Catalysis 2024 Issue

The diesel sample stored in a glass bottle clears sooner than a sample stored in an aluminium bottle, but the aluminium bottle may be a better representation of tank storage. There is a good correlation between moisture and haziness. Also, both haze rating methods are well correlated according to haze intensity. For the removal of moisture from diesel using the absorption technique, the rock salt dryer technique may be easier and more efficient than calcium chloride or silica gel. Generally, diesel product tanks are given around 12 hours of mixing and settling time. Hence, diesel with up to a 3 haze rating by ASTM D4176, P-2 or more than 75 by ASTM D4860 at the unit or rundown sample may become CB during certification of diesel product. However, the refinery needs to monitor haze rating properly and take corrective or preventive action according to its experience to avoid any failure of diesel product in appearance. Literature cited 1 ASTM D4176 Standard test method for free water and particu- late contamination in distillate fuels (visual inspection procedure). Procedure-1, rapid pass / fail method, and procedure-2 gross numerical rating of haze appearance. 2 ASTM D4860 Standard test method for free water and particulate contamination in distillate fuels (Clear and Bright Numerical Rating). The method is being used for the ATF MSEP test. 3 ASTM D8148 Standard test method for spectroscopic determination of haze in fuels. 4 ISO 12937 Petroleum products – Determination of water – Coulometric Karl Fischer titration method. 5 Evaluation of diesel fuel haze resulting from water content,

Coordinating Research Council (CRC), INC. Report No. 675, Alpharetta, Georgia. 6 Biodiesel: Fuel quality best management practices, Virginia Clean Cities, June 2007. Dhiraj Gondaliya is a General Manager and Head of R&D Laboratory with Nayara Energy Ltd (formerly Essar Oil Ltd), India. He has more than 30 years of experience in petroleum and petrochemical R&D and QA/ QC laboratory. He holds a Masters in organic chemistry from Saurashtra University, India. He has published research papers in international jour- nals, one book chapter, and presented numerous research papers at

conferences. He has also files several patents. Email:

Murthy Nelakanti is a General Manager and Head of Process Monitoring of Hydroprocessing and FCCU with Nayara Energy Ltd, India. He has around 29 years of experience in petroleum refinery projects, operations, and technical services. He holds an MTech in chemical engineering from Andhra University, India. He is a Fellow of The Institution of Engineers (India) and a member of Indian Institue of Chemical Engineers. Email: Kinjal Patel is a Manager of Laboratory with Nayara Energy Ltd, India. He has more than 24 years of experience in petroleum and chemical industries QA/QC. He holds a Bachelor of Science degree in chemistry

from South Gujarat University, India. Email:

Shailesh Gadhvi is Manager, R&D Laboratory, Nayara Energy Ltd, India. He has more than 27 years of experience in petroleum R&D and QA/ QC laboratory. He holds a Doctorate degree on diesel fuel from Dr. K.N. Modi University, India. He has published many research papers in national and international journals and presented research papers at oil and gas conferences. Email:

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Catalysis 2024

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