A kinetic simulation on BTEX destruction in Claus furnace by oxidizing agents
نام عام مواد
[Thesis]
نام نخستين پديدآور
Ramees Khaleel Rahman
نام ساير پديدآوران
Gupta, Abhijeet Raj
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
The Petroleum Institute (United Arab Emirates)
تاریخ نشرو بخش و غیره
2016
مشخصات ظاهری
نام خاص و کميت اثر
107
يادداشت کلی
متن يادداشت
Committee members: Berrouk, Abdallah; Wang, Kean
یادداشتهای مربوط به نشر، بخش و غیره
متن يادداشت
Place of publication: United States, Ann Arbor; ISBN=978-1-369-37457-5
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
M.S.
نظم درجات
Chemical Engineering
کسي که مدرک را اعطا کرده
The Petroleum Institute (United Arab Emirates)
امتياز متن
2016
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
The demand for low sulfur content in hydrocarbon fuels and the stringent environmental regulations has led to an increased production of acid gas (H2S and CO2) as byproducts in oil and gas industry. Consequently, the need for efficient treatment of acid gas has surfaced. Sulfur recovery units (SRU), consisting mainly of a furnace and catalytic reactors, are widely used to recover sulfur and thermal energy from acid gas. The contaminants in acid gas such as benzene, toluene, ethylbenzene, and xylenes (BTEX) and frequent variation in its composition causes flame instability and the production of unwanted byproducts such as polycyclic aromatic hydrocarbons (PAHs), CO, COS and CS2, which reduce process efficiency and increase operational cost through frequent catalyst deactivation. In this work, a detailed reaction mechanism is presented for SRU that includes reactions for the combustion of acid gas and its contaminants, and the formation and oxidation of large PAHs by several oxidants (O, O2 and OH). In order to improve xylene profile, reactions were added for xylene from the literature. Oxidation reactions for BTX by SO2 were also added into the base mechanism. In addition, rate constants for oxidation reactions for PAHs by SO2 were estimated from the reactions for smaller aromatics and these were also added. The resulting mechanism is validated with different sets of experimental data, and is used to investigate the process conditions that triggers the oxidation of aromatics (BTX and PAHs) in the furnace. The roles of feed flow rate, oxygen concentration, feed preheating and fuel gas flow rate in aromatics destruction are examined. A decrease in aromatics is observed with low acid gas flow rate due to enhanced residence time in the furnace. The increase in acid gas preheating temperatures, oxygen concentration in air and fuel gas flow rate resulted in reduced aromatics production due to their oxidation by SO2 and O2. The reaction mechanism alongside simulation results, presented herein, provide viable means of optimizing SRU to achieve efficient aromatics destruction.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Chemical engineering
اصطلاحهای موضوعی کنترل نشده
اصطلاح موضوعی
Applied sciences;BTEX;Claus;PAH;Simulation
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )