Sheet-type polysulfone membranes containing titanium dioxide or graphene oxide nanoparticles and coated with polydimethylsiloxane are used for the separation of carbon dioxide from methane using a non-solvent phase separation (NIP) membrane preparation process.

Abstract

OCR 09WP 23 / 06 / 2569 This invention, which is the subject of a patent application, is an invention of polysulfone membrane. A sheet-type membrane containing a mixture of titanium dioxide or graphene oxide nanoparticles and... A membrane is coated with polydimethylsiloxane for the separation of carbon dioxide from gas. Methane is prepared using a membrane separation process employing a solvent-induced phase separation method (Non-). Solvent Phase Separation (NIPs) is used to create membranes that are specific to carbon dioxide. The oxide yield is significantly higher compared to methane gas. Furthermore, a comparison of gas permeation rates is also necessary. Carbon dioxide and membranes without nanoparticles; polysulfone membranes with nanoparticles were also compared. The carbon dioxide permeation rate will be higher than 20-116 percent, according to the results. This test demonstrates that this invented polysulfone membrane can be further developed for enhancement. Improving the quality of biogas by reducing the amount of carbon dioxide.

Claims

OCR 09WP 23 / 06 / 2569 1. Formulation of a sheet polysulfone membrane for carbon dioxide separation. Methane gas, which consists of... The polymer includes polysulfone, at 14-20% by weight. Solvent 75-85% by weight. Nanoparticles, 0.1-10% by weight. - Solvents can be selected from N-methyl-2-pyrrolidone, tetracycline, etc. Hydrophyllan (Tetrahydrofuran), N,N-dimethylacetamide (N,N- dimethylacetamide) - Nanoparticles can be selected from either titanium dioxide or graphene oxide. - Membrane coating with polydimethylsiloxane. Dissolve the polydimethylsiloxane resin. In a 5-12 percent by volume hexane or cyclohexane solution.

2. Formulation of a sheet polysulfone membrane for carbon dioxide separation. Methane gas, under claim 1, solvent of choice from N-methyl-2-pyrrolidone (N-methyl-2- pyrrolidone), tetrahydrofuran, N,N-dimethylacetamide (N,N- dimethylacetamide) 3. Formulation of a sheet polysulfone membrane for carbon dioxide separation. Methane gas, under either claim 1 or 2, can be obtained from nanoparticles of titanium dioxide. Or graphene oxide, the addition of titanium dioxide to polyether. Sulfones can increase the permeability of carbon dioxide gas, as tested in this research. The specificity between carbon dioxide and nitrogen gases was found to be affected by the addition of titanium. Carbon dioxide can increase the carbon dioxide specificity of the membrane.

4. A process for manufacturing sheet polysulfone membranes for carbon dioxide and gas separation. Methane, under Claim 1, involves the following steps: Preparation of polysulfone membrane sheets. A. Add the nanoparticles to the solvent and sonicate for at least 20 minutes until... The particles are well dispersed. B. Add the polymer to the solution, stir, and heat to a temperature of 50-70 degrees Celsius. Steep at Celsius for 3 hours until a homogeneous solution is obtained. C. Stop stirring and filter the solution through a 200-500 micron sieve. Then set it aside. Leave the solution at room temperature until the polymer solution is free of air bubbles. If air bubbles remain, Sonicate the polymer solution until no air bubbles are present. d. Pour the polymer solution onto the glass. Use a film casting tool, specifically a blade for film casting. (Casting knife) or Doctor Blade or automatic film casting machine (Casting) (Machine) for casting film onto glass, with adjustable thickness from 75-550 microns. Step 4: Immerse the glass sheet containing the polymer solution in water until the membrane solidifies. Remove the membrane from the glass plate. Immerse the membrane in water for at least 24 hours to rinse off the solvent. Get it all out. f. Soak the membrane in methanol for at least 30 minutes and dry it at room temperature. Membrane coating with polydimethylsiloxane. B. Prepare a polydimethylsiloxane solution by dissolving the polydimethylsiloxane in part... Dissolve zinc in a 5-12 percent by volume hexane or cyclohexane solution and stir until the solution is... Mix thoroughly for at least 20 minutes. Add the polydimethylsiloxane hardener. Prepare the solution with a resin to hardener ratio of 10:

1. Stir the solution thoroughly. together C. Immerse the polysulfone membrane sheet in distilled water for 1-5 minutes and then remove it and blot it dry. Filter the paper until all excess water is removed. Then immerse it in a polydimethylsiloxane solution for 1-10 minutes. Then, bake in an oven at 80-120 degrees Celsius for 2-3 hours to induce polydimethylcellulose. The loessen has solidified completely.