Development Of Forced-Flow Electrophoresis For Proteins Concentration [QD79.E44 H152 2007 f rb ].

Dewasa ini, aplikasi proses penurasan ultra (UF) dalam bidang bioteknologi telah diterima dengan baik untuk memekat dan menulen produk-produk protein plasma seperti albumin dan immunoglobulin. Nowadays, the application of ultrafiltration (UF) process in the field of biotechnology has been well accepted to concentrate and purify plasma protein products such as albumin and immunoglobulin

Effect of Liquid Flow Rate and Amine Concentration on CO 2 Removal from Natural Gas at High Pressure Operation in Packed Absorption Column

Abstract. Greenhouse gas (GHG) emissions such as carbon dioxide (CO 2 ) and methane (CH 4 ) from oil and natural gas operation at offshore platforms have significant contribution to global warming. The reduction of these GHG emissions is possible through CO 2 capture technology. This study reports the absorption performance of monoethanolamine (MEA) for the removal of CO 2 from natural gas (NG) at high pressure conditions. The absorption experiments were performed in an absorption column packed with Sulzer Metal Gauze Packing at 5.0 MPa operating pressure. The absorption performance was evaluated in terms of CO 2 removal (%) with liquid flow rate ranging from 1.81 to 4.51 m 3 /m 2 .h and MEA concentration of 1.0 -4.0 kmol/m 3 . It was found that CO 2 removal (%) had increased with increasing liquid flow rate and MEA concentration

Selection of renewable energy in rural area via life cycle assessment-analytical hierarchy process (LCA-AHP): a case study of Tatau, Sarawak

With a growing global population and energy demand, there is increasing concern about the world’s reliance on fossil fuels, which have a negative impact on the climate, necessitating the immediate transition to a cleaner energy resource. This effort can be initiated in the rural areas of developing countries for a sustainable, efficient and affordable energy source. This study evaluated four types of renewable energy (solar, wind, biomass, and mini-hydro energy) using the integrated Life Cycle Assessment (LCA) and Analytical Hierarchy Process (AHP) approaches to select the best renewable energy source in Tatau, Sarawak. The criteria under consideration in this study included the environment, engineering and economics. The AHP results showed that solar energy received the highest score of 0.299 in terms of the evaluated criteria, followed by mini-hydro, biomass and wind energy, which received scores of 0.271, 0.230 and 0.200, respectively. These findings can be used to develop a systematic procedure for determining the best form of renewable energy for rural areas. This approach could be vital for the authorities that are responsible for breaking down multi-perspective criteria for future decision making in the transition into renewable energy

C02 ABSORPTION FROM NATURAL GAS USING PIPERAZINE PROMOTED 2-AMIN0-2-METHYL-1-PROPANOL SOL VENT AT HIGH PRESSURE CONDITIONS

Penyerapan C02 untuk penyingkiran pukal C02 yang berkepekatan tinggi daripada gas asli telah dikaji dengan menggunakan bahan penyerap alternatif: larutan campuran 2-Amino-2-Methyl-1-Propanol (AMP) dimangkinkan oleh Piperazine (PZ). Eksperimen penyerapan telah dikendalikan di dalam sebuah turus penyerap berskalakecil yang dipadatkan dengan penyendat kasa logam Sulzer. Prestasi proses bagi penyerap alternatif telah dibandingkan dengan larutan MEA sebagai penyerap tanda aras pada pelbagai tekanan operasi dalam lingkungan 0.\0 to 5.05 MP

C02 ABSORPTION FROM NATURAL GAS USING PIPERAZINE PROMOTED 2-AMIN0-2-METHYL-1-PROPANOL SOL VENT AT HIGH PRESSURE CONDITIONS

Penyerapan C02 untuk penyingkiran pukal C02 yang berkepekatan tinggi daripada gas asli telah dikaji dengan menggunakan bahan penyerap alternatif: larutan campuran 2-Amino-2-Methyl-1-Propanol (AMP) dimangkinkan oleh Piperazine (PZ). Eksperimen penyerapan telah dikendalikan di dalam sebuah turus penyerap berskalakecil yang dipadatkan dengan penyendat kasa logam Sulzer. Prestasi proses bagi penyerap alternatif telah dibandingkan dengan larutan MEA sebagai penyerap tanda aras pada pelbagai tekanan operasi dalam lingkungan 0.\0 to 5.05 MP

Performance of fatty acid-modified spent coffee grounds as a potential adsorbent for oil adsorption

Problems caused by fats, oils, and grease (FOG) in sewer systems have escalated over the years. FOG produced from households, restaurants, stalls, and food processing facilities have contaminated water resources through the sewer system. Thus, trace removal of oil from wastewater is a necessary measure to ensure minimal discharge of FOG into the environment. In the present study, due to the high volumes of coffee waste with no commercial value being generated daily, spent coffee grounds (SCG) were exploited as an oil adsorbent. However, due to their low hydrophobicity, SCG tend to have limited oil adsorption capacity. In this work, SCG underwent pre-treatment using alkali and were further modified with waste cooking oil (WCO) that contained free fatty acids (FFAs) at different ratios (1:10, 1:20, and 1:30) in order to enhance their oil adsorption performance. The performance of the synthesised adsorbents was tested in a batch adsorption process at different contact times. From the batch adsorption test, the highest oil adsorption capacity (2.807 ± 0.086?g/g) was observed using the 1:10 ratio of SCG to FFAs-WCO within 180?min of contact time

CO2 Absorption from Biogas Using Piperazine-Promoted 2-Amino-2-methyl-1-propanol: Process Performance in a Packed Column

In this work, CO2 absorption from simulated biogas is investigated using different blends of a PZ + AMP solution in an absorption system at CO2 partial pressures ranging between 20 and 110 kPa. The collected data were presented as CO2 removal profiles along the packed column and were evaluated in terms of CO2 removal efficiency (%) and average overall volumetric mass transfer coefficient in the gas phase (KGav¯). An increased PZ concentration in the AMP solution was found to significantly increase the CO2 removal efficiency and KGav¯ values. It was observed that, when conducted at different CO2 partial pressures, gas and liquid flow rates, and chemical concentrations, the Lamine/GCO2 ratio strongly influenced the process behaviour in the packed column. Additionally, the optimal inlet liquid temperature was observed to be 35 ± 2 °C in this study

Potential of pretreated spent coffee ground as adsorbent for oil adsorption

Spent Coffee Ground (SCG) has the potential of becoming a low-cost adsorbent for oil removal. However, the effectiveness of SCG as an oil adsorbent is limited by its hydrophilicity. In this work, chemical pretreatment of SCG with acid and alkali was evaluated as a means of enhancing its performance for adsorbing palm cooking oil. The surface morphology of raw and pretreated SCG samples was characterised using a Scanning Electron Microscope (SEM). The functional groups were analysed using Fourier Transform Infrared (FTIR) spectroscopy. A comparison between adsorption performances was performed in terms of contact time in batch adsorption experiments to determine the adsorption capacity of SCG-based adsorbents with oil. The SEM results showed that more developed pores were present on the acid- and alkali-treated SCG samples compared to on the raw SCG sample, while the FTIR results indicated the elimination of hydrophilic cellulose and hemicellulose on these samples. According to these results, both acid- and alkali-treated SCG have better tendencies of adsorbing oil compared to raw SCG. The maximum oil adsorption capacity (2.549 g/g) occurred after 150 min of contact time between alkali-treated SCG adsorbents and oil