Ibrahim Al-Mutaz
King Saud University, Chemiacl Eng. Dept., Faculty Member
- Ibrahim S. Al-Mutaz PhD from Yale University on May 1985 Professor of Chemical Engineering, King Saud University Pro... moreIbrahim S. Al-Mutaz PhD from Yale University on May 1985
Professor of Chemical Engineering, King Saud University
Prof. Ibrahim S. Al-Mutaz has since 1979 academic and professional experience in desalination and water treatment field. He acted as part time consultants with Riyadh Water Authority, where he led various some practical filed projects and conducted many technical reports. He has published more than 50 papers on desalination and water treatment.
Prof. Al-Mutaz is a member of the Editorial Board of Desalination Journal, Elsevier and International Journal of Nuclear Desalination, lnderscience. He is also is a member of the IDA and member of the foundation Committee of the Arab Water Council. He was member of the executive Committee of Prince Sultan Research Center for Environment, Water and Desert as well as various scientific and professional societies; such as IChemE (England), AIChE (USA), CSChE(Canada), ACS (USA), AWMA (USA), and others.
Prof. Al-Mutaz areas of expertise include but not limited to the following: Modelling and Simulation of Desalination Processes, Optimization of Desalination Processes, Hybrid Desalination Processes, Optimum Production of Water and Power, Nuclear Desalination.
Further details about his work history and involvement in the desalination can be found at web-site: http://faculty.ksu.edu.sa/almutazedit
Research Interests:
Research Interests:
Research Interests:
ABSTRACT Multi-effect evaporation with thermal vapor compression (MEE-TVC) is one of the most effective desalination method. It plays a vital role in the production of freshwater in many regions of the world especially in the Arabian... more
ABSTRACT Multi-effect evaporation with thermal vapor compression (MEE-TVC) is one of the most effective desalination method. It plays a vital role in the production of freshwater in many regions of the world especially in the Arabian countries. A steady-state mathematical model of MEE-TVC system and its solution procedure are developed based on the basic laws of material balance, energy balance and heat transfer equations with correlations for physical properties estimation. The influence of important design and operating variables on the performance of the plant is investigated. These parameters include number of evaporation effects, motive steam pressure, top brine temperature, temperature difference across effects and feed water temperature. The purpose of this paper is to develop a mathematical model of the MEE-TVC systems and compare the results with the existing plants. A MATLAB program is also used to solve the model equations. The model validity is examined against some commercial MEE-TVC systems. Good agreement is obtained between data of these systems and model predictions.
Research Interests:
Air pollution problem at Riyadh Refinery is discussed as well as its potential dangerous to the nearby populace. Sulphur dioxide is the main air pollutant in the refinery. There are no apparent environmental problems with any other air... more
Air pollution problem at Riyadh Refinery is discussed as well as its potential dangerous to the nearby populace. Sulphur dioxide is the main air pollutant in the refinery. There are no apparent environmental problems with any other air contaminates. The main source of sulphur dioxide emission is the hydrogen sulphide incenarator unit. Results of previous UOP study is discussed along with the possible solution for this severe air pollution problem in the refinery.
Research Interests:
Some operational changes can be made for immediate reduction of lead concentration of gasoline that require no capital investment. For a further lead reduction, installing new refinery units and/or modifications to existing ones are... more
Some operational changes can be made for immediate reduction of lead concentration of gasoline that require no capital investment. For a further lead reduction, installing new refinery units and/or modifications to existing ones are required. The production of unleaded gasoline in the Riyadh refinery required improvement of the clear research octane number (RON) of light naphtha, light isomerate and reformate. However, only a once-through isomerization unit is needed if MTBE blending is planned. The paper describes how the Riyadh refinery in Saudi Arabia phased lead from their gasoline production.
Research Interests:
ABSTRACT The forecast of long-term water demand is important for the planning of future requirements for water supply, distribution, and wastewater systems. The forecast is particularly important for arid countries such as Saudi Arabia... more
ABSTRACT The forecast of long-term water demand is important for the planning of future requirements for water supply, distribution, and wastewater systems. The forecast is particularly important for arid countries such as Saudi Arabia which rely on costly desalination plants to satisfy the growing water demand. This study develops a model for forecasting water demand for Riyadh city, the capital of the country. The development of a sound forecast model is complicated by the uncertainties associated with key factors, such as the population growth and the economic activity, which is largely dependent on fluctuating oil prices. The forecast is also made difficult by the inefficient management of unaccounted-for-water (UFW). All these factors limit the usefulness of any deterministic forecast model. This paper develops a probabilistic forecast model that incorporates explicitly the uncertainties associated with population growth, household size, household income as well as conservation measures, and UFW management. The methodology makes use of historic time series records of water consumption to forecast the future demand, and applies the Monte Carlo sampling to describe the associated uncertainties. Results show that future water demand in the city is governed equally by socioeconomic factors and weather conditions. The study also illustrates the importance of conservation measures and the need for reduction of UFW.
