Ahmed Abotaleb

Verified

Ahmed verified their affiliation via an institutional email.

Learn more

Verified

Ahmed verified their affiliation via an institutional email.

Learn more

• Doctor of Engineering
• Researcher at Hamad bin Khalifa University

Metal–organic frameworks (MOFs) have emerged as versatile materials with remarkably high surface areas and tunable properties, attracting significant attention for various applications. In this work, the modification of a UiO-66 MOF with metal nanoparticles (NPs) is investigated for the purpose of enhancing its photocatalytic activity for CO2 reduc...

Spent catalysts represent a significant source of metal-containing waste, posing both environmental and economic challenges in their disposal. Repurposing these spent catalysts offers a sustainable solution by reducing waste and recovering valuable metals, which can be reused in other industrial catalytic applications. This study explores the reuse...

Spent catalysts are a significant source of metal-containing waste, and their disposal can pose environmental and economic challenges. Recycling these spent catalysts can not only reduce waste but also recover valuable metals, which can be used as raw materials for synthesizing new catalysts, as well as produce substrates for other industrial catal...

Friction Stir Welding (FSW) has emerged as a prominent technique for joining metallic materials, offering advantages in both similar and dissimilar material combinations. Despite its effectiveness, further advancements are needed to address industry demands and enhance the understanding of the FSW process. Welding nickel-based superalloys like Inco...

Halloysite nanotubes (HNTs) are naturally occurring aluminosilicate minerals, known for their unique tubular structure, which have garnered significant interest for a wide range of applications. This study explores the morphological changes of HNTs when subjected to thermal treatment ranging from 25 °C to 1100 °C using a combination of experimental...

Spent catalysts are a significant source of metal-containing waste, and their disposal can pose environmental and economic challenges. Recycling these spent catalysts can not only reduce waste but also recover valuable metals, which can be used as raw materials for synthesizing new catalysts, as well as produce substrates for other industrial catal...

Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH4 and CO2 to syngas (H2 and CO). From an industrial perspective, nickel (Ni)-supported catalysts have been deemed among the most suitable catalysts for DRM owing to their low cost and high activity compared t...

Hydration of carbon dioxide in water solution is the rate limiting step for the CO2 mineralization process, a process which is at the base of many carbon capture and utilization (CCU) technologies aiming to convert carbon dioxide to added-value products and mitigate climate change. Here, we present a combined experimental and computational study to...

In this work we present a novel approach to enhance energy efficiency in cooling intake air for air conditioning (AC) systems in harsh environments using geothermal energy. We developed a 3D finite element model to simulate the heat transfer between underground soils/gravels and cooling pipes, which effectively precools intake air before it enters...

The food security challenge continues to be one of the main issues that currently face the world despite improved economic development in many countries. The challenge is particularly unique in one of the world’s arid regions, the Gulf Cooperation Council (GCC). This paper analyses the food security strategies of Qatar (one of the six countries tha...

Characterized by high temperatures, strong solar radiation, and prolonged sunshine hours. Air-conditioning (AC) is a necessary component for comfortable living, accounting for up to 70% of residential electricity load. With high consumption, abundant solar resources, and the country's commitment to sustainable solutions, rooftop photovoltaics (PV)...

Green fuels are derived from renewable resources that can replace or reduce the use of fossil fuels, and they can help reduce carbon emissions and dependence on finite resources including oil and natural gas. This review reports the latest investigations and studies on methane and carbon dioxide photocatalysis as well as nitrogen fixation for the p...

As global energy demand keeps rising, natural gas is meant to be the main protagonist of the clean energy transition, with increasingly importance in power generation and production of chemicals. However, the presence of contaminants in the raw gas, such as H2S and CO2, is the cause of several operational and technical issues ranging from equipment...

Sulfur oxidative coupling of methane (SOCM) has seen a significant improvement in catalyst design and performances, but there is still a lack of development at process level. We propose an optimized SOCM process flow diagram, with integrated waste heat recovery system and an efficient separation technique. The outcomes of the simulated process were...

In arid climates such as that of the Middle East, asphalt concrete/pavements undergo several fluctuations in their temperature profiles, which induces large dark surface areas with intensive heat absorption capacities. This phenomenon heats roads up to 80 °C or more during the summer, causing an urban heat island that negatively affects the lifetim...

This work presents an improved evaporator design of the Multi Effect Distillation (MED) to minimize the thermal losses and footprint of the evaporator. An advanced modular MED pilot plant has been installed with a nominal capacity of 25 m³/day to validate the concept under a seawater salinity of 57,500 ppm (Dukhan Coast, West of Qatar), at the top...

