The removal of sulfur and changes of sulfur forms in Oman vacuum residue by hydrotreating were investigated on a pilot plant.The results illustrated that the content of total sulfur in hydrotreated residue reduced gra...The removal of sulfur and changes of sulfur forms in Oman vacuum residue by hydrotreating were investigated on a pilot plant.The results illustrated that the content of total sulfur in hydrotreated residue reduced gradually with the hydrotreating.Over 80% of total sulfur in the residue can be removed at three temperatures(T-5 ℃,T ℃,T+5 ℃),although a higher temperature can enhance the desulfurization effect.The residue fractions of aromatic,resin,asphaltene and saturate contain about 60%,32%,8% and 1% of total sulfur,respectively;however,the sulfur content in each fraction is in the order of asphaltene>resin>aromatic>saturate.The sulfidic sulfur content in the residue fraction decreased and the thiophenic sulfur content increased with the heaviness of residue fraction.Sulfur forms exhibit influence on the hydrodesulfurization effect;the removal of sulfidic sulfur is much easier than that of thiophenic sulfur.The residue fractions are also different in the desulphurization effect,depending on their molecular size and structure;the sulfur removal ratio of saturate and aromatic is higher than that of resin and asphaltene.展开更多
文摘The removal of sulfur and changes of sulfur forms in Oman vacuum residue by hydrotreating were investigated on a pilot plant.The results illustrated that the content of total sulfur in hydrotreated residue reduced gradually with the hydrotreating.Over 80% of total sulfur in the residue can be removed at three temperatures(T-5 ℃,T ℃,T+5 ℃),although a higher temperature can enhance the desulfurization effect.The residue fractions of aromatic,resin,asphaltene and saturate contain about 60%,32%,8% and 1% of total sulfur,respectively;however,the sulfur content in each fraction is in the order of asphaltene>resin>aromatic>saturate.The sulfidic sulfur content in the residue fraction decreased and the thiophenic sulfur content increased with the heaviness of residue fraction.Sulfur forms exhibit influence on the hydrodesulfurization effect;the removal of sulfidic sulfur is much easier than that of thiophenic sulfur.The residue fractions are also different in the desulphurization effect,depending on their molecular size and structure;the sulfur removal ratio of saturate and aromatic is higher than that of resin and asphaltene.
