Wax Treatment Chemicals Compared with Diluents and Their Impact on Improving the Flow Properties of Sudanese Crude Oil

Abstract

The aim of this Study is to characterizing the Pour Point Depressant (PPDs) by GC and FTIR, Evaluating their Impact on Flow Properties in Sudanese Crude Oil (Neem Filed) and Comparing their Effect with Kerosene and Diesel. Five commercial pour point depressant have been tested for their structure and effectiveness in remediating paraffin (wax) depositions from neem crude oil. All PPDS were characterized by FTIR the results showed that all sample contain aromatic compound, aliphatic compound but some of them contain ester and olfien .The samples were also surveyed by GC ,The results show follows all PPDS Contain mainly different type of solvents such as ethyl benzene ,O-xylene,p-xylene,toluene in high concentration ,naphthalene ,cyclopentylcyclopentene,1,2,3,4tetramethyl benzene,1,2,3trimethyl benzene and eicosadiene in small concentration PPDS evaluated as pour point depressant and flow improver on neem crude oil. the pour point and viscosity at different temperature for different doses (500,750,1000,1250ppm) were studied by measuring viscosity and pour point, result showed that the best viscosity was improved when adding epri2 at doses1250 ppm then epri 1 then china PPDS but epri25j1 did not have any effect in these type of crude oil . the result of pour point showed that the best results were epri2 PPDS giving a reduction in pour point of 9 C0 ,followed by epri1 PPDS , china PPDS ,but epri25j1 did not have any effect Also kerosene and diesel have been tested for their effectiveness in remediating paraffin wax depositions from neem crude oil and compare it with PPDS ,it is found that need high doses of solvent(5%,10%,15%,20%,25%,30%,35%) to make change in the pour point and viscosity this compares with PPDS . But in term of cost, it is found that these large doses are not a problem because they are retrieved when distilling crude oil into product. When comparing kerosene with diesel, it is found that the rate of reduction in pour point and viscosity of neem crude oil in kerosene bigger than diesel GC and FTIR were used to study the chemical composition of wax extracted from two type of Sudanese crude oil (neem,hadida),the result showed that it consists of only normal paraffins ,the carbon number distribution in neem crude oil fromC11-C29 and the critical carbon numberC17,For hadida crude oil the carbon number distribution C11-C30 and the critical carbon number C15. Also the DSC-1 was used to measure melting point and crystallization point of wax the results showed that the melting point from wax exctracted from neem52C0and crystallization is46C0,and for hadida crude oil the melting point is68C0and the crystallization point is63C0.