Post on 01-Dec-2015
) شھادة اخر( الدكتوراة اطاريح و الماجستير برسائل الخاص) أ( أنموذج
University of Baghdad
Al-Khwarizmi College of Engineering College Name
Biochemical Engineering Department Department
Ameel Mohammed Rahman Full Name as written in Passport
explorerxp50@yahoo.com e-mail
Professor Assistant Professor Lecturer Assistant Lecturer Career
PhD Master
Production of Butadiene from Ethyl Alcohol Thesis Title
2004 Year
An investigation was conducted to study the production of butadiene from
ethyl alcohol process by catalytic treatment. One-and two step processes are
employed in this study.
The study includes preparing the necessary catalyst needed for the catalytic
treatments, and employing theses catalysts in the one- and two-step
processes. 80%MgO:20%SiO2 and 77%MgO:4%Cr2O3:19%SiO2 catalysts were
prepared. The effect of MgO on SiO2 catalyst was also studied.
80%MgO:20%SiO2 are the optimum catalyst composition. Two commercial
(47%ZnO:42%CuO:11γ-Al2O3 and 36%ZnO:54%Cr:10γ-Al2O3) were also
studied.
Operating conditions 200-400°C, and 0.2-3.25 h-1 LHSV and atmospheric
pressure were investigated.
92wt.% ethyl alcohol was used as a feed in the one-step process and the
effects of mole ratio of ethyl alcohol to acetaldehyde in the two-step process
i.e. 1.5:1 up to 3:1 at various temperatures and LHSV were investigated in the
present study.
One-step process involves decomposition of ethanol to butadiene at 350°C,
LHSV 0.42h-1 and atmospheric pressure using four catalysts.
80%MgO:20%SiO2 prepared catalyst gave conversion, per pass yield and
ultimate yield 59.3%, 12.18% and 26% by moles respectively. While
77%MgO:4%Cr2O3:19%SiO2 prepared catalyst gave conversion, per pass yield
and ultimate yield 59.87%, 23.79% and 48.3% by moles respectively.
In the two step process, the reaction occurs in two steps. The first was the
decomposition of ethanol to acetaldehyde, and the second step involves the
reaction between ethanol and acetaldehyde to produce butadiene. At 400°C,
LHSV h-1, and ethanol to acetaldehyde mole ratio of 2.76:1 using four catalysts.
47%ZnO:42%CuO:11γ-Al2O3 catalyst gave per pass yield and ultimate yield
8.03% and 28.3% by moles respectively. While 36%ZnO:54%Cr:10γ-Al2O3
commercial catalyst gave 13.62% per pass yield and 25.83% ultimate yield.
80%MgO:20%SiO2 prepared catalyst gave per pass yield and ultimate yield
Abstract
) شھادة اخر( الدكتوراة اطاريح و الماجستير برسائل الخاص) أ( أنموذج
18.24% and 40% by moles respectively. While 77%MgO:4%Cr2O3:19%SiO2
catalystgave19.26mole%perpassyieldand40mole%ultimateyield.
Bothstepsgavesideproductssuchasethylacetate,acetone,aceticacid,…etc.
rangingfrom15wt.%upto67wt.%dependingoncatalysttypeandoperating
conditions.