Experimental on sulfur reduction process for waste product and biodiesel fuel
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Date
2018-05
Authors
Intan Norshalina Sahrudin
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Abstract
This research is made to solve a problem of the high sulfur content in the lower
grade biodiesel fuel such as the crude palm oil, waste cooking oil, and waste engine oil.
High sulfur content in the biodiesel fuel that used in diesel engine may affect the
environment as the sulfur dioxide (SO2) is emitted to the surrounding when combustion
occur. To solve this problem, a process that able to reduce sulfur content in a lower
grade biodiesel fuel which is the vacuum distillation process is developed. An Elemental
Analyzer test is made to quantify the sulfur content in the product of distillation. From
the result, the sulfur content in the waste engine oil is reduced as much as 11.95 % while
the others have the negative result. This proved that, the vacuum distillation process has
reduced the sulfur content of more than 10% of its original value. To quantify the
calorific value, Bombcalorimeter testing is conducted on the distillation product. The
result shown, the Higher Calorific Value (HCV) is increased about 0.82 % for crude
palm oil (CPO) while 0.19 % for waste engine oil and for waste cooking the result
shows the negative value. Thus, the sulfur can be removed in the waste engine oil by
the vacuum distillation process as it has a positive result of Elemental Analysis and
Bombcalorimeter testing. This study can be improved by adding other processes such
as the acid washing, solvent extraction, esterification, and transesterification in
biodiesel production to make sure more sulfur is removed.