanol is being currently considered as the most promising alternative and sustainable energy resource, [17][18][19] which necessarily demands inexpensive and rapid quality monitoring protocol. Other than industries, ethanol also finds several important applications in chemistry and biology, where accurate determination of its concentration is essential.…”

“…It also finds important usage in sustainable energy production endeavors due to its easy production, transportation, and storage features, compared to other potential green energy resources [9–12] . Other than microbial fermentation of carbohydrates, ethanol could also be synthesized through several other commercially promising routes such as electrochemical reduction of CO 2 , [13,14] electrochemical conversions facilitated by copper nanoparticle and graphene composite electrodes [15] and use of different species of macroalgae [16] . In a bid to reduce collective carbon footprint, ethanol is being currently considered as the most promising alternative and sustainable energy resource, [17–19] which necessarily demands inexpensive and rapid quality monitoring protocol.…”

Thermal and Catalytic Pyrolysis Process of Neem Seed to Produce Valuable Fuels over RFCC Catalyst: Process Development and Evaluation

“…[12][13][14] Biomass can be converted to fuel through thermochemical processes such as combustion, gasification and pyrolysis. [15][16][17] Biomass can be transformed into liquid fuels by pyrolysis happening at temperatures between 350 to 550 °C in absence of oxygen and diversity operating condition. Belonging on the heating rate, residence time and temperature, pyrolysis can be divided into slow pyrolysis, fast pyrolysis and flash pyrolysis.…”

Life cycle impact assessment of biofuels derived from sweet sorghum in the U.S.

“…No studies were found in the literature that also investigate the environmental impacts of co-producing sorghum bagasse liquid biofuels. Some studies in the literature have investigated co-production of sugar-based biofuels and lignocellulosic biofuels in the same biorefinery, including biofuels from wheat straw [36] and macroalgae [26]. In co-producing bioethanol and bio-oil from wheat straw, biofuel mass and energy yields nearly doubled compared to biofuels produced solely from bioethanol production [36].…”