Abstract:
본 발명은 무기첨가제를 추가한 중공사막의 생산방법에 관한 것으로, 더욱 구체적으로는 기체선택성 고분자, 제1용매 및 제2용매를 사용하는 종래의 중공사막 생산방법에 추가로 무기첨가제를 첨가하여 중공사막을 제조함으로써, 기체 투과도와 선택도가 현저히 향상되므로, 바이오 메탄 및 황화수소의 회수, 이산화탄소와 같은 온실기체의 회수, 산소의 부화, 질소의 고순도화, 석유화학의 수소정제 등의 기체분리에 적용 가능한 비대칭구조의 중공사막의 제조에 유용하게 사용될 수 있다.
Abstract:
The present invention relates to a method of collecting methane gas from biogas and a device of collecting methane gas from biogas using the same. More specifically, the present invention relates to a method of collecting methane gas from biogas capable of discharging biogas fed into hollow fibers to outside the hollow fibers in bubbles of fine micro size, contacting the discharged gas with water for carbon dioxide removal by dissolving to refine gas for car or city to a required purity of 95% or more. And a device of collecting methane gas from biogas using the same is also provided. The method of the present invention comprises: (step 1) supplying an absorbent to an absorbent-filled space in an absorption module; (step 2) injecting biogas to hollow fibers inside a hydrophobic porous hollow fiber membrane bubbling contactor; (step 3) controlling the pressure inside the absorption module for carbon dioxide in biogas to be selectively dissolved in the absorbent; and (step 4) separating carbon dioxide dissolved absorbent from undissolved gas in the absorbent.
Abstract:
PURPOSE: A membrane vacuum stripping process for reducing energy in a carbon dioxide absorption process using a non-porous composite membrane is provided to reduce energy consumption of the entire absorption process by lowering operational temperatures. CONSTITUTION: A membrane vacuum stripping process strips carbon dioxide under a decompression condition at 100 deg C or less using a non-porous composite membrane. A manufacturing method of the composite membrane includes the following: a porous polymer is prepared as a support; a non-porous polymer thin film is coated on the support using a casting method. The thickness of the thin film is 4um. The porous polymer is polyethylene, and the non-porous polymer thin film is made of polydimethylsiloxane.
Abstract:
본 발명은 바이오 가스로부터의 메탄 가스 회수 방법 및 이 방법을 이용한 바이오가스로부터 메탄 가스를 회수하기 위한 장치에 대한 것으로, 더욱 상세하게는 중공사 내부로 공급되는 바이오 가스를 미세한 마이크로 크기의 기포 형태로 중공사 외부로 발생시켜 흡수제인 물과 접촉시켜 이산화탄소를 용해시켜 제거함으로써 차량용 또는 도시 가스의 요구순도인 95%이상으로 정제하는 바이오 가스로부터의 메탄 가스 회수 방법 및 이 방법을 이용한 바이오가스로부터 메탄 가스를 회수하기 위한 장치에 대한 것이다. 본 발명은, 흡수 모듈의 흡수제 충진 공간으로 흡수제를 공급하는 단계(단계 1)과, 다공성의 소수성 중공사 분리막 기포 발생 접촉기의 중공사 내부로 바이오 가스를 주입하는 단계(단계 2)와, 바이오 가스 중 이산화탄소가 선택적으로 흡수제에 용해될 수 있도록 상기 흡수 모듈 내의 압력을 조절하는 단계(단계 3) 및 이산화탄소가 용해된 흡수제와 흡수제에 용해되지 않은 기체를 분리하는 단계(단계 4)를 포함하는 바이오 가스로부터의 메탄 가스 회수 방법을 제공한다.
Abstract:
PURPOSE: A method of mass producing asymmetric hollow fiber membranes for separating highly selective permeable gas is provided to implement mass producing processes by adding inorganic additives to a gas selective polymer, a first solvent, and a second solvent. CONSTITUTION: A method of mass producing asymmetric hollow fiber membranes for separating highly selective permeable gas includes the following: a gas selective polymer, a first solvent, a second solvent, inorganic additives are mixed, and bubbles are eliminated from the mixture to prepare a base solution; the base solution and an inner coagulant are spun to air layers to coagulate the inner parts of hollow fiber membranes; the hollow fiber membranes with coagulated inner parts are immersed in a first solidifying bath to phase-convert the outer surfaces of the hollow fiber membranes; the treated hollow fiber membranes are immersed in a second solidifying bath to eliminate remaining solvents and are wound into a winding bath; and the produced hollow fiber membranes are dried at an oven. The gas selective polymer is one or the mixture of polyether sulfone, polysulfone, polyimide, polyisoimide, polyamide, polybenzimidazole, and brominated polyether sulfone.
Abstract:
PURPOSE: A method for separating high purity methane gas from landfill gas and an apparatus for refining the methane gas are provided to recycle the methane gas and utilize the methane gas as a fuel by efficiently implementing a methane gas separating process. CONSTITUTION: Landfill gas is successively dehumidified, desulfurized, and desiloxanized in a pre-treating process. The pre-treated gas is compressed and cooled. The compressed and cooled gas is introduced into a double-stepped hollow fiber membrane to separate carbon dioxide. The ratio of a first membrane area to a second membrane area is between 1:1.5 and 1:3.0. The transmittance part of the second membrane is re-circulated to a process in prior to the compressing process. The remaining part of the second membrane eliminates nitrogen and oxygen based on pressure swing absorption.