Co2 conversion

Xem 1-7 trên 7 kết quả Co2 conversion
  • The molecular carbon dioxide laser was invented in 1964 by C. K. N. Patel at Bell Labs. Immediately, it proved to be a high-power, continuous wave (CW) laser and a relatively high-efficiency gas laser (20-25% conversion of electrical energy into laser radiation), both in CW or pulsed operation. As a matter of fact, the CO2 lasers are the highest-power CW lasers (more than 100 kW) and one of the highest-energy pulsed gas laser (100 kJ) that are currently available.

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  • Carbon dioxide is produced in several anthropogenic activities at a rate of ca. 35 Gt/y. The main sources are: (1) the combustion of fossil carbon (production of electric energy, transport, heating, industry), (2) the utilization of biomass (combustion to obtain energy, fermentation), and (3) the decomposition of natural carbonates (mainly in the steel and cement industry).

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  • The industry is still improving technologically. It is far more mature than in 1993, and new developments appear poised to bring costs down further and to reduce the environmental impact of producing ethanol. In this report, we examine various production technologies, beginning with input improve- ments and then discussing process improvements, environmental technolo- gies, and technologies involving coproducts. Finally, we look at niche markets and briefly examine cellulosic conversion.

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  • In order to secure the energy supply to an increasing population and at the same time limit the damage to Earth, i.e. avoiding a fatal climate change as a result of anthropogenic emissions of greenhouse gases (primarily CO2), immediate action is necessary. This includes reducing the energy consumption, increasing the energy conversion efficiency, and using renewable energies. The transport sector is the one most dependent on fossil energy and it stands for a significant part of the energy consumption in the world.

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  • Approach to the Patient: Acid-Base Disorders A stepwise approach to the diagnosis of acid-base disorders follows (Table 48-3). Care should be taken when measuring blood gases to obtain the arterial blood sample without using excessive heparin. Blood for electrolytes and arterial blood gases should be drawn simultaneously prior to therapy, since an increase in [HCO3–] occurs with metabolic alkalosis and respiratory acidosis. Conversely, a decrease in [HCO3–] occurs in metabolic acidosis and respiratory alkalosis.

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  • Grasslands occur on every continent except Antarctica, and constitute about 34 percent of the global terrestrial carbon stock. Changes in grassland vegetation due to overgrazing, conversion to crop land, desertification, fire, fragmentation, and introduction of non‐native species affect their carbon storage capacity, and may in some cases even lead to grasslands becoming a net source of CO2. For example, they may lose 20 to 50 percent of their soil organic carbon content through cultivation, soil erosion, and land degradation.

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  • Isocitrate dehydrogenase (IDH) catalyzes the reversible conversion between isocitrate and 2-oxoglutarate accom-panied by decarboxylation/carboxylation and oxidoreduc-tion of NAD(P) + cofactor.While this enzyme has beenwell studiedas a catabolic enzyme in the tricarboxylicacid (TCA) cycle, here we have characterized NADP-dependent IDH fromChlorobiumlimicola, agreen sulfur bacteriumthat ®xes CO2 through the reductive tricarboxylic acid (RTCA) cycle, focusing on theCO2-®xation ability of the enzyme. ...

    pdf6p research12 23-04-2013 14 1   Download


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