9 research outputs found
High production of fatty alcohols in Escherichia coli with fatty acid starvation
Background: Microbial biofuel synthesis attracting increasing attention. Great advances have been made in producing fatty alcohols from fatty acyl-CoAs and fatty acids in Escherichia coli. However, the low titers and limited knowledge regarding the basic characteristics of fatty alcohols, such as location and toxicity, have hampered large-scale industrialization. Further research is still needed.</p
Direct Production of Lower Olefins from CO<sub>2</sub> Conversion via Bifunctional Catalysis
Direct
conversion of carbon dioxide (CO<sub>2</sub>) into lower
olefins (C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup>), generally referring to ethylene, propylene, and butylene, is highly
attractive as a sustainable production route for its great significance
in greenhouse gas control and fossil fuel substitution, but such a
route always tends to be low in selectivity toward olefins. Here we
present a bifunctional catalysis process that offers C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup> selectivity as high
as 80% and C<sub>2</sub>–C<sub>4</sub> selectivity around 93%
at more than 35% CO<sub>2</sub> conversion. This is achieved by a
bifunctional catalyst composed of indium–zirconium composite
oxide and SAPO-34 zeolite, which is responsible for CO<sub>2</sub> activation and selective C–C coupling, respectively. We demonstrate
that both the precise control of oxygen vacancies on the oxide surface
and the integration manner of the components are crucial in the direct
production of lower olefins from CO<sub>2</sub> hydrogenation. No
obvious deactivation is observed over 150 h, indicating a promising
potential for industrial application