Department of Chemical Engineering
Permanent URI for this communityhttps://repository.cuilahore.edu.pk/handle/123456789/13
Browse
12 results
Search Results
Item Design & Optimization of BIOMASS GASSIFIER for production of syngas using Computational fluid dynamics(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2020) Noor UL Islam; SP18-RCH-004; Dr. Shehzad Khuram; LHR TP 5954The design of gasification of biomass and coal process is to be enhanced by simulating process parameters and methods with computer software i.e Ansys 14.5 The Properties and characteristics of fluid flow participates for optimization of process. Hence computational fluid dynamics is being used from “Ansys 14.5” Software. Gasification is one of a naturally pleasant solution and is relatively new amongst all the methods available for the manufacture of energy by consuming biomass method. By restricted oxidation, gasification is essential thermo-chemical conversion at higher temperature of carbon-based materials. Any small value carbonaceous compounds similarly biomass, fuel coke, and metropolitan waste and processing plant residues can be recycled for production of great efficiency energy with gasification. As CO2 in air absorbed carbon content of biomass due to this the left CO2 manufacture is zero, so Biomass gasification is principally CO2 neutral. The by-product is identified as syngas (combination of H2, CH4 and CO) taking an elevated fraction of H2 which makes syngas main to all fuels. Above stated causes make gasification of biomass an unexpected substitute for the creation of power and energy. Presently clean and capable source of energy is reflected as the gasification of biomass. Over Practical testing it is time intense and challenging for a FB gasifier by differing the operating settings to obtain optimum conditions. CFD modelling has manifest to be an effective option in current days because from time to time Practical experiments may not be economical and reasonable. Due to nonstop improvement of computational potential, it is capable to carry out such optimization to manage optimum operating settings and design in advance experimental optimization are carried out.Item Production of 500 metric tons/day of Nitric Acid from Ammonia by Ostwald Process(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) Hashir Arshad, FA19-CHE-012; Abdul Manan Amjad, FA19-CHE-040; Uzair Ahmad, FA19-CHE-068; Awais Afzal Sial, FA19-CHE-088; Zeeshan Sarwar, FA19-CHE-102; LHR TP 8426; Dr. Asim Laeeq KhanThis final year project report presents a comprehensive study on the production of 500 metric tons per day of nitric acid through the implementation of Ostwald's process using ammonia as the primary feedstock. The report provides a detailed analysis of the process flow, reaction kinetics, equipment design, and optimization techniques employed to achieve the desired production capacity. Additionally, the project explores the environmental impact of the nitric acid production process and proposes innovative strategies for minimizing waste and maximizing resource efficiency. The findings of this report contribute to the understanding and advancement of industrial-scale nitric acid production, providing valuable insights for the chemical engineering community and facilitating sustainable practices within the chemical manufacturing sectorItem Gas Sweetening Unit to Sweet 200 MMSCFD of Natural Gas(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) Muhammad Azeem (FA19-CHE-031); Ahsan Sadiq (FA19-CHE-041); Ali Hamza (FA19-CHE-043); Ahsan Shawal (FA19-CHE-049); M Azeem Saleem (FA19-CHE-099); LHR TP 8421; Eng. Javaid AhmadIn oil and gas industry gas sweetening process is inevitable when raw natural gas contains acid gasses like H2S and CO2 removal of these acid gases is essential since their presence poses severe corrosion problem to the downstream process lines and equipment. In our project raw natural gas first goes in separator where the water content removed further gone in absorber where amine and that gas react sweet gas goes upward and collected from the top of absorber while the rich amine further process to recover all the amine to reduce operation cost. First of all, we design process flow diagram and select suitable equipment for this process. As we need to calculate different parameter apply material and energy balance on all equipment our target is 200 MMSCFD so we need to fix our mass of feed. After that design all equipment on the basis of our material and energy requirements. In every process we need to apply control loop to run process smoothly, apply control loop on every single equipment. One most important thing is cost of the plant, what is capital cost and what is operation cost? Apply cost estimation.Item Flue-Gas