原油及柴油中難脫硫化合物的分析及關係性

本研究利用GC-FPD 及GC-MS 分析原油及柴油中的含硫成分，其中硫醇、硫醚、二硫化物、噻吩、苯並噻吩、二苯並噻吩及烷基二苯並噻吩等比較容易進行加氫脫硫處理，而4,6-DMDBT、C_3-DBT 異構物及其衍生物則屬於難脫硫的化合物，為超低硫柴油的主要含硫化合物。對柴油HDS 製程而言，溫度、壓力及H_2/oil 比會影響脫硫的效率，當規格限制的硫含量愈低時，則製程的溫度及H_2/oil 比須愈高，觸媒的失活速率隨之加劇。另由原油的分析可知當原油中難脫硫的化合物含量愈高時，則其AGO 中所含難脫硫的化合物亦相對增加，顯示難脫硫的化合物含量與原油的來源有密切的關係。

關鍵字

原油；柴油； 4,6-DMDBT ； GC-FPD

並列摘要

The objective of this work was to identify specific sulfur compounds in crude oils and diesel fuel by GC-FPD and GC-MS. Although mercaptans , sulfides, disulfides, thiophenes , benzothiophenes, dibenzothiophenes and alkyl dibenzothiophenes are common compound classes found in crude oils, 4,6-dimethydibenzothiophene(4,6-DMDBT) and C3-DBT, as name as hard sulfurs, which are the major sulfur containing compounds present in the ultra low sulfur diesel (ULSD). In the examination of sulfur compounds both in crude oils and atmosphere gas oils (AGO, a stream of diesel fuel), we can conclude that the more hard sulfur compounds found in the crude oils, the more of them remained in AGO. However, in order to meet the specification of ULSD regulation, the higher hard sulfur content of AGO need to be operated at higher temperature as well as higher H_2/oil ratio in the hydrogen desulfurization (HDS) process. This result indicated that the sulfur content of AGO is highly dependent on the hard sulfur content of crude oil.

並列關鍵字

crude oil ； diesel ； 4,6-DMDBT ； GC-FPD

國際替代計量

原油及柴油中難脫硫化合物的分析及關係性

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