Prediksi Kesetimbangan Cair-Cair pada Sistem Air + Asam Format + Pelarut Organik dengan Model UNIFAC

Formic acid can be produced by a fermentation process, producing an aqueous solution in the form of a fermentation broth. The separation of formic acid from water is challenging due to the presence of an azeotropic mixture. The aim of this research is to predict the liquid-liquid equilibrium data using the universal functional activity coefficient (UNIFAC) model for formic acid + organic solvent + water systems at 298.15 and 323.15 K and atmospheric pressure (101.3 kPa). The liquid-liquid equilibrium data are required as a reference for optimal design of formic acid extraction process. This research also introduces new two-phase systems for the separation of formic acid from aqueous solution and expands the scope of thermodynamic studies on formic acid extraction. The extraction performance was in the order of MIPK > 2-hexanone > MIBK. The temperature has no significant influence on the extraction performance. The prediction of formic acid + water + MIBK system at 298,15 K and atmospheric pressure (101.3 kPa) was also compared with the experimental data with the RMSD 9,76 %. This result represented that UNIFAC was a reliable model for the prediction of liquid-liquid equilibria of system involving formic acid

Prediksi Kesetimbangan Cair-Cair pada Sistem Air + Asam Format + Pelarut Organik dengan Model UNIFAC

Formic acid can be produced by a fermentation process, producing an aqueous solution in the form of a fermentation broth. The separation of formic acid from water is challenging due to the presence of an azeotropic mixture. The aim of this research is to predict the liquid-liquid equilibrium data using the universal functional activity coefficient (UNIFAC) model for formic acid + organic solvent + water systems at 298.15 and 323.15 K and atmospheric pressure (101.3 kPa). The liquid-liquid equilibrium data are required as a reference for optimal design of formic acid extraction process. This research also introduces new two-phase systems for the separation of formic acid from aqueous solution and expands the scope of thermodynamic studies on formic acid extraction. The extraction performance was in the order of MIPK > 2-hexanone > MIBK. The temperature has no significant influence on the extraction performance. The prediction of formic acid + water + MIBK system at 298,15 K and atmospheric pressure (101.3 kPa) was also compared with the experimental data with the RMSD 9,76 %. This result represented that UNIFAC was a reliable model for the prediction of liquid-liquid equilibria of system involving formic acid

Prediksi Data Kesetimbangan Cair-cair Pada Sistem Terner Air + Asam Laktat + Pelarut Menggunakan Model UNIFAC-DMD

Industrial lactic acid can be produced via chemical synthesis and fermentative production. However, due to the environmental issue and consumer preference, fermentative production of lactic acid is preferable. Lactic acid is used in many industries, including food processing, pharmaceutical, chemical and cosmetic industries. Various methods have been developed for separating lactic acid from its aqueous solution, and liquid-liquid extraction is considered as the most promising and efficient method. Liquid-liquid equilibrium data provide the basis for a rational design and optimal extraction operation. The objective of this study is to predict the liquid-liquid equilibria in the ternary systems of water+ lactic acid + solvent (MIBK, 2-pentanol, 1-hexanol) at temperatures of 303.15 K and 313.15 K and atmospheric pressure (101.3 kPa) using the UNIFAC-Dortmund (DMD) model. The distribution coefficients and separation factors were determined to evaluate the extraction performance of lactic acid. The extraction performance was in the order of MIBK > 1-hexanol > 2-pentanol. The prediction of lactic acid + water + MIBK system at 303,15 K was also compared with the experimental data with the RMSD 2,5 %. This result represented that UNIFAC-DMD was a reliable model for the prediction of liquid-liquid equilibria of system involving lactic acid

Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel

The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process

Prediksi Data Kesetimbangan Cair-cair Pada Sistem Terner Air + Asam Laktat + Pelarut Menggunakan Model UNIFAC-DMD

Industrial lactic acid can be produced via chemical synthesis and fermentative production. However, due to the environmental issue and consumer preference, fermentative production of lactic acid is preferable. Lactic acid is used in many industries, including food processing, pharmaceutical, chemical and cosmetic industries. Various methods have been developed for separating lactic acid from its aqueous solution, and liquid-liquid extraction is considered as the most promising and efficient method. Liquid-liquid equilibrium data provide the basis for a rational design and optimal extraction operation. The objective of this study is to predict the liquid-liquid equilibria in the ternary systems of water+ lactic acid + solvent (MIBK, 2-pentanol, 1-hexanol) at temperatures of 303.15 K and 313.15 K and atmospheric pressure (101.3 kPa) using the UNIFAC-Dortmund (DMD) model. The distribution coefficients and separation factors were determined to evaluate the extraction performance of lactic acid. The extraction performance was in the order of MIBK > 1-hexanol > 2-pentanol. The prediction of lactic acid + water + MIBK system at 303,15 K was also compared with the experimental data with the RMSD 2,5 %. This result represented that UNIFAC-DMD was a reliable model for the prediction of liquid-liquid equilibria of system involving lactic acid

Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel

The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process

CO2 Solubility in Electrolyte Solution of Potassium Carbonate with the Addition of Promotor Amines (MDEA-DEA/ PZ-DEA) at Various Temperatures

Carbon dioxide has a huge impact on the increase of greenhouse gas formation causing global warming and climate change. The most effective method to capture CO2 is chemical absorption using potassium carbonate (K2CO3) solution and amines as additive to enhance the absorption rate. CO2 solubilities in 30% of K2CO3 and 5% of the total composition of mixed methyldiethanolamine (MDEA)–diethanolamine (DEA) / piperazine (PZ)-DEA solutions at various temperatures of 303.15-323.15 K and atmospheric pressure are reported. The solubility data were measured using an equilibrium cell apparatus with the N2O analogy method. The E-NRTL model was used to correlate the experimental data accurately. The binary interaction parameters of the model for the CO2-K2CO3-MDEA-DEA-H2O and CO2-K2CO3-PZ-DEA-H2O systems were obtained. The CO2 physical solubility in 30% of K2CO3, 5% of PZ, and 0% of DEA at 303.15 K had the highest value, while the Henry constant of CO2 in this solution had the lowest value. The CO2 loading increased with increasing partial pressure of CO2, while the CO2 solubility decreased with increasing temperature. Any increase in MDEA concentration from 0% to 5% enhanced the CO2 partial pressure, otherwise, an increase in PZ concentration from 0% to 5% decreased the CO2 partial pressure

Pendampingan UMKM Binaan Koperasi Wanita Setia Bhakti Wanita Surabaya Menuju Sertifikasi Halal

Sejak lama Negara Indonesia memiliki potensi besar dalam industri halal karena mayoritas penduduknya memeluk agama Islam. Langkah pemerintah Indonesia semakin jelas terlihat dengan diberlakukannya UU No. 33 tahun 2014 dan PP No. 31 tahun 2019 tentang Jaminan Produk Halal (JPH) yang mengatur perubahan sistem prosedur dan registrasi sertifikasi halal dari bersifat sukarela menjadi wajib sejak 17 Oktober 2019. Hal tersebut berdampak pada seluruh pelaku usaha. Tak terkecuali pelaku UMKM binaan dari Koperasi Wanita Setia Bhakti Wanita Surabaya. Koperasi Wanita yang berdiri sejak 1975 telah memiliki 13.615 anggota dan ratusan binaan UMKM. Pelaku UMKM binaan Kopwan SBW belum mengetahui pentingnya sertifikasi halal dan prosedural pendaftarannya. Oleh karena itu, peran perguruan tinggi hadir dalam kegiatan pengabdian kepada masyarakat untuk mendampingi para UMKM binaan Kopwan SBW mengurus sertifikasi halal. Terdapat 4 strategi kegiatan yang dilakukan dalam pengabdian kepada masyarakat ini. Strategi yang pertama yaitu berdiskusi dalam rangka menyampaikan ide gagasan jangka pendek dan Panjang kepada pengurus Koperasi Wanita Setia Bhakti Wanita Surabaya. Strategi selanjutnya adalah mendaftarkan para UMKM binaan dalam pelatihan Kader Penggerak Halal (KPH) yang dilaksanakan kolektif oleh Pusat Kajian Halal ITS. Setelah itu melakukan visitasi dan pendampingan langsung kepada masing-masing UMKM binaan dan strategi yang terakhir adalah pemetaan binaan UMKM dalam mengikuti program bimbingan teknis audit halal atau program sertifikasi halal gratis (SEHATI). Harapan dari pengabdian masyarakat ini adalah dapat memberdayakan para binaan UMKM untuk bersaing produk halal di industri halal dalam skala internasional

Karakteristik Biokomposit Edible Film dari Campuran Kitosan dan Pektin Limbah Kulit Pisang Kepok (Musa acuminata)

Kemasan plastik banyak digunakan pada industri makanan dan minuman di Indonesia karena praktis dan mudah. Namun, disisi lain ini merupakan bencana bagi lingkungan karena plastik merupakan bahan yang sulit terurai (nondegradable). Edible film merupakan salah satu alternatif yang dapat dipertimbangkan untuk menggantikan kemasan plastik. Tujuan dari penelitian ini adalah memanfaatkan kitosan dari limbah cangkang rajungan dan pektin dari limbah kulit pisang kepok sebagai bahan baku pembuatan edible film. Kitosan diperoleh dari proses degreasing, deproteinasi, demineralisasi dan deasetilasi cangkang rajungan. Pektin diperoleh dari proses hidrolisis kulit pisang kepok. Edible film yang berbasis kitosan dan pektin dibuat melalui proses blending dengan ratio (K:P) 100:0; 60:40; 50:50: 40:60 dan 0:100. Analisis karakteristik yang dilakukan meliputi warna, transparan, ketebalan, kelarutan dalam air, laju transmisi uap air (WVTR), kadar air, swelling degree, biodegradabilitas, dan aktivitas antimikroba. Hasil penelitian menunjukkan edible film kitosan dan pektin yang paling optimal adalah ratio 50:50