M. Sam Mannan

Texas A&M University

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Co-Authors

William J. Rogers

Texas A&M University

William J. Rogers

University of Alabama at Birmingham

Richart Vázquez-Román

Technological Institute of Celaya

Maria Papadaki

Hellenic Centre for Marine Research

Dedy Ng

Texas A&M University

Qingsheng Wang

First Hospital of Qinhuangdao

Ray A. Mentzer

Purdue University West Lafayette

Hans J. Pasman

Texas A&M University System

Noor Quddus

Mary Kay (United States)

Prerna Jain

Mary Kay (United States)

Cooperative Institutions

Texas A&M University

277

Mary Kay (United States)

185

Texas A&M University System

111

Mitchell Institute

College Station Medical Center

Chinese Academy of Sciences

Nanjing Tech University

Texas A&M University at Qatar

Technological Institute of Celaya

Zhejiang University

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Reaction hazard and mechanism study of H2O2 oxidation of 2-butanol to methyl ethyl ketone using DSC, Phi-TEC II and GC-MS

Journal of Loss Prevention in the Process Industries (2020)

Yue Sun Lei Ni Maria Papadaki Zeren Jiao Wen Zhu

Polyoxometalate

Exothermic reaction

Reaction calorimeter

Calorimeter (particle physics)

10.1016/j.jlp.2020.104177

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Citations (17)

Resilience-Based Process Upset Event Prediction Analysis for Uncertainty Management Using Bayesian Deep Learning: Application to a Polyvinyl Chloride Process System

Industrial & Engineering Chemistry Research (2018)

Prerna Jain Antik Chakraborty Efstratios N. Pistikopoulos M. Sam Mannan

There are uncertainties involved in the risk assessment of process systems operations. Also, systems are complex and deteriorate gradually with time or due to exposure to expected or unexpected disturbances and events. Questions such as "what is the frequency of a process upset?" and "can we predict incidents?" have yet to be explored and answered. With the use of the Process Resilience Analysis Framework, this work presents a resilience-based approach to managing uncertainties to better predict process upsets. Prior specification on uncertain parameters is assumed based on historical data. Popular sampling and Bayesian techniques such as Markov chain Monte Carlo simulation and mixture modeling are used for posterior inference on the parameters. The application of the predictability assessment for uncertainty management is demonstrated using a polyvinyl chloride process system. A total of three types of uncertainties (cooling medium temperature, agitator failure, and reactants charging) are considered. It is concluded that with the use of resilience metrics data, the variance of statistical parameters can be updated, leading to high-probability regions of the parameter space responsible for the observed data. This helps the risk assessors make more-accurate and informed process risk decisions.

Resilience

Upset

10.1021/acs.iecr.8b01069

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Citations (15)

Prediction of Thermochemical Properties for Gaseous Ammonia Oxide

Journal of Chemical & Engineering Data (2010)

Qingsheng Wang M. Sam Mannan

Ammonia oxide (NH3O), a zwitterionic tautomer of hydroxylamine (NH2OH), has been identified to explain the high reactivity of NH2OH. Recent evidence has shown that ammonia oxide exists in the condense phase and aqueous solution. However, neither experimental nor theoretical data of its thermochemical properties are presently available. In this work, thermochemical parameters of ammonia oxide are calculated, under standard conditions, using isodesmic reactions at several theoretical methods (HF, MP2, B3LYP, G2, G2MP2, G3, G3B3, and CBS-Q) and several basis sets (Dunning correlation-consistent and Pople-style). To monitor the computed values, the values of hydrogen peroxide are calculated by the same methods and compared with the experimental data. The quantum chemistry calculations predict the value of molar enthalpy of formation to be (55.7 ± 2.9) kJ·mol−1 and molar Gibbs energy of formation to be (103.8 ± 2.9) kJ·mol−1, for gaseous ammonia oxide at 1 atm and 298.15 K. The determined molar entropy and molar heat capacity at constant volume, also at 1 atm and 298.15 K, are (221.1 ± 0.1) J·mol−1·K−1 and (28.9 ± 0.3) J·mol−1·K−1, respectively. We have demonstrated that molecular simulation is a powerful tool to obtain thermodynamic properties of unstable compounds, such as ammonia oxide.