The combined acid gas removal and water filtration system (10) removes sour gases, such as hydrogen sulfide (H2S) and carbon dioxide (CO2), from an input gaseous hydrocarbon stream (FG), as well as producing purified water (TW). The acid gas removal system (10) has a contactor (12) for contacting the input gaseous stream (FG) with an absorption liq...

The need to chemically convert CO2 at the interface of aqueous amine solutions has become particularly relevant for the development and the broad distribution of cost-effective and near-future devices for direct air capture working at low (e.g., ambient) partial pressure. Here, we have determined the stability of a CO2-monoethanolamine zwitterion a...

Seawater desalination and water purification is a sustainable solution for arid areas, where the lack of natural potable water is limiting economic growth. Some of the commercial multi-effect distillation (MED) configurations are classified according to the vapor box location with reference to the evaporator tube bundle; whether it is side or back-...

Carbon dioxide scrubbing by aqueous amine solution is considered as a promising technology for post-combustion CO2 capture, while mitigating climate change. The lack of physicochemical details for this process, especially at the interface between the gas and the condensed phase, limits our capability in designing novel and more cost-effective scrub...

A novel integration between Acid Gas Removal (AGR) and Forward Osmosis (FO) regeneration system is proposed to reduce the energy consumption in both systems: in the AGR and FO regeneration unit. This process utilizes Ethanol (EtOH) as a draw solution coupled with n-pentane as a low boiling point agent. A low boiling point light hydrocarbon immiscib...

Thermal desalination still considered as a reliable technology, where the seawater characteristic is challenging in terms of high salinity, elevated temperature and high impurity level especially in the Gulf seawater case. Multi-effect distillation (MED) is an efficient thermal process for the commercial and large-scale desalination plants. Even th...

Novel AGR-EOR Compression Integration for Process Optimization Abdukarem Amhamed* and Ahmed Abotaleb, Qatar Environment and Energy Research Institute (QEERI) Summary In this work we aim to enhance the sour-gas loading in acid-gas removal (AGR) systems, maximizing oil-production rate at the tertiary phase and enhanced oil recovery (EOR), and mit...

In this paper, the reliability of copper indium gallium selenide (CIGS) photovoltaic (PV) technology under high temperature, high soiling rate and high UV exposure conditions of Doha (Qatar) was studied. Thin film delamination was found to be the main dominant failure mechanism that affects the module performance and reliability for CIGS modules in...

Bifacial silicon Photovoltaic (PV) technology has the advantage of generating more energy output as compared with the conventional mono-facial technology. In this paper, a comparison is made between the performances of two bifacial silicon heterojunction modules mounted at two configurations under Qatar's climatic conditions: a tilt angle of 22° fa...

Modeling the diffusion of residential solar photovoltaic (PV) systems in their social, political and economic context is crucial to help policymakers assess which policies may best support adoption. Current models of renewable energy adoption [1, 2, 3, 4] assume regulatory and incentive frameworks that do not apply to Gulf Cooperation Council (GCC)...

Qatar Environment and Energy Research Institute (QEERI) at Hamad Bin Khalifa University (HBKU) and Qatar Electricity and Water Corporation (QEWC) took initiative to improve the perfomance of thermal desalination plants in Qatar since most of the exisiting desalting plants, built by QEWC, are of thermal type. In this work, second part of high perfor...

Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU) and Qatar Electricity and Water Corporation (QEWC) took initiative to improve overall efficinecy and perfomance of thermal deslaintion plants in Qatar. In this work, a high performance and novel Multi Effect Distillation (MED) system is developed to minimiz...

Operation of solar photovoltaic (PV) systems under high temperatures and high humidity represents one of the major challenges to guarantee higher system's performance and reliability. The PV conversion efficiency degrades considerably at higher temperatures, while dust accumulation on PV module together with atmospheric water vapor condensation may...

Amine scrubbing with absorption and desorption is the most established technology for Acid Gas Removal (AGR) systems, but suffers from high regeneration energy requirements and, hence offers a good opportunity for more development. A simulation study has been carried out based on a local NGL plant data to evaluate the performance parameters for AGR...

In hot regions like the Middle East, the road asphalt pavement experience many fluctuations in their temperature profile that provides the large dark surface area with intensive heat absorption capacity, which warms the roads up to 75°C or more in summer. This phenomenon is negatively affecting the performance and urban heating. On the other hand,...