Videos by Awajiogak A Ujile
This presentation is focused on the linkages between water, energy and food. The impact of climat... more This presentation is focused on the linkages between water, energy and food. The impact of climate change on the nexus is highlighted. Understanding the interlinkages between water, energy and food is essential to properly combat the stresses of climate change, resource depletion and increase demands on global food security. Two scenarios – (1) An agro-industrial eco-complex, producing sugar, ethanol and paper; (2) household potable water production from groundwater resource at Unyengala, Andoni Rivers State with energy saving system developed by the presenter; show the challenges and opportunities for chemical engineers. The analysis indeed show that it requires water and energy to produce food, it requires water and possibly biomass to produce energy and it requires energy to produce usable water. Furthermore, global water requirements have increased with time and population growth. 39 views
Papers by Awajiogak A Ujile
Journal of Applied Sciences and Environmental Management
Faujasite, a molecular sieve zeolite Y aluminosilicate mineral, has excellent catalytic strength ... more Faujasite, a molecular sieve zeolite Y aluminosilicate mineral, has excellent catalytic strength and is employed in various industries. The study therefore, seek to synthesize a faujasite zeolite with a hydrothermal treatment of local clay alumina and rice husk silica using central composite design (CCD) of experiment in response surface methodology (RSM) in a 1000ml 2-neck flat bottom flask on a constant temperature magnetic stirrer at 120oC for 6 hours. SiO2, Al2O3, and NaOH were coded at three levels at various masses and Si/Al mole ratios. A significant model with an F-value of 142.27 and a Predicted R2 of 0.9558 was developed using statistically optimized hydrothermal synthesis. 3.07g NaOH, 10.50g SiO2, and 2.61g Al2O3 were needed to synthesize FAU zeolite with Si/Al mole ratio > 2. At 1095.8cm-1 in IR spectrum, silicone (Si – O – Si) was the most abundant functional group in the zeolite. EDS and XRD revealed a faujasite zeolite-Y with 85.60wt% Si and 17.50wt% Al. Octahedral...
CERN European Organization for Nuclear Research - Zenodo, Aug 26, 2022
Journal of Thermodynamics, 2014
This paper has applied thermodynamics principles to evaluate the reliability of 390 m3/hr natural... more This paper has applied thermodynamics principles to evaluate the reliability of 390 m3/hr natural gas processing plant. The thermodynamics equations were utilized in the evaluation, characterization, and numerical simulation of key process parameters in natural gas liquid extraction plant. The results obtained show the comparison of the coefficient of performance, compression ratio, isentropic work, actual work, electrical power requirements, cooling water consumption in intercoolers, compressor power output, compressor capacity, and isentropic, volumetric, and mechanical efficiency of the two-stage refrigeration unit with a flash gas economizer and these were compared with the designed specifications. The second law of thermodynamics was applied in analyzing the refrigeration unit and the result shows that exergetic losses or lost work due to irreversibility falls within operating limit that is less than 1.0%. Similarly, the performance of expansion turbine (expander) parameters wa...
European Journal of Engineering Research and Science, 2019
This study aim to proffer solution to the factors causing delay is pipeline construction project ... more This study aim to proffer solution to the factors causing delay is pipeline construction project deliverables, it compared deterministic model (variable with certainty) and stochastic model (variable with uncertainty), with Six (6) planned project schedules of Brownfield Energy Service Limited for pipeline construction. Time assigned to critical activities, identified from a network analysis, with the aid of the Critical Path Method, expected mean time, both deterministic and stochastic duration was calculated. Program Evaluation Review Techniques (PERT), the variance and standard deviation of the critical activities were also calculated. The probability of completion of a project within a given period was gotten with PERT. Comparing the results for deterministic duration 60 days to 79 days, which is 50% compared to 64%. It was concluded that stochastic model is preferable when scheduling and executing pipeline construction projects, because uncertainties are factored into the plann...
Chemical and Process Engineering Research, 2018
The potential of an agro-based industrial waste, dry empty oil palm bunch (DEOPB), obtained from ... more The potential of an agro-based industrial waste, dry empty oil palm bunch (DEOPB), obtained from a local oil palm processing mill was explored to treat effluent from a petrochemical plant. The adsorbent was subjected to pyrolysis and chemically activated using a 0.1mol hydrochloric acid (HCl). The adsorption behaviors of iron, copper and cadmium were found to obey Pseudo Second Order kinetic model, Brunauer, Emmet and Teller (BET) and the Langmuir isotherm models were used to fit the iron, copper and cadmium adsorption isotherm onto the DEOPB activated carbon with their equilibrium capacities agreeing with experimental data except for the lead component that showed no effect. The heavy metals contaminants investigated using this technique was found to have been removed from the wastewater stream in the following percentage efficiency: iron; 57%, copper; 99.6% and cadmium; 90% but was ineffective in the removal of the lead component as its concentration remained unchanged throughou...
