افزايش عدد ستان تركيبات سوخت ديزل بيوديزل با استفاده از كاتاليست هيبريدي دي اكسيد سريم بر پايه نانوساختارهاي كربني

Increasing ofcetane number of diesel-biodiesel fuel blends using hybrid catalytic cerium dioxide based on carbon nanostructures

هدف از اﻧﺠﺎم اﯾﻦ ﺗﺤﻘﯿﻖ اﻓﺰاﯾﺶ ﻋﺪد ﺳﺘﺎن ﺗﺮﮐﯿﺒﺎت ﺳﻮﺧﺖ دﯾﺰل- ﺑﯿﻮدﯾﺰل ﺑﺎ اﻓﺰودن ﻧﺎﻧﻮﮐﺎﺗﺎﻟﯿﺴﺖ ﻫﯿﺒﺮﯾﺪي دي اﮐﺴﯿﺪ ﺳﺮﯾﻢ ﺑﺮ ﭘﺎﯾﻪ ﻧﺎﻧﻮ ﻟﻮﻟﻪ ﻫﺎي ﮐﺮﺑﻨﯽ ﺑﻮد. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر از دي اﮐﺴﯿﺪ ﺳﺮﯾﻢ)CeO2( ﺑﻪ ﻋﻨﻮان ﮐﺎﺗﺎﻟﯿﺴﺖ و از ﻧﺎﻧﻮ ﻟﻮﻟﻪ ﻫﺎي ﮐﺮﺑﻨﯽ ﭼﻨﺪ دﯾﻮاره )MWCNTs( ﺑﻪ ﻋﻨﻮان ﭘﺎﯾﻪ ﮐﺎﺗﺎﻟﯿﺴﺖ در ﺳﻪ ﻏﻠﻈﺖ 30، 60 و 90ppm در ﺗﺮﮐﯿﺒﺎت ﺳﻮﺧﺖ دﯾﺰل- ﺑﯿﻮدﯾﺰل ﺷﺎﻣﻞ ﺳﻮﺧﺖ دﯾﺰل )ﮔﺎزوﺋﯿﻞ(، ﺑﯿﻮدﯾﺰل)B100(، ﺗﺮﮐﯿﺐ %5 ﺑﯿﻮدﯾﺰل )B5( و %20 ﺑﯿﻮدﯾﺰل )B20( اﺳﺘﻔﺎده ﺷﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﻧﺎﻧﻮﮐﺎﺗﺎﻟﯿﺴﺖ ﺳﻨﺘﺰ ﺷﺪه ﺑﺎ داﺷﺘﻦ ﭘﺎﯾﻪ ﮐﺮﺑﻨﯽ ﻋﺎﻣﻞ دار ﺷﺪه و ﺑﺪﻟﯿﻞ ﺗﻮزﯾﻊ ﭘﺬﯾﺮ ﺑﻮدن و ﭘﺎﯾﺪاري ﻣﻨﺎﺳﺐ، ﻣﻮﺟﺐ اﻓﺰاﯾﺶ ﻗﺎﺑﻞ ﻣﻼﺣﻈﻪ ﻋﺪد ﺳﺘﺎن ﻣﯽ ﮔﺮدد. ﻫﻤﭽﻨﯿﻦ ﻧﺘﺎﯾﺞ آزﻣﻮن ﻧﺸﺎن داد ﮐﻪ ﺑﺎ اﻓﺰاﯾﺶ ﻏﻠﻈﺖ ﻧﺎﻧﻮ ﮐﺎﺗﺎﻟﯿﺴﺖ در اﻧﻮاع ﺳﻮﺧﺖ، ﻋﺪد ﺳﺘﺎن اﻓﺰاﯾﺶ ﺑﯿﺸﺘﺮي را ﻧﺸﺎن ﻣﯽ دﻫﺪ؛ ﺑﻪ ﻃﻮري ﮐﻪ ﺑﯿﺸﺘﺮﯾﻦ اﻓﺰاﯾﺶ ﻋﺪد ﺳﺘﺎن در ﻏﻠﻈﺖ 90ppm ﺑﺮاي ﺳﻮﺧﺖ دﯾﺰل ﺑﯿﻮدﯾﺰل، B5 و B20 ﺑﻪ ﺗﺮﺗﯿﺐ %1/02، %3/83، %1/19 و %3/2 ﮔﺰارش ﺷﺪ.

This study was aimed at increasing the cetane number of the blends of diesel-biodiesel fuels adding a hybrid cerium dioxide-based on carbon nano tubes catalyst. For this purpose, cerium dioxide as a catalyst and multi-walled carbon nanotubes (MWCNTs) as the support catalyst at three concentrations (30, 60 and 90 ppm) in diesel-biodiesel fuels containing diesel, biodiesel (B100), 5% biodiesel blend (B5) and 20% biodiesel blend (B20) was investigated. The results obtained revealed that the synthesized nano catalyst with a functionalized carbon support and due to flexible distribution and good stability resulted in significant increases in the cetane number. Also, the test results showed that by increasing the concentration of catalyst in fuel types, the cetane number shows a greater increase. So that the greatest increase of cetane number in concentration of 90ppm for diesel, biodiesel, B5 and B20 were reported by up to 1.02%, 3.83%, 1.19% and 3.2%, respectively.