Treatment From The Combustion of 1.9 million Tonnes/year Coal Containing High Sulphur, Nitrogen and Carbon Contents(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) M. Uzair Imran (FA19-CHE-033); Mustafa Adil Asad (FA19-CHE-067); Daud Rafique (FA19-CHE-087); Jazim Hussain Khan (FA19-CHE-091); Haroon Rasheed (FA19-CHE-095); LHR TP 8420; Dr. Wajeeh-Ur-RehmanFlue gases produced by combustion of coal containing high Sulphur and nitrogen is processed and cleaned for its safe exit to the environment to reduce the adverse effects of SOx, NOx, and CO2. To do so, coal analysis of Thar (Pakistan) is done because of its high Sulphur and nitrogen content. Flue gases that leave the Combustion chamber are passed through the Selective Catalytic Reduction Reactor (SCR) where NOx reduction occurs with ammonia water and outlet of SCR goes through the heat exchangers to drop the temperature. Then it is Desulfurized in scrubber which uses lime slurry (CaCO3) for the removal of SOx. It also gives gypsum as a by-product which is by cement industry. CO2 is absorbed with Mono Ethanol Amine (MEA) in the absorber. Clean gas is set free to the environment from the top. By absorbing CO2 MEA becomes rich MEA, to make process economical rich MEA is regenerated which is done by using a stripper column. From which MEA is regenerated by boiling. CO2 from top of the column is delivered to storage and lean MEA is cooled down using a heat exchanger and cooler then sent back to the absorber.Item 100 bbl/Day Biodiesel Production From Waste Cooking Oil Using Cow Bones As Catalyst(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) HUSHAM AMER CHAUDRY (FA19-CHE-015); SAROSH ALI KHOKHAR (FA19-CHE-017); HASHIM ABBASI (FA19-CHE-035); SYED SIKANDAR ALI (FA19-CHE-061); ABDULLAH BIN FARHAN (FA19-CHE-101); Dr. Shahzad KhuramThis plant design report contains the process and design feasibility for producing biodiesel at a rate of 100 bbl/day from waste cooking oil using cow bones as catalysts. The plant can fulfill the 10% of the need for diesel in demand in the city. Our biodiesel is the product of the transesterification process of waste cooking oil in the presence of Methanol and calcined cow bones as catalysts. The basis of the process is the 100 bbl/day biodiesel production. This thesis consists of a chapter on introduction, process selection and description, material balance, energy balance, equipment selection and design, instrumentation, process control, HAZOP analysis, cost estimation, and site selection. A brief process flow sheet can be seen at the beginning of the report. The general form of transesterification reaction is: (Waste Cooking Oil + Methanol) (Glycerin + Biodiesel) Reactor feed contains waste cooking oil, Methanol, and calcined cow bones at 900, ℃ are used as a catalyst to catalyze the reaction for transesterification. The overall conversion of the process is 97%. The reaction is endothermic. A heating water jacket is installed in the reactor to maintain the temperature at 65 ℃, our reaction temperature.Item Catalytic Supercritical Water Gasification of Biomass for Hydrogen Production(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2024) Ali Ahsan; FA22-RNE-003; Dr. Murid Hussain; LHR TP 9306With a focus on rice husk, this study explores the possibilities of supercritical water gasification (SCWG) for the effective synthesis of hydrogen from biomass. Compared to conventional fossil fuels, biomass is a possible substitute, and SCWG provides an energy- and environmentally friendly method of producing hydrogen. The need to maximize catalytic efficiency and reduce this process's environmental impact is what motivates the study. The main focus is on Ni/eggshell catalysts, with the goal of filling up important information gaps about catalytic activity, stability, and the generation of clean hydrogen from biomass sources that are renewable. This research assesses the performance of Ni/eggshell catalysts in biomass SCWG and seeks to establish the suitable working conditions that would yield the highest levels of hydrogen with negligible levels of by-products. The catalyst synthesized with three loadings (5 wt%, 10 wt%, and 20 wt%) in the production of hydrogen in SCW at three different temperatures (370°C, 450°C, and 500°C) and two residence time (60 minutes and 80 minutes) Also, it reviews the Ni/eggshell catalysts in the aspects of activity, stability, and impact on the environment in SCWG. Ni/eggshell proved to be very active in SCWG of rice husk biomass especially with moderate loading of Ni, (10 wt% provided adequate active sites with least chance of particle sintering). According to the experiments, the best conditions for hydrogen production were the temperature 500°C; the residence time of 80 minutes, and