( ) A fundamental study was carried out to understand the aging or hardening of the wax-oil gels formed in the subsea pipelines during the flow of crude oil from offshore wells to shore. The aging process is a counterdiffusion phenomenon where there exists a ( ) critical carbon number CCN , and wax molecules with carbon numbers greater than the CCN diffuse into the gel matrices and ®ice ®ersa. ...

The determination region of solubility of methanol with gasoline of high aromatic content was investigated experimentally at temperature of 288.2 K. A type 1 liquid-liquid phase diagram was obtained for this ternary system. These results were correlated simultaneously by the UNIQUAC model. The values of the interaction parameters between each pair of components in the system were obtained f...

The effect of the partition coefficient on simulation operation a biotrickling filter treating mixture sulfur compounds was analyzed to evaluate pertinence using Henry’s law in determining its removal capacity. analysis consisted that bio-oxides hydrogen sulfide (H2S), dimethyl (DMS), methyl mercaptan (MM) and disulfide (DMDS) different types models for coefficient: pure water, adjusted from ex...

The UNIQUAC activity coefficient model is extended to predict solid-liquid equilibrium of isotactic crystalline poly (1-butene), iPBu-1, in different organic solvents. The UNIQUAC activity coefficient model used in this work is based on the concept of group contribution and consists of combinatorial, residual and free volume terms. To account for branching of atom groups in the monomer structur...

Prediksi Kesetimbangan Uap Cair Sistem Biner Aseton + Amil Alkohol pada Tekanan 101,3 kPa bertujuan untuk mengetahui kesetimbangan uap-cair sistem tersebut berdasarkan Hukum Raoult dan mengkorelasikan data dengan model Universal Quasi-Chemical (UNIQUAC). diawali menentukan fraksi mol campuran biner aseton amil alkohol menggunakan persamaan tekanan kPa. Kemudian, yang didapat dikorelasikan perhi...

liquid-liquid equilibria for the (water + lactic acid + benzyl alcohol or p-xylene) ternary systems were investigated at atmospheric pressure and in the temperature range from 298.15-318.15 k. the studied systems exhibit two types of liquid-liquid equilibrium (lle) behavior. the system consisting of benzyl alcohol displays type-1 lle behavior, while a type-2 behavior is exhibited by the other s...

Prediksi Kesetimbangan Uap-Cair bertujuan untuk mengetahui kesetimbangan uap-cair sistem biner Tersier Butanol + Isoamil Alkohol pada tekanan 101,3 kPa dan mengkorelasikan tersebut dengan model Universal Quasi-Chemical (UNIQUAC). diawali menentukan fraksi mol campuran tersier butanol isoamil alkohol menggunakan persamaan Hukum Raoult kPa, dimana uap total cairan tergantung komponen murni molnya...

The catalytic-distillation process for the production of t-amyl-methyl-ether (TAME) from methanol and isoamylenes was simulated by developing the process model as a combination of unit operations from HYSYS operations palette. Geometrical characteristics of catalytic-distillation column are those of an industrial pilot plant and the results of simulation were compared with experimental data. T...

in this study a simple and general chemical association theory is introduced. the concept of infinite equilibrium model is re-examined and true mole fractions of associated species are calculated. the theory is applied to derive the distribution function of associated species. as a severe test the application of presented theory to the van der waals mixture model is introduced in order to perfo...