Carbon dioxide separation from binary gas mixture containing high carbon dioxide content by pressure swing adsorption utilizing organic and inorganic adsorbents / Aman Abdullah
Proses penkayaan dan pemisahan gas karbon dioksida telah dikaji selama beberapa dekad dan pelbagai kaedah sedang digunakan dalam industri untuk mengurangkan dan menahan gas CO2 akibat ciri-ciri pengakisan dan kesan-kesannya negatif terhadap alam sekitar. Gas rumah hijau seperti metana (CH4) dan CO2 adalah gas yang paling banyak dihasilkan dari telaga gas asli yang mempunyai kesan negatif yang signifikan terhadap pemanasan global. Dalam kajian ini, kaedah penjerapan ayunan tekanan digunakan sebagai mekanisme untuk menawan dan mengembalikan gas binari melalui proses pemisahan gas oleh penjerap. Penjerap yang digunakan dalam kajian ini ialah Zeolite 5A, Zirconium-benzene dicarboxylate (UiO-66) dan karbon teraktifk daripada Kenaf dan Kulit isirong sawit (PKS) menggunakan tahap tekanan sehingga 3 Bar. Penjerap telah disedia dan dicirikan menggunakan analisa Pembelauan Sinar-X (XRD), analisa Brunauer–Emmett–Teller (BET), analisa Mikroskopi Elektron Imbasan (SEM), analisa X-Ray Tenaga Sebaran (EDX) dan analisa saiz partikel. Pemilihan penjerap dan keupayaannya diuji melalui gas campuran binari sebanyak 70% CO2 dan 30% CH4 melalui kajian terobosan menggunakan cara volumetrik. Maklumat experimen telah dikumpulkan dengan memanipulasi julat masa penyerapan dan pelepasan sehingga 4 minit. Hasil kajian menunjukkan bahawa gas CO2 mempunyai tarikan tinggi berbanding dengan CH4 untuk penjerap-penjerap ini. Masa tepu penjerap merosot apabila peningkatan tekanan berlaku dan sebaliknya. Maklumat eksperimen menggambarkan bahawa karbon teraktifk yang dihasilkan daripada PKS menghasilkan ketulenan dan pemulihan gas CH4 dan CO2 yang terbaik. Kadar ketulenan CH4 dan CO2 berjaya mencapai sekitar 85% dan 94% manakala pemulihan CH4 dan CO2 adalah hampir 94% dan 89%. Sebaliknya, penjerap yang lain mencapai masa tepu dalam waktu yang sangat singkat dan kurang berkesan untuk pemisahan kandungan karbon dioksida yang tinggi.
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Carbon dioxide (CO2) gas enrichment and separation process have been researched for decades and various methods are being applied in industries to reduce and resist CO2 gas due to its corrosive characteristics and negative effects on environment. Greenhouse gases such as methane (CH4) and CO2 are the most abundant in natural gas wells. They contribute significant negative effects to global warming. In this research, Pressure swing adsorption method was utilized as a mechanism to capture and recover binary gas via gas separation process by adsorbents. The adsorbents used in this study were Zeolite 5A, Zirconium-benzene dicarboxylate (UiO-66) and activated carbons made from Kenaf and palm kernel shell (PKS) within the pressure differences of up to 3 bars. The adsorbents were prepared and characterized using X-Ray Diffraction (XRD) analysis, Brunauer–Emmett–Teller (BET) analysis, Scanning Electron Microscope (SEM) analysis, Energy Dispersive X-Ray (EDX) analysis and particle size distribution analysis. Adsorbents selection and their capability were tested using binary mixture gas of 70% CO2 and 30% CH4 via breakthrough studies using volumetric method. The experimental data were collected by manipulating the adsorption and desorption time ranging up to 4 minutes. The results show that CO2 gas had higher affinity than CH4 for these adsorbents. Adsorbent saturation period declined towards increasing pressure and vice versa. Experimental data showed that activated carbon made from palm kernel shell yielded the optimum purity and recovery of CH4 and CO2 gases. Purity of CH4 and CO2 of 85% and 94% respectively were successfully achieved at recovery of CH4 and CO2 of 94% and 89% respectively. The other adsorbents were saturated quickly and less effective for high carbon dioxide content separation.
Carbon dioxide separation from binary gas mixture containing high carbon dioxide content by pressure swing adsorption utilizing organic and inorganic adsorbents / Aman Abdullah
Carbon dioxide separation from binary gas mixture containing high carbon dioxide content by pressure swing adsorption utilizing organic and inorganic adsorbents_Aman Abdullah _K4_2019_MYMY