Scope of Fuel Oil Desulfurization for Japanese Refiners
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概要
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During these years the Japanese refiners have been built the topped crude desulfurizers or vacuum gas oil desulfurizers to cope with the requirement of low sulfur fuel oil production of around 1.7wt.% sulfur content. At present those refining companies are endeavoring to find the optimum operation schemes of these desulfurizers by improvement of operating condition including the hard wares.<BR>Reviewing the results of the actual operations, we must investigate the next process scheme to satisfy the more sever sulfur level requirement of the fuel oil which is expected less than 1.5wt.% in the near future.<BR>In spite of the strong recommendation for lowering the sulfur level of fuel oil by the Government, the tendency of sulfur reduction is not so progressive as the expected schedule mainly due to the following reasons. The operation of any type of desulfurizer, TC HDS or VGO HDS, is not economically justified as far as the price level of fuel oil is maintained as the same and the most of the consumers would not like to use the lower sulfur fuel oil of expensive price or use the high pour point fuel oil from Minas crude, if the some sort of acceptable regulation is not applied to such usage. Based on the above facts, the reorganization among MITI, refiners and consumers has been investigated recently for finding the effective solution of the sulfur dioxide air pollution.<BR>It is mentioned here that the fuel oil desulfurization is not only one effective procedure to cope with the air pollution because even if we can reduce the sulfur level of fuel oil to less than 1wt.%, at the same time, numbers of factories which are fuel oil consumers, will be increased up to more than double specially at the densly populated area.<BR>Of course the every effect for the reduction of the operation cost of desulfurizer should be tried. However, the change of product patterns of fuels will be necessitated and accordingly the necessity of gaseous fuel burning at the major cities will be expected. Then the new process for producing more gaseous fuel even from the heavier fraction of such an asphalt will be required in the near future.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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