the catalyst loading of 10 wt%. These conditions gave the highest gas yields and hydrogen content, and the least solid residues implied that the biomass was almost fully converted. The SEM and XRD studies revealed that there are no morphological changes, and the Ni particles were effectively dispersed and uniformly distributed on the CaO support, thus the catalytic activity was constant. According to the obtained FTIR and XRD results, the catalyst was stable in the course of the reaction.Item Production of Hydrogen Rich Gas Through the Process of Steam Reforming: An Experimental and Simulation Study(Library Information Services, COMSATS University Islamabad, Lahore Campus., 2025-04-01) Muhammad Zain Feroz; CIIT/FA23-RNE-008/LHR; Dr. Um-e-Salma Amjad; LHR TP 9677The objective of this research is to produce Hydrogen, a clean source of energy, through the steam reforming process, from hydrocarbons as feedstock. It emphasizes the development of catalysts that are capable of addressing the challenges of stability and efficiency. This study focuses on the use of tools like DWSIM to determine the operating conditions for enriched hydrogen yield. The research involves catalyst synthesis through the combustion synthesis method to synthesize different catalysts. This method involves using a vaporizer and reactor setup at controlled temperature and pressure. Whereas, after the SR process, the gas composition of the product will be analyzed through the use of a gas analyzer. It will shed light on the efficiency of the process and trace impurities in the product gas. The research focuses on reducing the oxides of carbon in the final product for maximum hydrogen production and to comply with global carbon emission standards.Item Development of Functional Materials for Energy Harvesting Devices(Library Information Services, COMSATS University Islamabad, Lahore Campus., 2025-04-01) Mubashra Mushatq; CIIT/FA23-RNE-010/LHR; Dr. Maria Mustafa; LHR TP 9679The need for new materials with enhanced functionality, structural stability, and energy conversion efficiency has increased due to the growing need for renewable energy solutions. Functional energy materials because of their large surface area, adjustable porosity, find their versatility in various applications, such as sensors, energy storage, and energy harvesting devices. The thesis work will explore and optimize the importance of the development of advanced functional material on energy harvesting devices, i.e., triboelectric nanogenerator (TENGs) to address the increasing demands of efficient and sustainable renewable energy sources. The research lies in the synthesis of Zeolitic Imidazolate Framework-67 (ZIF-67), Polyvinylidene Fluoride (PVDF), and Sodium Niobate (NaNbO3) materials owing to their large surface area, controllable porosity, and sturdiness to facilitate energy conversion performance. Such materials were reduced to form thin films by careful manufacturing methods, e.g. electrohydrodynamic (EHD) spray deposition, drop casting, etc. and inserted within TENG devices with aluminum and copper electrodes to maximize charge transfer and surface functionality. To explore the materials structural, optical, and electrical properties, UV-Vis spectroscopy, FTIR, SEM, and I-V measurements were performed in order to achieve thorough characterization of the materials as they would be used in energy applications. Tests determined that performance of TENGs with these functional materials were much greater than those of a baseline as the NaNbO3 -PVDF system showed an outstanding power generation owing to its piezoelectric and ferroelectric characteristics. Nevertheless, compatibility issues of the material were found at ZIF-67/NaNbO3 composite, which supports the idea of making a strategic selection of material. These results suggest the opportunities of custom functional materials to instruct energy harvesting technologies, which can provide scalable and sustainable energy supply of flexible electronics, sensing and energy storage.Item Fabrication and Performance Evaluation of Polyaniline-Based Composites within a Sandwich Structure Device for Flexible Electronics Application(Library Information Services, COMSATS University Islamabad, Lahore Campus., 2025-04-01) Sohail Ahmad; CIIT/FA23-RNE-009/LHR; Dr. Abrar Faisal; LHR TP 9678This study describes the manufacturing and characterization of polyaniline (PANI) based composites targeted at flexible electronics and their application in a sandwich style device architecture. The fundamental methodology was the production of conducting PANI and PANI-Bismuth Ferrite composite by a chemical oxidative in-situ polymerization technique. These synthesized powders were further processed into stable and processable conductive