[en] This fact sheet explains how Anon, Inc., has developed a novel method of removing photoresist--a light-sensitive material used to produce semiconductor wafers for computers--from the computer manufacturing process at reduced cost and greater efficiency. The new technology is technically superior to existing semiconductor cleaning methods and results in reduced use of hazardous chemicals

[en] Sulfur dioxide (SO₂) and nitrogen oxides (NO_X) are major air pollutants. Before emitting flue gas into the atmosphere, these pollutants must be removed using various processes. A sol-gel process has been developed to prepare alumina granular support and catalyst. The sol-gel-derived alumina granules have a large surface area, large pore volume, uniform pore size distribution, and excellent mechanical properties such as attrition resistance and crush strength. This paper discussed an experiment that synthesized two catalysts using the sol-gel oil-drop method. The paper described the experimental procedure and presented the results of the experiment. This included the effect of temperature on the catalytic activity of CuO-CeO₂-MnOx/y-Al₂O₃ catalysts; desorption of ammonia (NH₃) and nitric oxide (NO) on the CuO-CeO₂-MnOx/y-Al₂O₃ catalysts; transient response of NH₃ and NO on CuO-CeO₂-MnOx/y-Al₂O₃ catalysts; and the reaction kinetics and characterization of CuO-CeO₂-MnOx/y-Al₂O₃ catalysts. It was concluded that the CuO-CeO₂-MnOx/y-Al₂O₃ catalysts made by the sol-gel method have higher activity and a wider operating temperature range. 17 refs., 1 tab., 9 figs

[en] Hydrogen can be an attractive energy if it can be produced cleanly and in a cost effective manner. Nuclear energy can be used as a source of a high temperature process up to 1000 for a hydrogen production. The sulfur-iodine (SI) cycle is a baseline candidate thermo-chemical process. It consists of the following three chemical reactions which yield a dissociation of water. The decomposition at a high temperature of the sulfuric acid is the most energy-demanding reaction both from fundamental and applied points of views which represents the key reaction of the whole SI cycle. In this paper, a shell-and-catalyst-packed-tube type is selected and its fluidic characteristics are applied to an overall heat transfer coefficient calculation. As a result of the study, the sulfur trioxide decomposers for 300mole/s (200MW_th VHTR 40% thermal efficiency) and 60mole/s (40MW_th VHTR 40% thermal efficiency) hydrogen production rates are presented and discussed

[en] Related to general topics of the project EUROTRAC (set up within initiative of the European Research Coordination Agency EUREKA), main objectives of the subproject HALIPP bound with chemistry leading to 'acid rains' are discussed. Exemplary results of the kinetic-mechanistic study of sulfur pollutants transformations in troposphere are shown as the Polish contribution to this project. (author). 7 refs, 3 figs

No abstract available

[en] The construction work of a small-scale high temperature and high-pressure gas loop has been initiated in the beginning of last year as a series of the nuclear hydrogen production project. The loop consists of a primary loop and a secondary loop. The detail description of a loop is shown in reference 1. A primary loop would provide high temperature nitrogen more than the 950 .deg. C under the 4 MPa pressure environments. The high enthalpy of nitrogen transfers the energy to the sulfur trioxide flowing through the secondary loop at the process heat exchanger (PHE) and the trioxide sulfur is divided into dioxide sulfur and oxygen. The objective of the loop is to provide the high pressure and temperature environment to development of a high performance PHE and the performance test of the material. The primary loop will be constructed until the end of February 2007

[en] Bacterial leaching was carried out to leach uranium tailings from Remaja Kalimantan U ore. Nine hundreds ml of T. ferrooxidans F 402 inoculum was used in density of 9 exp.3 bacteria/ml. Some growth medium were used i.e. Silverman or 9 K medium, sulfuric acid Ph 1.5 and 2.0; and NaClO3 as oxydizing agent. Twenty tons of U ore was mounted on a Heat leaching experiment. T. ferooxidans F 402 was able to grow satisfactorily in the semi field experiment. In leaching solution, composed of 9 K compounds, bacteria grew well indicated in the number of bacteria in the solution, the oxidation of Fe2+ =====> Fe3+ caised increase in redox potential. The addition of NaClO3 did not oxydazed Fe2+ =====> Fe3+. The mixture of 4 kg NaClO3 and 1/5 dose of 9 K compounds resulted in slow oxidation. (author). 11 refs, 3 figs, 5 tabs

[en] Installation of a wet limestone flue gas desulphurization process at Suncor's Fort McMurray Oil Sands Plant to reduce SO₂ emissions, was described. The Chiyoda CT-121 process was chosen based on the economics and technical merit of the process. Key factors that affected the decision in favor of this process were: (1) the absence of a large pumping cycle spray loop, (2) ability to achieve high SO₂ removal efficiencies, up to 95 per cent, (3) easy control process; (4) low potential for scaling; (5) low power requirements, and (6) economic competitiveness with other technologies. Unlike traditional spray tower technologies, the CT-121 bubbles the flue gas through a limestone slurry bath. The cleaned gas is eventually discharged into the atmosphere. 3 refs., 10 figs

[en] Material produced from nuclear incidents, which is deposited onto plant surfaces, can be lost in a variety of ways including the removal of the deposited material in association with the leaf surface layers. This 'field loss' has previously been shown to occur under dry conditions by the transfer of deposited material from one plant, spatially seperated from another, 'and it has been postulated that the vector for this transfer is the epicuticular wax on the leaf surface. There is clear evidence that air pollutants, including SO₂, alter the morphology of epicuticular wax. Therefore, it is postulated that the presence of air pollutants will affect the rate of field loss of deposited material. The work examined whether the rate of field loss of deposited material was modified by the level of leaf epicuticular wax, and examined the potential interaction of field loss with air pollutants. Two preliminary experiments were performed by depositing the activable rare earth element Dysprosium (Dy) onto peas, and determining the level of transfer onto 'clean' plants. A low level of transfer was suggested. A stirred box was designed and manufactured for the deposition of a soluble 5μm Cs aerosol onto peas with 'waxy' and 'waxless' surfaces. After a growth period of one month in the absence of rain, substantial field loss was shown (ca. 50%). This loss was independent of the wax levels. Subsequently, an aerosol of Cs labelled silica was deposited over a canopy of 'waxy' peas in a wind tunnel under defined aerodynamic conditions. After a similar growth period, substantial field loss was shown to occur in the absence of rain. A deposition velocity for the aerosol was calculated, and flow measurements over the canopy were performed. The epicuticular wax of barley, grown in an SO₂ field fumigation system, was periodically examined for damage. Material grown under background and elevated SO₂ conditions was transported from the site to the wind tunnel. A deposition of labelled silica was performed, and the field loss followed over a time course. A deposition velocity for the aerosol was calculated, and flow measurements over the canopy were performed. The interception and retention results from the experiments are considered in terms of the postulated mechanisms of field loss. (author)

[en] Environmental protection issues have exceeded the national borders, they became global. Thus it is necessary to elaborate a unique environmental policy, which will have to take into consideration all the economic aspects of the energy sector in connection with the regional pollution impacts. Energy production units are sever sources of damaging of the environment and that's why it is necessary to implement methods, techniques and environmental managerial instruments. Thus, to ensure a motivational basis for any environmental investment a as complete as possible data supply concerning the air, water and land pollution is needed. This task implies the consideration of all the controllable phenomena and processes dynamics which result in necessity of undertaking the corresponding investigations. The results of this activity are presented in this paper. (author). 1 fig., 5 tabs