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- 저자 : Patah, Aep (검색결과 3 건)
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Zulhelmi Amir,Ismail Mohd Saaid,Badrul Mohamed Jan,Muhamad Fazly Abdul Patah,Munawar Khalil,Wan Zairani Wan Bakar 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.3
Polymer gel has been established as a water shut-off control agent for improved oil recovery. The role of the polymer gel in conformance control is to divert injected water from high permeability to low permeability zones of the reservoir. This paper presents a series of core flooding tests performed to investigate the propagation, blocking capability, permeability reduction and diverting performance of various mixtures of polymer gels at simulated reservoir condition. In this particular study, a core flooding scheme with crossflow effect using composite core has permeability contrast. Core flooding test with crossflow effect simulates reservoirs with communication between reservoir permeability layers. Experimental results show that PAM/PEI polymer gel reinforced with solid silica NP has been proven to provide satisfactory gel strength to divert water flow, thus recovering an additional 24% of oil. This reinforced PAM/ PEI polymer gel tends to recover more trapped oil compared to weakened PAM/PEI polymer gel without solid particles. These results give better understanding and provide additional knowledge of strengthening gel by addition of solid particles, which could be the remedy for the weakened polymer gel.
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Wijaya, Karna,Pratika, Remi Ayu,Fitri, Edhita Rahmawati,Prabani, Prisnu Fadilah,Candrasasi, Yufinta,Saputri, Wahyu Dita,Mulijani, Sri,Patah, Aep,Wibowo, Arief Cahyo Materials Research Society of Korea 2022 한국재료학회지 Vol.32 No.3
Effect of sulfation processes on the physicochemical properties of ZrO<sub>2</sub> and TiO<sub>2</sub> nanoparticles were thoroughly investigated. SO<sub>4</sub>/ZrO<sub>2</sub> and SO<sub>4</sub>/TiO<sub>2</sub> catalysts were synthesized to identify the acidity character of each. The wet impregnation method of ZrO<sub>2</sub> and TiO<sub>2</sub> nanoparticles was employed using H2SO<sub>4</sub> with various concentrations of 0.5, 0.75, and 1 M, followed by calcination at 400, 500, and 600 ℃ to obtain optimum conditions of the catalyst synthesis process. The highest total acidity was found when using 1 M SO<sub>4</sub>/ZrO<sub>2</sub>-500 and 1 M SO<sub>4</sub>/TiO<sub>2</sub>-500 catalysts, with total acidity values of 2.642 and 6.920 mmol/g, respectively. Sulfation increases titania particles via agglomeration. In contrast, sulfation did not practically change the size of zirconia particles. The sulfation process causes color of both catalyst particles to brighten due to the presence of sulfate. There was a decrease in surface area and pore volume of catalysts after sulfation; the materials' mesoporous structural properties were confirmed. The 1 M SO<sub>4</sub>/ZrO<sub>2</sub> and 1 M SO<sub>4</sub>/TiO<sub>2</sub> catalysts calcined at 500 ℃ are the best candidate heterogeneous acid catalysts synthesized in thus work.
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Recent advances in biomass based activated carbon for carbon dioxide capture – A review
Nuradila Zahirah Mohd Azmi,Archina Buthiyappan,Abdul Aziz Abdul Raman,Muhamad Fazly Abdul Patah,Suriati Sufian 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
Various conventional adsorbents such as metal–organic framework (MOF), zeolites, commercial activatedcarbon, activated alumina, and metal oxides are being used to capture carbon dioxide (CO2) in pre-andpost-combustion. Conventional adsorbents, however, have several shortcomings, including high cost,high energy requirements, and resource scarcity. Waste can be used as a precursor for activated carbondevelopment, which has environmental and economic benefits. This review article aimed to explore thepotential for agricultural waste to be converted into an activated carbon (AC) precursor for CO2 adsorption. Properties and comparison of various biomass-based activated carbon for CO2 adsorption have beendiscussed. Further, hybrid activated carbon-containing functional groups to improve the selectivity andadsorption efficiency of CO2 are also reviewed and summarized. The effects of operating parameters,including types of activating agents, impregnation ratio and activation temperature, were also studied. The properties of AC were compared, such as compositional, surface area, microporous volume, functionalgroups and adsorption capacity. AC derived from waste materials has a high CO2 uptake, comparablewith commercial adsorbents. However, the selection of precursor and activation methods playessential roles in synthesizing of AC. In summary, biomass-based activated carbon is an attractive materialto develop AC for carbon dioxide adsorption.
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