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البحـث الثاني
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2016
أوابك العلمية لعام
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ص لبحوث العلمية الفائزة بجائزة
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عدد خا
مجلة النفط والتعاون العربي
161
العدد
- 2017
أربعون
المجلد الثالث و ال
Re-refining of Used Lubricating Oil and its Economic and Environmental Implications
50
Figure 26 Impacts assessment results of re-refining vs. virgin refining
Source: Own elaboration with data from ICS-UNIDO as cited in Kari-Matti (2013)
In a recent study, Grice et al (2014) showed that the carbon footprint of re-refined base
oil is 81% lower than virgin stock-derived base oil that is not re-refined.
A life-cycle analysis of waste oil regeneration versus incineration of waste oils in cement
kilns, finds that re-refining is less environmentally damaging (
OECD, 2006).
In a study
undertaken by Broughton and Horvath (2004), it was found that the impact with respect
to air and water pollution emissions and generation of solid waste are approximately
equal but emissions of heavy metals are much more severe for burning.
IFEU (2005) have reached the same conclusions as regards the environmental impacts of
re-refining versus combustion. Their study concludes that the majority of advantages
are in favor of re-refining which also causes far less environmental impact than
processing base oil from crude oil. Re-refining therefore clearly leads to a decrease in
environmental burdens. Figure 27 shows the relative differences between the
environmental impacts of re-refining and combustion considering both substitution
scenarios. It is evident that for both scenarios the majority of advantages are in favor of
re-refining.
0
20
40
60
80
100
120
Virgin refining
Re-refining
Energy Consumption
CO2 emissions