Research Interests:
ABSTRACT Saudi Arabia is one of the richest countries in energy resources especially in Solar Energy. On an average, the 2 million square kilometers of mostly desert lands of Saudi Arabia receive 5000 Kcal/m2 every day of solar energy. If... more
ABSTRACT Saudi Arabia is one of the richest countries in energy resources especially in Solar Energy. On an average, the 2 million square kilometers of mostly desert lands of Saudi Arabia receive 5000 Kcal/m2 every day of solar energy. If this enormous amount of energy is economically and efficiently utilized it will be considered then as a major source of useable energy. However, Saudi Arabia is planning to develop the solar technology for the best utilization of solar radiation. This paper will discuss the available solar energy collected in Saudi Arabia as well as their potential uses. Conventional utilization of solar energy such as water heaters, room heaters, agriculture, drying and desalination will be mentioned together with recent solar energy uses in electrical power and hydrogen production from water. The current fundamental researches in the country will also be discussed.
Research Interests:
Research Interests:
AbstractMulti-effect desalination with thermal vapor compression (MED-TVC) is particularly more attractive than other thermal desalination systems due to its low energy consumption. One of the major component of MED-TVC desalination... more
AbstractMulti-effect desalination with thermal vapor compression (MED-TVC) is particularly more attractive than other thermal desalination systems due to its low energy consumption. One of the major component of MED-TVC desalination system is thermo-compressor. The overall efficiency of the system is directly influenced by the performance of thermo-compressor. It enhances system’s efficiency by reducing the energy consumption. The location of the steam extraction has a great effect on the performance of the MED-TVC plants. Higher gained output ratio of the desalination plant can be obtained at the optimum position of vapor extraction in the MED-TVC system. The optimization of location of suction position of thermo-compressor in MED-TVC desalination plants could result in maximization of gain output ratio (GOR) and consequently reduction in energy consumption. Furthermore, increasing the suction pressure also results in decreasing the energy consumption of the system. Therefore, this work will analyze the ...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
The general objective of this study is to explore the suitability and performance of the adsorption-membrane filtration (AMF) hybrid process technology for boron removal from seawater and/or RO first stage permeate.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
This paper describes a mathematical model for predicting the mass of water vapor generated in micro-explosion. First, a single droplet experiment was carried out. A W/O (water/oil) emulsified fuel droplet suspended by a thermocouple was... more
This paper describes a mathematical model for predicting the mass of water vapor generated in micro-explosion. First, a single droplet experiment was carried out. A W/O (water/oil) emulsified fuel droplet suspended by a thermocouple was heated by a halogen spot heater, and micro-explosion was observed using a high-speed video camera. The progress of the coalescence of the dispersed water droplet was observed while droplet was heated, and an aggregated water droplet was formed in the oil layer. Based on the measured micro-explosion characteristics, a mathematical model for predicting water vapor mass generated in micro-explosion was proposed. The size of the aggregated water droplet just before micro-explosion was measured to verify the proposed mathematical model. Under certain assumptions, mass and energy conservation equations were applied to micro-explosion process, and an equation to calculate water vapor mass generated in micro-explosion was derived. The derived equation and some measurement results provide enough information to calculate water vapor mass generated in micro-explosion. The calculated diameter of the water droplet, which changed to vapor in micro-explosion, was compared to that of the aggregated water droplet just before micro-explosion. The calculated results roughly agreed with experimental ones, and the validity of the proposed model was verified.
Research Interests:
Abstract: Twice-daily mixing heights, one morning and one afternoon were calculated by using the computational program MIXHTS. MIXHTS utilizes the meteorological data collected from the King Khalid International Airport (KKIA) surface and... more
Abstract: Twice-daily mixing heights, one morning and one afternoon were calculated by using the computational program MIXHTS. MIXHTS utilizes the meteorological data collected from the King Khalid International Airport (KKIA) surface and upper air stations in ...
Research Interests: Environmental Science, Remote Sensing, Climate Change, Atmospheric Science, Climatology, and 14 moreMeteorology, Saudi Arabia, Air pollution, Sea Level, Atmospheric sciences, Data Collection, Urban Environment, Computer Program, Riyadh, Air Temperature, Morning, Wind Speed, Urban Area, and surface temperature
Research Interests:
This paper is concerned with the technical and economic aspects of the soda ash production in the Arabian Gulf. Five different manufacturing methods are outlined. The two main manufacturing methods (the Solvay and Dual processes) are... more
This paper is concerned with the technical and economic aspects of the soda ash production in the Arabian Gulf. Five different manufacturing methods are outlined. The two main manufacturing methods (the Solvay and Dual processes) are examined in detail. The technical aspects regarding the raw material quantitative and qualitative requirements, the battery limits plant production units and utility requirements are specified in each case. A preliminary economic evaluation of each of these two processing routs concludes that soda ash production by either route is competitive with imported soda ash assuming full marketability of soda ash and its by-products in the Arabian Gulf and neighbouring regions. The Solvay and Dual processes are estimated to produce soda ash at a cost of 132 and I44 $/ton respectively. These production costs compare favourably against delivered costs of imported soda ash of 177 $/ton.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Automobiles, power stations, oil refinery and cement plant are the major sources of air pollution in Riyadh. This paper highlihgts those major sources of air pollution and presents the available monitoring emission data concerning... more
Automobiles, power stations, oil refinery and cement plant are the major sources of air pollution in Riyadh. This paper highlihgts those major sources of air pollution and presents the available monitoring emission data concerning concentrations of hydrocarbons, carbon monoxide, nitrogen oxide, lead compounds as well as particulates.
