By combining catalyst design, advanced material characterization (UV-Vis and Raman spectroscopy, TPD, XRD, XPS, physisorption, chemisorption, SEM, TEM), and reaction engineering, I investigated structure–activity relationships in various metal–zeolite systems for MDA. To address a critical limitation of state-of-the-art Mo/ZSM-5 catalysts—rapid deactivation due to excessive internal coke deposition—I explored multiple strategies, including catalyst modification and incorporation of promoters to Mo/ZSM-5. Both approaches successfully improved product yields and catalyst stability. In particular, I conducted an in-depth investigation of Mo–Fe/ZSM-5 bimetallic catalysts, which revealed the formation of unique active sites arising from Mo–Fe interactions within the zeolite channels. These bimetallic sites not only enhanced hydrocarbon activation but also shifted the carbon deposition pathway, promoting carbon nanotube (CNT) formation on the external surface, resulting in significantly improved catalyst stability. Compared to the benchmark Mo/ZSM-5 system, the optimized Mo–Fe/ZSM-5 catalyst achieved up to 150% higher aromatic yield at equivalent methane conversion, while maintaining stable performance for over 30 hours under continuous reaction conditions.
This work not only advances fundamental understanding of methane activation but also aligns with industry goals for carbon-neutral chemical manufacturing, sustainable hydrocarbon conversion, and catalytic process intensification.
In addition to research, I have led laboratory setup and equipment commissioning (including gas chromatography, mass spectrometry, gas adsorption analyzers, and Raman spectroscopy), conducted lab-scale process troubleshooting, and developed standard operating procedures (SOPs). I have mentored over five undergraduate and graduate researchers in catalyst synthesis, characterization, and data analysis. I have also completed my Ph.D. coursework with a perfect 4.00 GPA, further strengthening my foundation in chemical engineering. My collaborative work with national laboratories (Idaho National Laboratory and SLAC National Accelerator Laboratory), academic institutions (Texas Tech University), and industry partners (Shepherd Chemical Company) has further reinforced my ability to thrive in fast-paced, interdisciplinary environments.
In a leadership capacity, I have served as the laboratory safety officer, ensuring compliance with safety protocols and providing training to fellow researchers. I am an active member of the Chemical Engineering Graduate Student Association (ChEGSA) and the Association of Bangladeshi Students (ABS) at Virginia Tech. My commitment to research and leadership has been recognized through multiple awards, including the Kokes Award, poster awards at professional conferences, and academic honors such as induction into the Honor Society of Phi Kappa Phi.
Research Interests