عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
NATIONAL BIBLIOGRAPHY NUMBER
Number
TL48679
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
انگلیسی
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
Removal of metal contaminants from lean MDEA solvent using clay and polymer composite
General Material Designation
[Thesis]
First Statement of Responsibility
Safa Abdullah Gaber
Subsequent Statement of Responsibility
Banat, Fawzi
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
The Petroleum Institute (United Arab Emirates)
Date of Publication, Distribution, etc.
2015
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
119
GENERAL NOTES
Text of Note
Committee members: Elkadi, Mirella; Haija, Mohammad Abu; Kannan, C. S.; Pillay, Avin
NOTES PERTAINING TO PUBLICATION, DISTRIBUTION, ETC.
Text of Note
Place of publication: United States, Ann Arbor; ISBN=978-1-339-52771-0
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
M.S.
Discipline of degree
Applied Chemistry
Body granting the degree
The Petroleum Institute (United Arab Emirates)
Text preceding or following the note
2015
SUMMARY OR ABSTRACT
Text of Note
Nowadays chemical absorption using alkanolamine solutions, such as N-methyldiethanolamine (MDEA), is the most feasible method for the removal of H2S and CO2 in gas sweetening unit. However, the accumulation of heavy metals in the sweetening unit can lead to several problems such as foaming and fouling. In addition, iron being chelated to lean alkanolamine cannot be removed easily in the regenerator and causes errosion over long time. In this research work, sepiolite clay was studied as a low cost adsorbent for iron removal from MDEA. Different treatment for sepiolite clay has been investigated. The modified material was characterized by IR spectroscopy, XRD, SEM and BET. It was found that treatment with HNO3 was the best in improving the adsorption capacity of sepiolite. To determine the adsorption uptake of iron for raw and nitric acid treated sepiolite, kinetic, thermodynamic and adsorption isotherm studies were done using lean MDEA. The experimental data were analyzed using the Langmuir and Freundlich adsorption models. The Langmuir isotherm fitted well the raw sepiolite while Freundlich isotherm fitted better the acid treated samples. According to Langmuir model, the maximum adsorption uptake for raw and treated sepiolite are 0.53 and 3.3 mg/g, respectively. It was found that adsorption of iron on sepiolite before and after treatment is endothermic and spontaneous. Pseudo-second order model best represent the kinetics adsorption of iron. Desorption experiment showed that treated sepiolite can be regenerated using 0.1 M HNO3 for three consecutive cycles without obvious loss of its iron removal efficiency. The adsorption characteristics of treated sepiolite make it a promising adsorbent for iron removal. Additionally, a series of composite based on acrylamide and nitric acid treated sepiolite was prepared. The polymer samples with different sepiolite amounts were characterized by means of IR and SEM analysis. The composite exhibited less sorption capacity than sepiolite alone.
TOPICAL NAME USED AS SUBJECT
Chemistry
UNCONTROLLED SUBJECT TERMS
Subject Term
Pure sciences;Adsorption isotherm;Methyldiethanolamine;Sepiolite clay
PERSONAL NAME - PRIMARY RESPONSIBILITY
Kojoori-Saatchi, Autoosa Elizabeth
PERSONAL NAME - SECONDARY RESPONSIBILITY
Banat, Fawzi
CORPORATE BODY NAME - SECONDARY RESPONSIBILITY
Subdivision
Applied Chemistry
The Petroleum Institute (United Arab Emirates)
LOCATION AND CALL NUMBER
Call Number
1771933460; 10027573
ELECTRONIC LOCATION AND ACCESS
Electronic name
مطالعه متن کتاب p
[Thesis]
276903
a
Y