Few changes in the petrochemical industry in the Saudi Arabia are likely through the early 1990s. Although the country produces substantial quantities of petrochemicals, products are limited to those that can be most economically produced... more
Few changes in the petrochemical industry in the Saudi Arabia are likely through the early 1990s. Although the country produces substantial quantities of petrochemicals, products are limited to those that can be most economically produced from natural gas-based feedstocks. Heavy reliance on natural gas-based feeds means that the Saudi industry produces mainly olefins and olefins derivatives. Thus, other important products, in particular aromatics derivatives, cannot be economically produced.
Research Interests:
The flue gases from the combustion of fuels are considered as the main source of air pollution. Incomplete combustion yields dangerous air pollutants. In automobiles, combustion of large amounts of fuel takes place everyday usually in an... more
The flue gases from the combustion of fuels are considered as the main source of air pollution. Incomplete combustion yields dangerous air pollutants. In automobiles, combustion of large amounts of fuel takes place everyday usually in an incomplete condition. Since electron emission is sensitive to the presence of carbon and oxygen, thermionic emission from platinum can be used to monitor the combustion status. A report on automobile air pollution is given and the different sensors used to monitor combustion completeness are discussed. The suggested thermionic emission sensor is then presented as a tool to detect the unburned hydrocarbons and indicate the deviation from the optimum air-fuel ratio to achieve complete combustion.
Research Interests:
Automobiles are the main source of air pollution. Carbon monoxide, nitrogen oxide s, unburned hydrocarbon s and lead compounds are emitted in large quantities from automobiles. Automotive air pollutants account for about 90% of the total... more
Automobiles are the main source of air pollution. Carbon monoxide, nitrogen oxide s, unburned hydrocarbon s and lead compounds are emitted in large quantities from automobiles. Automotive air pollutants account for about 90% of the total air pollutant s especially in developing countries where chemical industries are still lagging. Most of automotive pollutants are formed by incomplete combustion of gasoline in the combustion chamber. Anyhow, if this major source of air pollution is minimized better environmental benefits will be gained. Thermionic emission from platinum for example provides good monitoring for combustion completeness due to its rapid response to the metal surface c conditions. This paper will present the general guidelines for the use of thermionic emission for monitoring the fuel combustion based on the exhaust gas composition. This will possibly lead to the design of a novel automobile pollution thermionic emission-based sensor.
ABSTRACT Arabic
Gasoline in Saudi Arabia was produced by the addition of the maximum allowable limit of lead compounds. It is used mainly as fuel in automobiles. It was produced in two grades, regular and premium. No low-lead or non- leaded gasoline is... more
Gasoline in Saudi Arabia was produced by the addition of the maximum allowable limit of lead compounds. It is used mainly as fuel in automobiles. It was produced in two grades, regular and premium. No low-lead or non- leaded gasoline is produced currently. However, the production of regular gasoline is now terminated. This raises the average lead content of the produced gasoline from 0.60 to 0. 72 g/L. Recently, Saudi 's refineries study the reduction in the gasoline lead level to a maximum of 0 .60 g/L. It could be reduced to 0.40 g/L by operational changes in the existing refineries. A further reduction to 0.31 g/L would require the MTBE blends for the production of only one grade, premium gasoline. In this paper the ability of Riyadh refinery for the production of low-lead and lead-free gasoline is discussed. The Saudi plan for lead phasedown in the domestic refineries i s reviewed as well as the environmental impact on the Saudi environment.
Research Interests:
Modification of Darcy's law for the laminar flow of non Newtonian fluids through porous media is applied to describe the flow behavior of Saudi waxy oils. The rheological behavior was describe well by the Herschel-Bulkley Model.... more
Modification of Darcy's law for the laminar flow of non Newtonian fluids through porous media is applied to describe the flow behavior of Saudi waxy oils. The rheological behavior was describe well by the Herschel-Bulkley Model. Experiments in packed bed of glass beads were carried out with solutions of paraffin wax in base oils from Riyadh refinery. Experimental results were presented in the form of Kozeney-Cerman type equation. The modified friction factor Reynolds number correlation presented here fitted the experimental data adequately.