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:
본 발명은 퍼플루오로사이클로부탄기를 포함하는 브랜치된 후술폰화 멀티블록 공중합체, 이의 제조방법 및 이를 이용한 전해질막에 관한 것으로, 본 발명에 따른 퍼플루오로사이클로부탄기를 포함하는 브랜치된 후술폰화 멀티블록 공중합체는 제조방법을 통해 용액 또는 용융 상태에서 퍼플로오사이클로부탄기를 포함하는 브랜치된 후술폰화 멀티블록 공중합체를 용이하게 제조할 수 있고, 고분자 골격 내의 술폰산기의 분포, 위치, 수 등을 제어할 수 있을 뿐만 아니라, 이온전도가 용이한 브랜치 및 블록 구조에 의해 높은 수소이온 전도도, 기계적 물성 및 화학적 안정성을 가지고, 술폰산기의 증가에 따른 막 물성 저하를 수반하지 않기 때문에 고분자블렌드막, 고분자가교막, 고분자복합막, 평막, 중공사막, 튜브막 등의 다양한 형태로 가공되어, 연 료전지막, 이온교환막, 제습막, 가습막 등에 유용하게 사용할 수 있다.
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:
PURPOSE: A branched sulfonated copolymer is provided to ensure a branched structure with easy phase separation and hydrogen ion conductance and to secure excellent hydrogen ion conductivity and mechanical properties. CONSTITUTION: A method for preparing a branched sulfonated copolymer including a perfluorocyclobutane group represented by chemical formula 1 comprises the steps of: (i) polymerizing the bis(trifluorovinyloxy) monomer of chemical formula 2, the bis(trifluorovinyloxy) monomer of chemical formula 3, and the tris(trifluorovinyloxy) monomer of chemical formula 4 to prepare a branched sulfonated copolymer including a perfluorocyclobutane group represented by chemical formula 5; and (ii) reacting the copolymer represented by chemical formula 5 with a sulfonating agent.
Abstract:
본 발명은 퍼플루오로폴리에테르(Perfluoropolyether)의 중화방법에 관한 것으로, 더욱 상세하게는 불화제로서 불소가스대신, 불화금속을 사용하여 산 말단기를 포함하는 퍼플루오로폴리에테르의 중화 방법에 관한 것이다. 본 발명에 따른 퍼플루오로폴리에테르의 중화방법은 퍼플루오로폴리에테르의 손실이 없을 뿐만 아니라, 인체에 치명적인 불소가스를 사용하지 않고도 빠른시간 안에 고효율로 퍼플루오로폴리에테르의 산 말단기를 중화시켜 퍼플루오로폴리에테르의 제조비용을 감소시키고, 안전하게 제조할 수 있다. 퍼플루오로폴리에테르(Polyfluoropolyether), 중화, 불화 금속
Abstract:
Provided are novel benzimidazole monomers containing trifluorovinyloxy groups with improved solubility against organic solvent and gas permeability, and reduced dielectric constant, while physical properties of polybenzimidazoles are preserved, and polybenzimidazoles membrane prepared by using the same monomers. The benzimidazole monomers containing trifluorovinyloxy groups represented by the formula(1), in which X is a direct bonding, are provided and prepared by reacting hydroxyl benzoate represented by the formula(2) with dibromotetrafluoroethane represented by the formula(3) in the presence of alkali metal or its precursor so as to prepare methyl(bromotetrafluoroethoxy)benzoate represented by the formula(4), reacting the methyl(bromotetrafluoroethoxy)benzoate represented by the formula(4) with amine compounds represented by the formula(5) to prepare imidazole benzoate compounds represented by the formula(6), and oxidizing the imidazole benzoate compounds represented by the formula(6).