PREPARATION OF A GREEN DEMULSIFIER FROM NATURALLY OCCURRING SUBSTANCES


PREPARATION OF A GREEN DEMULSIFIER FROM NATURALLY OCCURRING SUBSTANCES

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PREPARATION OF A GREEN DEMULSIFIER FROM NATURALLY OCCURRING SUBSTANCES

CHAPTER ONE

 

INTRODUCTION

 

1.1 Background of the Study

 Water-in-oil emulsions stability is always encountered at many stages during the production and processing of crude oils. These emulsions formation is always or generally caused by the presence of resins and asphaltenes which play the main role of "natural emulsifiers", and also caused by wax and solids that accompany the crude. These components can organize and form rigid films at the oil/water interface Effective separation of oil and water is essential in order to ensuring the crude oil quality and low cost of the oil production. Chemical demulsification forms the most important step in breaking of water-in-crude oil emulsions. Various techniques are used to break these emulsions, among which the most widely used consists of adding small amounts of demulsifiers. These surface-active molecules adsorb at the oil-water interface and accelerate the phase separation (Krittika et al, 2014)

 

Among  the  most  critical  aspects  of  petroleum  production,  no  matter  what  the production system is, separating produced crude from water and basic sediments. Your profits depend on doing so efficiently. But  at  the  same  time,  dealing  with  produced water  in  an  efficient  and  environmentally  sustainable  way  is  equally  important.  The most  important  objective  of  any  oil  production  facility  is  the  separation  of  water  and other foreign materials from the produced  crude. The breaking of these crude oil and water emulsions constitutes one of the challenging problems in today’s petroleum industry (Laurrier, 1992).

 

The present day oil production contains water as one of main unavoidable associate or byproduct. Nearly 90% of crude contains oil/water emulsions. The gradual entry of water in to oil-bearing formations and the arrival of secondary and tertiary recovery methods have led to the development of new technologies that can be used to break crude oil and water emulsions.

 

Following  series  of  investigation  and  confidence  results,  the  breaking  of  water-in-petroleum emulsions is not yet completely understood, particularly  as far as  the added chemical Demulsifiers  role is concerned, and much research is still  required (Miguel et al.,  2006).  Hence  Demulsifiers  performance  has  to  therefore  be  improved,  from  the application as well as from the environmental point of view. Recently made formulations must be less toxic and at least as efficient as classical chemical families.

 

Crude oil is most often produced as a water-in-oil emulsion and the water must be removed (down to a level of <0.5%), in a process that is usually called Demulsification or  dehydration,  which  consists  of  forcing  the  coalescence  of  water  droplets  and producing their separation by settling (Miguel et al., 2006)

In order to properly separate the water from water-in-oil emulsion, demulsifiers are used as process aids. The processes involve in the breaking of these emulsions is carried out by using synthetic surfactants (Demulsifiers) which are added to water-in-oil emulsion. The function of the demulsifiers consists in Demulsification and prevention of re-emulsification by breaking the protective film which is formed on the surface of water drops, by the emulsifying agent. The demulsifying chemical is injected into emulsion and mixed with it. After that water is removed from oil by sedimentation (Koshelev et al., 2000). It is of great necessity to properly de-hydrate water-in-oil emulsion; failure to carry out this process will result in the following:

ü  Cost of pumping will increase

ü  There will be high pressure drop in flow line

ü  Corrosion of downstream processing equipment.

 

Demulsifiers are typically polymeric and interfacial active. Demulsifiers may have the following disadvantages;

ü  Most are specifically designed to treat particular crude and may not be effective in treating other crude oil emulsion.

ü  Many  are  toxic  to  the  environment,  traces  of  which  are  left  behind  in  the discarded water residue

ü  Many  requires  huge  amount  of  mixing  energy  and  thus  take  a  long  time  to accomplish the separation of water from the crude

ü  Incomplete water removal from the emulsion, leaving the problem of environmentally disposing of oil-containing effluent water at sea.

 

 Separation of the water-in-crude emulsion is a technically big challenge in the petroleum industry.  Making use of an effective demulsifier in demulsification process can save millions of Naira every year in operation cost. An increase in water content in oil of one percent can result in transportation costs increase by three to five percent (3-5%) for each transfer. The use of a demulsifier can also reduce oilfield corrosion (Loumer, 1992).

 

 Making a Green demulsifier  is reasonable  not only  due to the fact that it is environmentally  non-toxic, knowing its position as a biodegradable agent does  not  require a lot of expenses,  or  at  least  reduces  the  cost  of  clean-up  and  disposal  of  waste containing it. Therefore the desire to create “environmentally friendly” chemicals is a step in a right direction as it can actually lead to significant cost savings (Christine and Christine, 2001).

         

1.2 Statement of the Problem

Chemical method, which is mostly used in demulsification can be of threat to all the living organism in the environment where crude demulsification is being perform ( i.e. in the refinery or oil producing field ) because most of the chemicals used for crude oil emulsion breaking, such as phenol group are toxic. To avoid these toxic or environmental non-friendly emulsion breaking chemicals, other non-toxic crude emulsion breaker called “green demulsifier” have to be prepared. This is the main purpose of this work.      

 

1.3 Aim of the Work

The aim of this work is to prepare a green demulsifier from naturally occurring substances.

 

1.4 Objectives of the Work

The objectives of this work are as follows:

ü  To determine physical properties of the substance (Crude Palm Kernel Oil, Citric Acid, Bio-ethanol, Fatty Acid, Turpentine) that will be used as the demulsifier component.

ü  To evaluate their demulsification potential when combined

ü  Determination of the API of the given crude oil emulsion

ü  Determination of water/oil separation from emulsions using bottle test and centrifugal method (ASTM D96).

 

1.5 Significance of the Work

This work will focus on finding natural chemicals to replace toxic chemicals used as crude demulsifier, in crude demulsification or emulsion breaking process. If we succeed in obtaining a natural product as a demulsifier, it therefore means that in the course of solving emulsion problem, we would not be creating another problem; in environmental and health.

 

1.6 Scope of the Work

 The scope of this work will require buying the natural chemical substances, obtaining fresh crude oil emulsion from any nearby flow station, and conducting demulsifier bottle test of the natural chemicals in a laboratory.

PREPARATION OF A GREEN DEMULSIFIER FROM NATURALLY OCCURRING SUBSTANCES

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A Research proposal for preparation of a green demulsifier from naturally occurring substances:
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This work will focus on finding natural chemicals to replace toxic chemicals used as crude demulsifier, in crude demulsification or emulsion breaking process. If we succeed in obtaining a natural product as a demulsifier, it therefore means that in the course of solving emulsion problem, we would not be creating another problem; in environmental and health... chemistry project topics

PREPARATION OF A GREEN DEMULSIFIER FROM NATURALLY OCCURRING SUBSTANCES

Project Information

  • CATEGORY : CHEMISTRY
  • TYPE : PROJECT MATERIAL
  • FORMAT : MICROSOFT WORD
  • ATTRIBUTE : Documentation Only
  • PAGES : 54 Pages
  • CHAPTERS : 1 - 5
  • PRICE : ₦ 3,000.00

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