Magnesium chloride, an important source of magnesium, chlorine and other related products was ext... more Magnesium chloride, an important source of magnesium, chlorine and other related products was extracted from brackish water obtained from Kaa, Eagle Island, Opobo and Iwofe water fronts in Rivers State using conventional methods. This involved the concentration of the sea water from 10 L to below 1 L before reacting with CaO to precipitate Mg(OH)2.The precipitates were washed, filtered and dissolved in 200 ml of 1.0 M HCl to form MgCl2 solution. The solution was evaporated to dryness in order to crystallize MgCl2.6H2O salt. The different yields of the salts obtained were 0.79, 0.73, 0.4 and 0.2 g/L for the Kaa, Eagle Island, Opobo and Iwofe brackish waters, respectively. Physicochemical parameters such as pH, conductivity and total salinity of the salts obtained followed the same trend of Kaa> Eagle Island>Opobo>Iwofe. The salts were characterized using XRD and XRF. The XRD gave major reflections of hydrated magnesium chloride salt while the XRF showed the elemental composi...
European Journal of Engineering Research and Science, 2019
This work was predicated on the design and costing of a packed column absorber required to remove... more This work was predicated on the design and costing of a packed column absorber required to remove SO2 from an air/SO2 mixture. The absorber is intended to be developed into an already existing combustion system as a retrofit. The gas flow rate basis of the computation was 40,000Kg/h. The Onda Method was used to estimate the column height as 9m and the column diameter as 2.5m while the column wall thickness as well as the domed head thickness was found to be 9mm using the BS 5500 Standard Method. In order to limit expenses, H2O was utilized as the absorber solvent and a flow rate of 29.5Kg/s to limit solvent usage. A pressure drop of 20mmH2O/m was assumed in the design with metal pall rings of diameter 51mm and surface area of 102m2/m3 chosen as the packing material. The study estimated a profound $306,559.87 as the cost of the absorber required to remove 95% SO2 content from the combustion waste stream.
Journal of Modern Physics, 2018
International Journal of Chemical and Process Engineering Research, 2014
The determination of plate efficiency of rectification column for the separation of Bonny Light C... more The determination of plate efficiency of rectification column for the separation of Bonny Light Crude Oil into its fractions was studied. The atmospheric distillation column of a typical Refinery (PHRC) was used in determining the efficiencies of the bubble-cap plate of the column. It was observed that the efficiency of the plates below the feed plate varies, but above the feed plate, it increases up the top of the column and was highest at top plate. The total number of ideal and actual plates was found to be 7. The Murphree equation for plate efficiency was used to determine the overall efficiency of the column with the aid of the McCabe-Thiele diagram to be 93.9 %. This work has shown the efficiency, reliability and integrity of the plant.
A step-by–step procedure on the separation of methanol-water mixture has been developed. Applicat... more A step-by–step procedure on the separation of methanol-water mixture has been developed. Application of ASPEN PLUS Software was utilized. Aspen Plus interface with Thermodynamics Package selection and an activity coefficient model are incorporated. UNIQUAC is used. Results obtained have shown a simple method that can be easily used by all chemical engineers at all levels. The developed method can be used for separation of other mixtures in the separation process industries.
This research project evaluates the problem of flooding in a distillation column that uses sieve ... more This research project evaluates the problem of flooding in a distillation column that uses sieve tray. Data obtained from a typical crude oil refining company in Nigeria were used in the various calculations using the Kister and Haas; as well as the Fair’s correlations. The flooding capacity of the column and its effect on the fractional hole area, hole diameter and tray spacing of the column were determined. The flooding capacity was determined as 0.104 m/s and 0.121 m/s for the two correlations. The flooding capacity has a directly proportional relationship with the tray spacing TS and fractional hole area of the column but has an inversely proportional relationship with the hole diameter of the column. Results obtained have shown that the Kister and Haas; and Fair’s correlations experienced 46.38 % and 51.3 % flooding respectively. These results have shown that the performance of the column is below capacity utilization.