inks, N-Dimethylformamide (DMF) as the solvent, and polyethylene glycol (PEG) and sodium silicate being used as binders and stabilizers. In order to measure electrical performance, a flexible copper and aluminum substrate was electrolessly deposited with these inks to form a sandwich-structure device to be used as an active layer placed between conductive contacts. The FTIR results established the achievement of the production of PANI along with its composite with BiFeO3. A characteristic movement of functional groups meant that BiFeO3 and PANI interacted heavily on the composite structure. All three pure components as well as the final composite were characterized fully using current-voltage (I-V) characterization. The I-V analysis confirmed a non-linear, semiconducting type of PANI and amplified a discrete rectifying, diode like characteristic of the BiFeO3. More importantly, the PANI-BiFeO3 composite had a characteristic non-linear, asymmetric I-V curve, which is an indication of successful functional combination. This was supported more by optical analysis using UV-Vis spectroscopy and Tauc plots to get band gaps of PANI, BiFeO3, and a different one was a modified 2.83 eV in the composite.The combination of all results justifies the PANI-BiFeO3 composite as an ideal candidate in the development of workable and bendable electronic components and has laid a scale-dependent production path in addition to providing initial insights regarding the electro-optical behavior which will be useful in the design of flexible sensors, energy storage, and portable devices.Item Developing A Novel Method for H2O2 Production via Integration of Photocatalysis and Underwater Friction(Library Information Services, COMSATS University Islamabad, Lahore Campus., 2025-04-01) Muhammad Yasir; CIIT/FA23-RNE-007/LHR; Dr. Fahad Rehman; LHR TP 9676Hydrogen peroxide (H2O2) is a commodity chemical, an environmentally friendly oxidant and difficult to synthesize commodity chemical, but its production in industry is restricted to a hazardous, energy-intensive, anthraquinone auto-oxidation (AO) process, which is economically feasible only when used inexpensively at large scales and is highly waste producing in terms of organic products. This semicentral model of production requires a transport of highly concentrated, and therefore dangerous, H2O2 solutions. This thesis proposes a new direction and a decentralized method towards the sustainable production of hydrogen peroxide through synergistic combination of photocatalysis and underwater mechanical energy, i.e. friction and sonication to tackle these economic, environmental and safety issues. The proposed methodology does not need the hazardous chemical inputs, and it is conducted in ambient conditions. The essence of the research work was in uniform study of a composite system in suspension (glass powder, or quartz, and polytetrafluoroethylene, or PTFE, particles in water), which undergoes both UV treatment and intense probe sonication. The synergetic mechanism assumed in the study is as follows: photocatalysis of the semiconductor material itself would transform to the electron-hole pair generation process, and mechanical energy addition would play several important roles (1) stimulating the process of charge separation and migration, including the triboelectric effect, and the piezoelectric effect on the surface of the material; (2) producing more radical precursors (or •OH) owing to sonolysis and acoustic cavitation; and (3) creating active surfaces and reducing mass transfer limitations occurring continually. To maximize the process a complete parametric study was made that would analyze the effects of various material concentrations, reaction time, temperature and the effect of sonication itself in a systematic manner. Conclusively, the results indicate that H2O2 was successfully produced, and a yield of sufficient increase was realized when sonication was added, which is the apparent validation of the proposed synergistic effect of improvement. The best conditions were found, and the process had shown a high degree of reproducibility, which proves the advantageousness of the practice. Successfully developed a novel, dual-energy ix system for sustainable H₂O₂ production, achieving a maximum yield of 5.48 mgh⁻¹cm⁻² under optimized conditions (120 min, 25g glass + PTFE, 22-26°C). The present work presents the main concept of a novel dual-energy target design that uses the forces of both light and mechanical energy as a source of chemical synthesis. The results mark a milestone in the establishment of green, on-site, and on-demand technologies of producing H2O2 and the potential applications that utilize this concept are monumental like water treatment and disinfection.