کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1276594 | 1497561 | 2012 | 9 صفحه PDF | دانلود رایگان |
The imminent use of hydrogen as an energy vector establishes the need for sustainable production technologies based on renewable resources. Starch is an abundant renewable resource suitable for bio-hydrogen generation. It was hypothesised that starch hydrolysates from a large (250 mL) hydrothermal reactor could support bioH2 fermentation without inhibition by toxic byproducts.Starch was hydrolysed at high concentrations (40–200 g L−1) in hot compressed water (HCW) with CO2 at 30 bar in a 250 mL reactor, the largest so far for polysaccharide hydrolysis, at 180–235 °C, 15 min. Hydrolysates were detoxified with activated carbon (AC) and tested in biohydrogen fermentations. The maximum yield of glucose was 548 g kg starch−1 carbon at 200 °C. 5-hydroxymethyl furfural, the main fermentation inhibitor, was removed by AC to support 70% more hydrogen production than the untreated hydrolysates. The potential utilization of starch hydrolysates from HCW treatment for upscaled fermentations is promising.
► Starch was hydrolysed in hot compressed water supplemented with CO2.
► CO2 enhanced sugar generation from starch but also increased levels of toxic 5-HMF.
► Activated carbon removed 5-HMF from hydrolysates without affecting sugars.
► Detoxified hydrolysates made more H2 in fermentation with Escherichia coli HD701.
► Study of the larger, scalable reactor moves towards practical hydrolysis in HCW/CO2.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 8, April 2012, Pages 6545–6553