Penerapan Model Isotermal untuk Adsorpsi Statik Xanthan pada Batuan Pasir untuk Berbagai Salinitas

Abstract

Salah satu fenomena yang biasa terjadi selama injeksi polimer adalah adsorpsi. Fenomena ini memainkan peran penting, karena mereka mempengaruhi sifat batuan dan fluida. Adanya lapisan polimer teradsorpsi akan diameter pori. Hal ini akan menghambat aliran fluida. Dalam kajian ini dilakukan pengamatan pengaruh konsentrasi dan salinitas terhadap adsorpsi xanthan pada butiran pasir dalam sistem statik (batch). Konsentrasi xanthan divariasikan dari 200 ppm hingga 2,000 ppm sedangkan salinitas divariasikan dari 10,000 ppm hingga 20,000 ppm. Butiran pasir yang digunakan berukuran pasir 100 mesh (0.149 mm). Percobaan dilakukan pada suhu ruang. Pengukuran absorben dilakukan dengan menggunakan spektrophotometer pada panjang gelombang cahaya tampak sebesar 600 nm. Tiga model adsorpsi isothermal digunakan dalam kajian ini yaitu Langmuir, Freundlich, dan Simha-Frish-Eirich untuk membuat korelasi antara konsentrasi partikel teradsorpsi dan konsentrasi larutan xanthan dalam kesetimbangan. Berdasarkan hal pengamatan disimpulkan bahwa tingkat adsorpsi berkurang dengan bertambahnya salinitas. Dalam kajian ini secara umum penerapan model Freundlich memberikan hasil terbaik dalam menggambarkan proses adsorpsi xanthan.

Chitosan as a Biopolymer in the EOR Method: A Literature Study

“…Another factor that causes the absence of precipitate because the concentration used is not very large [15]. A good solution is one that is clear and has no precipitate [8].…”

“…Thermal methods The development of polymer injection continues until the use of biopolymers for injection because it has advantages such as relatively easy materials to obtain and their availability is quite abundant in nature [9], resistant to high temperatures and high salinity and nontoxic in nature [8], [10]. Biopolymers are natural polymers with the main constituent components being polysaccharides whose origin is from living things [8]. The basic materials of biopolymer-forming polysaccharides have many sources in nature and are quite diverse [9].…”

“…Chitosan is an abundant polysaccharide compound second only to cellulose, is a nontoxic, biodegradable, environmentally friendly alkaline polysaccharide and relatively cheap [8], [9], [12]. Chitosan is the result of chitin deacetylation from the hydrolysis process in alkaline solutions [18].…”

“…Water-soluble polymers act as viscosifying agents that can control the mobility of water as an injection fluid [6], [7]. Polymer injection aims to reduce mobility ratio and increase water viscosity, so that it will increase sweep efficiency which will have an impact on increasing the recovery factor value [6], [8]. Fig.…”

The Potential of Crab Chitosan Polymer as EOR Injection Fluid

“…Measurements were carried out at room temperature for 7 days to reach an equilibrium state [19]. After that, the polymer solution was separated from the sand by filtering and then the amount of absorbent was measured using a spectrophotometer [20,21,22].…”