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Oklahoma State University

Sayeed Mohammad

Research Assistant Professor

sayeed.mohammad@okstate.edu

 

ACADEMIC BACKGROUND
Ph.D., Chemical Engineering, Oklahoma State University, 2009
B.S., Chemical Engineering, Osmania University, India, 2003
 

MAJOR AREAS OF RESEARCH
• High-pressure gas adsorption and Unconventional gas reservoirs
• Equations of state and phase equilibrium modeling
• Thermophysical property predictions and molecular modeling
 

RECENT RESEARCH ACTIVITIES

High-pressure Gas Adsorption and Unconventional Gas Research
Our goal is to develop reliable generalized models for predicting high-pressure gas adsorption for systems encountered in enhanced gas recovery and carbon dioxide sequestration. Towards this, we have conducted both experimental and computational research. Recent work has included developing a structure-based generalized adsorption model, modeling the competitive adsorption of supercritical gas/water mixtures, new algorithms for multiphase analysis of gas/water mixtures, describing the swelling of coals and incorporating an improved approach for predicting the temperature dependence of supercritical gas adsorption over larger temperature ranges. Current research is focused on shale gas reservoirs in the important shale plays in the U.S. and realizing knowledge transfer from coal modeling to shales.

 

Equations of State and Phase-Equilibrium Modeling
Our approach involves developing generalized models for describing the phase equilibrium and PVT behavior of wide variety of systems. Towards this, we have developed a new volume translation function for both saturated liquid densities as well as single-phase liquid densities at high pressures. The method can be used for both pure-fluids and mixtures. The newly developed volume translation function has also eliminated a thermodynamic inconsistency that exists in many of the temperature-dependent volume translation methods in the literature. Recent work has also involved developing generalized models for estimating the interaction parameters of equation of state for predicting vapor-liquid equilibrium of a diverse set of mixtures including highly non-ideal aqueous mixtures.

 

Thermophysical Property Predictions and Molecular Modeling
We have developed new models for predictions of thermophysical properties using molecular-based approaches such as quantitative structure property modeling (QSPR). Through this approach, QSPR models have been developed for predicting critical properties of pure fluids and other thermophysical properties. Additional work is envisioned to use this approach to generalize the parameters of hybrid mixing rules of an equation of state and develop models for properties of petroleum fractions.

 

RECENT PUBLICATIONS
Journal Articles
Pongtorn Chareonsuppanimit, Sayeed A. Mohammad, Robert L. Robinson, Jr. and Khaled A. M. Gasem. “Modeling Gas-Adsorption-Induced Swelling and Permeability Changes in Coals.” International Journal of Coal Geology, 121, 98-109, 2014.

Agelia M. Abudour, Sayeed A. Mohammad, Robert L. Robinson, Jr., Khaled A.M. Gasem. “Volume-Translated Peng-Robinson Equation of State for Liquid Densities of Diverse Binary Mixtures.” Fluid Phase Equilibria, 349, 37-55, 2013.

Sayeed A. Mohammad, Khaled A. M. Gasem. “Multiphase Analysis for High-Pressure Adsorption of CO2/Water Mixtures on Wet Coals.” Energy Fuels, 26 (6), 3470-3480, 2012.

Sayeed A. Mohammad, Mahmud Sudibandriyo, James E. Fitzgerald, X. Liang, Robert L. Robinson, Jr., Khaled A. M. Gasem. “Measurements and Modeling of Excess Adsorption of Pure and Mixed Gases on Wet Coals.” Energy Fuels, 26 (5), 2899–2910, 2012.

Sayeed A. Mohammad, Khaled A. M. Gasem. “Modeling the Competitive Adsorption of CO2 and Water at High Pressures on Wet Coals.” Energy Fuels, 26 (1), 557–568, 2012.

Sayeed A. Mohammad, Arunkumar Arumugam, Robert L. Robinson, Jr., Khaled A. M. Gasem. “High-Pressure Adsorption of Pure Gases on Coals and Activated Carbon: Measurements and Modeling.” Energy Fuels, 26 (1), 536–548, 2012.

Agelia M. Abudour, Sayeed A. Mohammad, Robert L. Robinson, Jr., Khaled A.M. Gasem. “Volume-Translated Peng-Robinson Equation of State for Saturated and Single-Phase Liquid Densities.” Fluid Phase Equilibria, 335, 74-87, 2012.

Agelia M. Abudour, Sayeed A. Mohammad, Khaled A.M. Gasem. “Modeling High-Pressure Phase Equilibria of Coalbed Gases/Water Mixtures with the Peng–Robinson Equation of State.” Fluid Phase Equilibria, 319, 77-89, 2012.

Pongtorn Chareonsuppanimit, Sayeed A. Mohammad, Robert L. Robinson Jr., and Khaled A. M. Gasem. “High-Pressure Adsorption of Gases on Shales: Measurements and Modeling.” International Journal of Coal Geology, 95, 34-46, 2012.

Mahmud Sudibandriyo, Sayeed A. Mohammad, Robert L. Robinson, Jr., Khaled A. M. Gasem. “Ono-Kondo Model for High-Pressure Mixed-Gas Adsorption on Activated Carbons and Coals.” Energy Fuels, 25 (7), 3355–3367, 2011.

Book Chapters
Khaled A. M. Gasem, Sayeed A. Mohammad, Robert L. Robinson, Jr. “Modeling Coalbed Methane Adsorption and CO2 Sequestration” in Encyclopedia of Chemical Processing, S. Lee, Ed., Taylor and Francis, New York, 2009, 1:1, 1-21.

Khaled A. M. Gasem, Zhejun Pan, Sayeed Mohammad and Robert L. Robinson Jr. “Two Dimensional Equations-of-State Modeling of Adsorption of Coalbed Methane Gases” in Carbon dioxide Sequestration in Geological Media - State of the Science, M. Grobe, J. C. Pashin, and R. L. Dodge, Eds., AAPG Studies 59, 2008, 1-23.

Technical Reports
Khaled A. M. Gasem, Robert L. Robinson, Jr., Sayeed A. Mohammad, Pongtorn Chareonsuppanimit, Agelia Abudour, “Improved Equilibrium Models and Algorithms for CO2 Sequestration”. Final Technical Report: 2009-2012, Prepared for Advanced Resources International, Inc. and U.S. Department of Energy, 2012.

Khaled A. M. Gasem, Robert L. Robinson, Jr., Sayeed A. Mohammad, Jing Chen, James E. Fitzgerald. “Improved Adsorption Models for Coalbed Methane Production and CO2 Sequestration.” Final Technical Report: 2005-2007, Prepared for Advanced Resources International, Inc. and U.S. Department of Energy, 2008.