Mehdi has been born in 1988 at Ardabil. He studied from primary to high school in Tabriz. He entered The University Tabriz for academic studies of chemical engineering in 2006. He continued master of science degree at Sahand University of Technology in thermo-kinetic branch. Mehdi joined the RCRC at SUT as a student and researcher in the fall of 2010. At the moment he is doing his M.Sc. thesis under supervision of Dr. Haghighi, with a topic of "Evaluation and comparison of the effect of Co promoter on the synthesized Ni/Al2O3 nanocatalyst via sol-gel & impregnation methods for production of synthesis gas".
Thesis title: Evaluation and Comparison of the Effect of Co Promoter on the Synthesized Ni/Al2O3 Nanocatalyst via
Sol-Gel & Impregnation Methods for Production of Synthesis Gas
Supervisor: Dr. Mohammad Haghighi
Co-Supervisor: -
Thesis abstract:
Different kinds of processes are used forconversion ofnatural gasintosyngas. However, during recent years dry reforming of CH4 has received more attention due to conversion ofmethane and CO2, greenhouse gases, to synthesis gas mixture with a H2/CO ratio of 1. Among the catalysts that have been tested for methane dry reforming, an inexpensive nickel-based catalyst possesses high activity at the beginning of the reaction but deactivates rapidly due to carbon deposition. The mentioned problem can be suppressed by using different types of supports, promoters and synthesis methods. In this study which has been carried out atReactor and Catalysis Research Centerof Sahand University of Technology, Ni/Al2O3 and Ni-Co/Al2O3nanocatalysts synthesized via sol-gel and impregnation methods and their physicochemical properties and catalytic performance have been examined. The nanocatalysts properties like morphology, surface area and size distribution of particles evaluated by employing different kinds of analysis such as XRD, FESEM, FTIR, BET, TG and EDAX. Generally, characterizationresults indicated thatsol-gel synthesizednanocatalysts have shown more suitable and superior physicochemicalproperties than that of samples synthesized by impregnation method.Furthermore, addition of cobalt as promoter in both methods leads to better structural properties especially in sol-gel method.
The catalytic performance of samples was investigated in atmospheric pressure, stoichiometric feed ratio, GHSV of 24 l/gcat.h and temperature range from 550 to 850ºC in a U-shaped fixed-bed quartz reactor. Catalysts were pelleted and 0.1 g was loaded to the reactor. Stability tests were performed at 850ºC for 1440 min. All catalysts were reduced 4 h in hydrogen at a flow rate of 30cm3/min and 700ºC before the catalytic tests. The results showed that for Ni-Co/Al2O3 nanocatalystsynthesized via sol-gel method, methane and carbon dioxide conversion at 850°C was in the range of 96–98% and hydrogen yield by increasing of 28% reached to 98%. Ni-Co/Al2O3(65%)-MgO(25%)-ZrO2(10%)approximately in all of the investigation ranges exhibited better performance in comparing to Ni-Co/Al2O3. Moreover, both of the mentioned nanocatalysts in temperatures higher than 750°CproduceH2/CO ratio close to1. Among the preparedsamples,Ni-Co/Al2O3(65%)-MgO(25%)-ZrO2(10%)and Ni-Co/Al2O3nanocatalystssynthesized via sol-gel method exhibited the best catalytic performance.
Education/Qualifications:
Master of Chemical Engineering, Sahand University of Technology, Tabriz, Iran (2010-2012).
Bachelor of Chemical Engineering, Tabriz University, Tabriz, Iran (2006-2010).
Research Interest:
GTL Technology
Nano Materials Synthesis
Reaction Engineering: Nano-Catalysts and Reactor Design
Awards:
Associations:
M.Sc student, Reactor and Catalysis Research Center, Sahand University of Technology, 2010 to now.
Teaching Experience:
Teaching Assistant (Mathematical Modeling in Chemical Engineering):(2011-2012) B.Sc course, Chemical Engineering Faculty, Sahand University of Technology, Sahand New Town, Tabriz, Iran.
Workshops:
Hobbies:
Mountain climbing, Walking, Book reading.
Fantasy:
Justice, World peace
Patents:
Publications/Presentations:
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Dry Reforming of CH4 over Sol-Gel Synthesized Ni-Co/Al2O3-MgO Nanocatalyst Promoted with Different Amount of ZrO2 Using Zirconyl Nitrate Solution", The 1st National Industrial Catalyst Conference (NICC1), Shiraz University, Shiraz, Iran, 20-21 February 2013.
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Effect of MgO Content on Properties and Catalytic Performance of Ni-Co over Mixed Nano-oxides of Al-Mg-Zr Used in Dry Reforming of CH4", The 14th Iranian Inorganic Chemistry Conference (XIV IICC), Sharif University of Technology, Tehran, Iran, 28-29 August 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Sol-Gel Synthesis of Ni-Co/Al2O3-MgO-ZrO2 Nanocatalyst at Different ZrO2 Contents Using Zirconyl Nitrate Hydrate Precursor for CH4/CO2 Reforming", The 14th Iranian Inorganic Chemistry Conference (XIV IICC), Sharif University of Technology, Tehran, Iran, 28-29 August 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Catalytic Performance of Ni-Co/Al2O3-MgO-ZrO2 Nanocatalyst toward CO2 Reforming of CH4: Effect of ZrO2 Precursor", The 15th Iranian Physical Chemistry Conference (PCC15), University of Tehran, Tehran, Iran, 3-6 September 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Effect of Precursor on Physicochemical Properties and Catalytic Performance of Ni-Co over Mixed Nano-oxides of Al-Mg-Zr Used in Dry Reforming of CH4", The 14th National Iranian Chemical Engineering Congress (IChEC14), Sharif University of Technology, Tehran, Iran, 16-18 October 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi and Farhad Rahmani, "Catalytic Performance of Ni-Co/Al2O3-MgO-ZrO2 Nanocatalyst at Different MgO Contents Using Zirconyl Nitrate Solution Precursor for CO2 Reforming of Methane", The 14th National Iranian Chemical Engineering Congress (IChEC14), Sharif University of Technology, Tehran, Iran, 16-18 October 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi, Ali Alizadeh Eslami and Farhad Rahmani, "Synthesis of Ni/Al2O3 and Ni-Co/Al2O3 Nanocatalysts via Consecutive Impregnation and Sol-Gel Methods", National Conference in High Technologies in Chemical Industries (NCHTCI91), Tarbiat Modares University, Tehran, Iran, 22-23 May 2012.
Seyed Mehdi Sajjadi, Mohammad Haghighi, Ali Alizadeh Eslami and Farhad Rahmani, "CO2-Reforming of Methane over Ni-Co/Al2O3 Nanocatalyst Synthesized Using Sol-Gel Method", The 4th International Congress on Nanoscience & Nanotechnology (ICNN2012), University of Kashan, Kashan, Iran, 8-10 September 2012.
Ali Alizadeh Eslami, Mohammad Haghighi, Seyed Mehdi Sajjadi and Farhad Rahmani, "Sol-Gel vs. Impregnation Synthesis of Ni-Cu/Al2O3 Nanocatalyst Used in Reforming of Methane", The 15th Iranian Physical Chemistry Conference (PCC15), University of Tehran, Tehran, Iran, 3-6 September 2012.
