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Download Catalyst Deactivation 1991. Proc. 3rd International by Bartholomew C.H., Butt J.B. (eds.) PDF

By Bartholomew C.H., Butt J.B. (eds.)

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Extra resources for Catalyst Deactivation 1991. Proc. 3rd International Symposium

Sample text

The following three subsections present the three inter-linked methods Life Cycle Assessment, Life Cycle Engineering (LCE), and Life Cycle Sustainability. LCA will be introduced first since it is subject to an ISO standard and forms the “classical” core of life cycle studies. The further developments towards LCE and LCS are addressed in the following sections. Links to further reading and other information sources will be given in the text and in the list of references. 1 Introduction For many years, the environmental assessment of materials, processes, and products took place in a rather isolated, non-quantitative manner.

It is also important to check to what extent uncertainties – for example through the estimation of data due to data gaps – may influence the result. These uncertainties may be determined by the calculation of a minimal–maximal range which reflects the possible extreme cases and the effects on the total results. The consistency check should ensure that the procedure is consistent with the goal and scope definition and that the methodology and rules have been accurately applied. 4 Conclusions and Recommendations The third phase contains the conclusions, the recommendations, and the presentation of results.

The relative relevancy of the environmental problem field Global Warming is weighted against that of Acidification, for example. What needs to be taken into consideration is that a weighting of such different environmental impacts is based on values and therefore cannot be attributed to scientific knowledge. In special cases however, the impact assessment results can be further aggregated in an evaluation. A prerequisite for this is that the impact assessment results maintain their transparency and accuracy and that the data before weighting is available.

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