KCoMoS2 was supported on various carbon support materials to study the support effect on synthesis gas conversion. Next to two activated carbons with high micropore volume, a traditional alumina (γ-Al2O3) support and its carbon coated form (CCA) were studied for comparison. Coating alumina with carbon increases the selectivity to alcohols, but the AC-supported catalysts show even higher alcohol selectivities and yields, especially at higher temperatures where the conversions over the AC-supported catalysts increase more than those over the γ-Al2O3-based catalysts. Increasing acidity leads to decreased CO conversion yield of alcohols. The two activated-carbon-supported catalysts give the highest yield of ethanol at the highest conversion studied, which seems to be due to increased KCoMoS2 stacking and possibly to the presence of micropores and low amount of mesopores.
This review article presents the authors' view of the role and place of active (activated) carbon (AC) in solving various environmental problems ranging from protecting the environment from harmful industrial emissions to endoecology -the internal ecological purity of a man. The nanoporous structure of active carbon is represented by micropores (< 1.2 nm), supermicropores (1.2-3.2 nm), and mesopores (3.2-200 nm). The developed nanoporous structure provides AC with a developed internal surface reaching 1500-2500 m 2 /g. The volume of nanopores absorbs any toxins from air, water and soil, providing protection of the atmosphere, hydrosphere, and lithosphere. With increasing anthropogenic and technogenic load on the biosphere, the role of AC in solving environmental problems will be constantly increasing.
KeywordsActive carbon; ecology; biosphere protection; detoxification of soils; purification of drinking water; purification of gases.
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