Abstract
A two-step synthesis of acetamide under hydrothermal condition from microalgae, is presented. results showed that the best yield of acetamide and selectivity of acetic acid were 9.5 % and 60.1 % at 320 ℃ for 8 min with a NH3 supply of 30. Algae such as spirulina, cyanobacteria and autotrophic chlorella could also acquire acetamide, and lactic acid was found to be an important intermediate during the exploration of reaction pathways. These results demonstrated that it is possible to develop a process for conversion of microalgae biomass into acetamide.
Highlights
Diminishing fossil fuel reserves and ever-increasing CO2 concentration have prompted the exploration for an alternate renewable and sustainable energy source [1]
It was evident that acetamide was formed after the second-step reaction due to the peak
To explore whether there were other substances produced during the second-step reaction, we compared the products of the acetic acid sample and ammonia at 300 ° C and 500% NH3 supply for 1 minute and 2 minutes
Summary
Diminishing fossil fuel reserves and ever-increasing CO2 (carbon dioxide) concentration have prompted the exploration for an alternate renewable and sustainable energy source [1]. Microalgae are thought to be a candidate for future fuel. Microalgae is a promising feedstock for advanced biofuels production owing to many compelling reasons [2], such as faster growth rate [3, 4], shorter multiplication cycle [5, 6], higher photosynthetic efficiency [3, 4] and maximum productivity [5, 6]. Microalgae can be cultivated in saline and alkaline land or wastewater, and it is a good way to preserve conventional cropland and remove nitrogen, phosphorus, and heavy metals in wastewater [2]. Microalgae has the excellent ability to capture CO2 for itself growth and can be converted into non-toxic and degradable biodiesel, which relieve environmental problems [7, 8]
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