Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

And the consumption of energy

This technique offers the advantage of require only moderate capital expenditure and yields a very pure product. However, continuous operation is unfeasible, and the consumption of energy and chemicals, as well as labor costs, are high. Moreover, the excess sodium sulfite produced must be sold, and one of the main outlets is the paper pulp industry. [Pg.105]

Raw meals for high-belite chnkers are relatively easy to bum, and the consumption of energy is reduced, mainly because of a reduced CaCOj content. Compared with ordinary Portland cement clinkers, it is possible to reduce the binning temperature by up to about 100 °C and along with it the NO emission. At the same time the grindability of the clinker is improved (Ludwig and Pohlman, 1986). [Pg.15]

The T-connection in the original vortex exhaust will increase the pressure loss and increase the consumption of energy. Measurements of the pressure difference in the two versions show a sevenfold higher pressure difference in the original version (Fig. 12.396) compared with the pressure difference in the simplified version (Fig. 12.39c). This fact is very important in connection with selection of a given solution. [Pg.1193]

Unlike the gasoline tax that only impacts the transportation sector, carbon taxes affect all sectors of the economy. Implemented by some European countries and proposed in the United States by the Clinton Administration in 1993, the carbon tax makes consumption of fossil fuels more expensive for the energy user. The goals of a carbon tax are to reduce the consumption of energy and to make non-carbon emitting sources like wind and hydroelectric more cost-competitive with fossil fuels. [Pg.593]

TEM observation and elemental analysis of the catalysts were performed by means of a transmission electron microscope (JEOL, JEM-201 OF) with energy dispersion spectrometer (EDS). The surface property of catalysts was analyzed by an X-ray photoelectron spectrometer (JEOL, JPS-90SX) using an A1 Ka radiation (1486.6 eV, 120 W). Carbon Is peak at binding energy of 284.6 eV due to adventitious carbon was used as an internal reference. Temperature programmed oxidation (TPO) with 5 vol.% 02/He was also performed on the catalyst after reaction, and the consumption of O2 was detected by thermal conductivity detector. The temperature was ramped at 10 K min to 1273 K. [Pg.518]

The aim is to reduce the consumption of energy and water to the bare minimum. Computerized systems are used extensively. Such systems have different names Building Automation System (BAS), Energy Management System (EMS). [Pg.233]

The sequestration of carbon in soil has a considerable influence on the GHG balance of biofuels. Although the GHG balance of the production and utilisation of energy crops is approximately zero, except for some additional C02 equivalents mainly caused by the N fertilisation and the consumption of fossil energy (see Chapters 7 through 9), the storage or the release of carbon in soil may disturb this balance. [Pg.125]

A Department of Energy study compared alternative paths for future U.S. energy use business-as-usual and energy-efficient. Both projections suggested a substantial rise in U.S. production C02 and the consumption of fossil fuels over the next few decades. The study predicted an increase in energy between 1985 and 2010 of about 30%. The projected oil and gas increase remained relatively constant over this period, but coal consumption increased greatly by more than 100%. C02 emissions rose from 1.25 billion metric tons per year to about 1.73 billion metric tons in 2010. This is a 38% increase in C02. [Pg.65]

C02is the most important gas relevant to climate and as such, is responsible for the greenhouse effect with 22% (Schonwiese 1995). CO2 emissions are produced by burning fossil energy. Thus, agriculture s contribution to CO2 emission derives from both direct consumption of oil and fuel and indirect consumption of energy (e.g. production and transport of fertilisers, pesticides). [Pg.54]

The purity of the generated hydrogen is 98 9 per cent, and that of the oxygen 97 per cent. On an average the consumption of energy is 417 KW.H. per cubic metre of mixed gases, and a current output of 96 per cent, is attained with an energy efficiency of 57 per cent. [Pg.12]

The energy-based industrial and scientific revolution, which continues today, has given us massively magnified powers over the forces of nature. Disease has been reduced food and shelter have become more readily available transportation and communication have leaped forward. Over time, this progress has accelerated the growth of population and the consumption of food, timber, minerals, and aquatic life. Billions of people are now able to live lives of material splendor. With a flick of the switch, we can illuminate where and when we wish, heat and cool our structures, move about (physically and figuratively) with unbelievable speed and freedom, dispose of our wastes, treat our sick, and explore the universe. [Pg.10]

Current efficiency increases when the temperature of the eleotrolyte decreases. In spite of this, the electrolyte is not cooled below + 10 °C in practice, because at a lower temperature the conductivity of the eleotrolyte is reduced and, consequently, the consumption of energy does not diminish but aotually increases. At a too low temperature there is also the danger that solid oarbonate and bicarbonate will separate from the solution. [Pg.426]

This behavior permits the discarding of the earthenware cylinder. It suffices to envelop the cathodes with parchment paper, whereby the resistance and the consumption of electrical energy is considerably diminished. The diffusion of the free alkali hydroxide away from the cathode necessitates the continuous introduction of carbonic-acid gas, because caustic alkali prevents the formation of iodoform, while carbonate promotes it. When using the covered cathodes, 20 g. calcined soda, 20 g. potassium iodide, and 50 cc. alcohol in 200 cc. water are electrolyzed at a temperature of 50°-70° a current of carbonic-acid gas being conducted into the solution between anode and... [Pg.61]

The optimum benefits to thermal comfort that textiles can provide at conservative thermostat settings can then be used by textile manufacturers, businesses, and consumers to reduce the consumption of energy for heating and cooling indoor habitats. [Pg.273]

Thus, the synthetic process for the preparation of (56) represents a highly eco-friendly synthesis of bicyclononanes, in which at least four new C-C bonds are formed in a one-pot way (33-56), in very good overall yields and minimum consumption of energy (room temperature). [Pg.69]

In effect, such a multi-scale analysis resolves a macro-scale heterogeneous system into three meso- to micro-scale subsystems—dense-phase, dilute-phase and inter-phase. Thus, modeling a heterogeneous particle-fluid two-phase system is reduced to calculations for the three lower-scale subsystems, making possible the application of the much simpler theory of particulate fluidization to aggregative fluidization and the formulation of energy consumptions with respect to phases (dense, dilute and inter) and processes (transport, suspension and dissipation). [Pg.161]


See other pages where And the consumption of energy is mentioned: [Pg.560]    [Pg.449]    [Pg.74]    [Pg.222]    [Pg.225]    [Pg.560]    [Pg.449]    [Pg.74]    [Pg.222]    [Pg.225]    [Pg.9]    [Pg.95]    [Pg.417]    [Pg.758]    [Pg.788]    [Pg.294]    [Pg.186]    [Pg.124]    [Pg.273]    [Pg.274]    [Pg.62]    [Pg.277]    [Pg.76]    [Pg.236]    [Pg.154]    [Pg.164]    [Pg.107]    [Pg.35]    [Pg.27]    [Pg.157]    [Pg.280]    [Pg.4]    [Pg.107]    [Pg.312]    [Pg.339]    [Pg.263]    [Pg.401]    [Pg.287]   
See also in sourсe #XX -- [ Pg.156 ]




SEARCH



Consumption of energy

Energy consumption

© 2024 chempedia.info