Standard molar entropy

Isodesmic reaction

10.1021/je1006899

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Citations (23)

Investigating written procedures in process safety: Qualitative data analysis of interviews from high risk facilities

Process Safety and Environmental Protection (2017)

Farzan Sasangohar S. Camille Peres Jason P. Williams Alec Smith M. Sam Mannan

Process Safety

Qualitative analysis

10.1016/j.psep.2017.09.010

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Citations (36)

Predictive correlations for leaking heat transfer fluid aerosols in air

Journal of Loss Prevention in the Process Industries (2003)

Kiran Krishna T.K. Kim Kenneth D. Kihm W.J. Rogers M. Sam Mannan

Flammable liquid

Mist

Dust explosion

Heat transfer fluid

Particle (ecology)

10.1016/s0950-4230(02)00091-8

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Citations (14)

Extinguishing fires involving ammonium nitrate stock with water: Possible complications

Journal of Fire Sciences (2017)

Zhe Han Hans J. Pasman M. Sam Mannan

Violent decomposition and explosion of ammonium nitrate induced by a fire present potentially a serious threat to personnel, facilities, and nearby community. One of the most recent incidents involving ammonium nitrate occurred on 17 April 2013, in West, Texas, killing 15 people and injuring more than 250 people; this incident has caused heated discussion again on the safety issues associated with ammonium nitrate including firefighting issues. In terms of fire protection, water suppression systems have been widely used in chemical process facilities as an active protection layer, and they have been successful in tackling most of the fires. However, where water is the only agent to fight a fire in an ammonium nitrate store, acting as a cooling and hence combustion extinguishing agent, it does not limit the oxidant supply as this is contained within the ammonium nitrate molecule. Under some circumstances, the addition of water may also favor the conditions for explosion. In this article, the possible role of water interfering physically and to some extent chemically with ammonium nitrate stock in a fire is discussed, calling for more research to develop an optimal procedure to fight ammonium nitrate fertilizer fires.

Ammonium nitrate

10.1177/0734904117735264

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Citations (16)

Liquefied Natural Gas Vapor Hazard Mitigation with Expansion Foam Using a Research-Scale Foam Generator

Industrial & Engineering Chemistry Research (2016)

Bin Zhang Brian Z. Harding Yi Liu M. Sam Mannan

The flammable vapor cloud is the primary hazard caused by a liquefied natural gas (LNG) spill on land. If it is not properly mitigated, an ignition of the vapor cloud will result in a fire or explosion hazard. High expansion foam is recommended by NFPA 11 and NFPA 471 for LNG spill hazards mitigation. This work studied the physical interaction of the LNG and expansion foam system using a foam generator and a foam test apparatus that are built in-house. The performance of the foam generator was characterized in terms of the foam expansion ratio and generation rate. The temperature profile in the foam zone quantitatively confirmed the warming effect of foam on LNG vapor. The foam breaking rate was determined at the initial stage and steady state. The boil-off effect was studied quantitatively with more details using this novel foam generator. The vapor channel formation and vapor concentration were also investigated for the mitigation effect.

Liquefied natural gas

Flammable liquid

Expansion ratio

10.1021/acs.iecr.5b04535

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Citations (12)

Development of a Risk Based Inherent Safety Index Using an Integrated Approach

Wei Xu Bin Zhang Yue Sun Harold Escobar Prerna Jain

Copyright © 2018 by Mary Kay O’Connor Process Safety Center Prepared for Presentation at American Institute of Chemical Engineers 2018 Spring Meeting and 14th Global Congress on Process Safety Orlando, Florida April 22 – 25, 2018

Process Safety

Process safety management

Presentation (obstetrics)

Center (category theory)

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Citations (0)

Consider Aerosol Formation in Heat Transfer Fluid Selection

Chemical engineering progress (2004)

William J. Rogers M. Sam Mannan Kiran Krishna

The hazards of gas explosions are well documented and safety systems have been developed to mitigate these hazards. Personnel are well trained in recognizing hazardous scenarios and adopting safety systems. The problem lies in the fact that the training imparted generally recognizes that gas explosion hazards require the fuel in the vapor form and thus deal with hazardous conditions above the liquid's flash point. Most literature do not address hazards below the flash point. Are hazardous scenarios possible below the liquid's flash point? The simple answer to this question is YES. An aerosol is a suspension of solid or liquid particles in a gas. Aerosols of heavy hydrocarbons consist of liquid droplets suspended in air. Heavy hydrocarbons are widely used in the process industry as in heat exchangers, pumps, gears, etc. Process equipment inevitably fails sometime during its lifetime, and leaks are a consequence of such failure. Depending on the conditions, the bulk heavy hydrocarbon may be emitted from the leak in the form of a stream, aerosol, vapor or any combination of these.

Flash point

Source

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Citations (3)

Prediction of minimum ignition energy of aerosols using flame kernel modeling combined with flame front propagation theory

Journal of Loss Prevention in the Process Industries (2011)

Peng Lian Xiaodan Gao M. Sam Mannan

Minimum ignition energy

Equivalence ratio

Tetralin

Autoignition temperature

Flammable liquid

10.1016/j.jlp.2011.07.006

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Citations (17)