Abstract
To overcome the inhibition of aromatic compounds in low nitrogen light cycle oil (LCO) on its deep hydrodesulfurization (HDS), CoMo and NiMo sulfide catalysts supported on γ-alumina, alumina coated zeolite (ACZ) and TiO2 were investigated with the objective of achieving ultra-low sulfur through direct desulfurization route at relatively high temperature of 360 °C. Higher temperature certainly accelerated the HDS probably through direct desulfurization route over all the catalysts studied. It also resulted in reduction of total aromatics by about 50% leading to a significant cetane number improvement. Conventional Al2O3-supported CoMo and NiMo catalysts were quite active for HDS, hydrogenation and hydrogenolysis, but they could not meet the demand of deep HDS to achieve 10-15 ppm sulfur in hydrotreated products, even at higher reaction temperatures of 340-360 °C. Higher acidity alumina coated zeolite (ACZ)-supported catalysts exhibited higher HDS activity compared to Al2O3-supported catalysts. However, they also exhibited highest cracking activity and coke formation, which make them unsuitable for deep HDS at high temperatures. Low-acidic, non-polar (TiO2 and powdered activated carbon (PAC)) supported catalysts could achieve the deep HDS of LCO at 350-360 °C. The HDS activity of TiO2-based catalysts was better than Al2O3-supported catalysts and their cracking activity was significantly lower than Al2O3- and ACZ-supported catalysts. When the LCO was hydrotreated over CoMo/PAC at 350 °C, the product contains only 12 ppm sulfur. Hence, it is concluded that low-acidic, non-polar supports (such as TiO2 and PAC) are more suitable for CoMo and NiMo catalysts to achieve deep HDS of aromatic-rich feedstock such as LCO.
| Original language | English |
|---|---|
| Pages (from-to) | 172-178 |
| Number of pages | 7 |
| Journal | Fuel Processing Technology |
| Volume | 109 |
| DOIs | |
| Publication status | Published - Jan 1 2013 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
Cite this
Hydrotreating of light cycle oil over NiMo and CoMo catalysts with different supports. / Azizi, Nor; Ali, Syed Ahmed; Alhooshani, Khalid; Kim, Taegon; Lee, Youngjin; Park, Joo Il; Miyawaki, Jin; Yoon, Seong-Ho; Mochida, Isao.
In: Fuel Processing Technology, Vol. 109, 01.01.2013, p. 172-178.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrotreating of light cycle oil over NiMo and CoMo catalysts with different supports
AU - Azizi, Nor
AU - Ali, Syed Ahmed
AU - Alhooshani, Khalid
AU - Kim, Taegon
AU - Lee, Youngjin
AU - Park, Joo Il
AU - Miyawaki, Jin
AU - Yoon, Seong-Ho
AU - Mochida, Isao
PY - 2013/1/1
Y1 - 2013/1/1
N2 - To overcome the inhibition of aromatic compounds in low nitrogen light cycle oil (LCO) on its deep hydrodesulfurization (HDS), CoMo and NiMo sulfide catalysts supported on γ-alumina, alumina coated zeolite (ACZ) and TiO2 were investigated with the objective of achieving ultra-low sulfur through direct desulfurization route at relatively high temperature of 360 °C. Higher temperature certainly accelerated the HDS probably through direct desulfurization route over all the catalysts studied. It also resulted in reduction of total aromatics by about 50% leading to a significant cetane number improvement. Conventional Al2O3-supported CoMo and NiMo catalysts were quite active for HDS, hydrogenation and hydrogenolysis, but they could not meet the demand of deep HDS to achieve 10-15 ppm sulfur in hydrotreated products, even at higher reaction temperatures of 340-360 °C. Higher acidity alumina coated zeolite (ACZ)-supported catalysts exhibited higher HDS activity compared to Al2O3-supported catalysts. However, they also exhibited highest cracking activity and coke formation, which make them unsuitable for deep HDS at high temperatures. Low-acidic, non-polar (TiO2 and powdered activated carbon (PAC)) supported catalysts could achieve the deep HDS of LCO at 350-360 °C. The HDS activity of TiO2-based catalysts was better than Al2O3-supported catalysts and their cracking activity was significantly lower than Al2O3- and ACZ-supported catalysts. When the LCO was hydrotreated over CoMo/PAC at 350 °C, the product contains only 12 ppm sulfur. Hence, it is concluded that low-acidic, non-polar supports (such as TiO2 and PAC) are more suitable for CoMo and NiMo catalysts to achieve deep HDS of aromatic-rich feedstock such as LCO.
AB - To overcome the inhibition of aromatic compounds in low nitrogen light cycle oil (LCO) on its deep hydrodesulfurization (HDS), CoMo and NiMo sulfide catalysts supported on γ-alumina, alumina coated zeolite (ACZ) and TiO2 were investigated with the objective of achieving ultra-low sulfur through direct desulfurization route at relatively high temperature of 360 °C. Higher temperature certainly accelerated the HDS probably through direct desulfurization route over all the catalysts studied. It also resulted in reduction of total aromatics by about 50% leading to a significant cetane number improvement. Conventional Al2O3-supported CoMo and NiMo catalysts were quite active for HDS, hydrogenation and hydrogenolysis, but they could not meet the demand of deep HDS to achieve 10-15 ppm sulfur in hydrotreated products, even at higher reaction temperatures of 340-360 °C. Higher acidity alumina coated zeolite (ACZ)-supported catalysts exhibited higher HDS activity compared to Al2O3-supported catalysts. However, they also exhibited highest cracking activity and coke formation, which make them unsuitable for deep HDS at high temperatures. Low-acidic, non-polar (TiO2 and powdered activated carbon (PAC)) supported catalysts could achieve the deep HDS of LCO at 350-360 °C. The HDS activity of TiO2-based catalysts was better than Al2O3-supported catalysts and their cracking activity was significantly lower than Al2O3- and ACZ-supported catalysts. When the LCO was hydrotreated over CoMo/PAC at 350 °C, the product contains only 12 ppm sulfur. Hence, it is concluded that low-acidic, non-polar supports (such as TiO2 and PAC) are more suitable for CoMo and NiMo catalysts to achieve deep HDS of aromatic-rich feedstock such as LCO.
UR - http://www.scopus.com/inward/record.url?scp=85027933898&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027933898&partnerID=8YFLogxK
U2 - 10.1016/j.fuproc.2012.11.001
DO - 10.1016/j.fuproc.2012.11.001
M3 - Article
AN - SCOPUS:85027933898
VL - 109
SP - 172
EP - 178
JO - Fuel Processing Technology
JF - Fuel Processing Technology
SN - 0378-3820
ER -