International Journal of Academic Research, 2012
ABSTRACT This study details the application of Gaussian dispersion phenomenon to the analysis of ... more ABSTRACT This study details the application of Gaussian dispersion phenomenon to the analysis of diffusion of pollutants formation from wick-burnt kerosene fired flame in the environment in a large evening market illuminated solely by this means. Spot measurements of three parameters at distances downwind of the plume were taken using the ITX Multigas Monitor, Multirae Plus (PMG 50) and Aerosol Mass Monitor Model GT-331; and the parameters measured were CO, SO2 and TSPM (total suspended particulate matter). The dispersion model equation of continuous buoyant air pollutant plume equation with the field data obtained produced curves in form of concentration profiles at horizontal and vertical behaviour of the generated pollutants. The correlation of the pollutants concentration from kerosene wick-burnt flame at Mile 1, Port Harcourt evening market and other evening markets in Nigeria with the Briggs phenomena and Gaussian dispersion system is fundamental in this study. Amount of pollutants emitted for one second was 0.778 g/sec. It was observed that the concentration of SO2 in all the stations was as low as 0.1 μg/m3. This confirms the point that kerosene produced from Nigerian crude is sulfur free. The effect of temperature on the pollutants shows that significant increase in concentration was observed at the 100m distance from source. There was a gradual decrease in concentration as the plume moves away from the point source for TSPM and CO, respectively. The results also show sharp angular increase in concentrations at 300m, 400m and 500m while at 100m and 200m concentrations were more or less the same for TSPM and CO. Besides temperature, climatic parameters like , wind speed and direction were also observed to influence pollutant formation and dispersion. The study concludes that the widespread use of wick-burning kerosene devices is a significant source of air pollutant and the practice should be discouraged.
IOSR Journal of Engineering, 2014
The Journal of Solid Waste Technology and Management, 2012
Process Biochemistry, 2005
Chemical and Process Engineering Research, 2018
This work involves experimental analyses on three abandoned dumpsites (Nkpolu, Oyigbo, and Elekah... more This work involves experimental analyses on three abandoned dumpsites (Nkpolu, Oyigbo, and Elekahia) in Port Harcourt to determine the concentrations of lead, cadmium, and Iron in soil and existing tap water close to the dumpsite. Model for the prediction of lead (Pb), cadmium (Cd) and Iron (Fe) migration from abandoned dumpsite into groundwater has been developed. The model was solved and validated with experimental results. Statistical analysis was performed between the experiment and model result to determine the significant difference. The model validation showed goodness fit which was further validated by statistical analysis as there was no significant difference at p<0.05. The simulation performed to determine the quality of existing groundwater obtained from taps close to the abandoned dumpsites showed that the contaminants’ concentration decreased as the depth from point source increased into the groundwater aquifer. At the 60 meters depth, the result obtained from predi...
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Videos by Awajiogak A Ujile
Papers by Awajiogak A Ujile
The formation of the Niger Delta can be attributed to a structural geological development, the interaction of the river discharges and its considerable sediment load towards coastal distributive forces, including the tidal currents in the outlets, ocean current and waves in the coastal area and the littoral drift. Perpetuation of these distributive forces (each with its own frequency) versus river discharges and sediment supply has led to building the Delta out into ocean.
The Niger Delta is characterized by a network of rivers and creeks which drain the hinterland, transporting both water and sediments to the Atlantic Ocean. This process has created an extensive sedimentary region, roughly 30,000 km2 in area and populated by roughly 35 million inhabitants. The area is also rich in hydrocarbon resources, accounting for over 90% of Nigeria’s GDP. The difficulty of physical infrastructural development was foretold by the British colonial government (Willink Minorities Commission Report (1957-58), who also advised the setting up of a special developmental commission, culminating in the creation of the NDDC.
The impact of groundwater contamination in Yenagoa was considered in the region. Yenagoa is located east of the confluence of the Nun River and the Ekole River. The Niger Delta Environmental Survey Report, which was corroborated by the author, asserted that the Niger River carries iron loadings from the deposits of the Itakpe Iron Ore and also through the processes of dispersion, advection, and inter-aquifer exchange, which move the pollutants to the groundwater aquifer. Ashim stated that most contaminants are detected sometime after entering the subsurface; weeks, months, or years may pass before the problem is noticed. Contaminants may travel a great distance and affect a large portion of an aquifer before pollution is recognized. Ashim further stated that there are so many complexities involved in groundwater quality management issues; therefore, there is a need for impact evaluation as development progresses, with adaptation of the protection strategies, policy and management taken into consideration. This may be applicable to the issues of groundwater quality management in the Niger Delta.
From the above standpoint, it becomes imperative to appraise the groundwater storage, geology, hydrogeology and aquifer systems, some pollutant distribution profiles, groundwater quality, model development and application of the model in the Niger Delta region. This chapter highlights these concepts, and makes recommendations to appropriate regulatory and governing bodies for implementation, control and management of groundwater resource for the region.