) 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.