CAJ | 학술논문

经过净化的焦炉气(COG)通过甲烷化反应,使CO和CO_2转化成甲烷,COG中原有的组分H_2、N_2、CO、CO_2、CH_4、C_mH_n系统,变成H_2、N_2、CH_4系统.本文提出了用低温分离的方法将CH_4与H_2、N_2分离,得到纯度(体积分数)99.5%以上的甲烷,并再进行液化,得到液体甲烷(LNG)的工艺流程,并评述了采用产品甲烷作为制冷剂的带有预冷的后置式甲烷绝热膨胀制冷循环及带有预冷的高压甲烷二次节流制冷循环.
경과정화적초로기(COG)통과갑완화반응,사CO화CO_2전화성갑완,COG중원유적조분H_2、N_2、CO、CO_2、CH_4、C_mH_n계통,변성H_2、N_2、CH_4계통.본문제출료용저온분리적방법장CH_4여H_2、N_2분리,득도순도(체적분수)99.5%이상적갑완,병재진행액화,득도액체갑완(LNG)적공예류정,병평술료채용산품갑완작위제랭제적대유예랭적후치식갑완절열팽창제랭순배급대유예랭적고압갑완이차절류제랭순배.
Carbon monoxide and carbon dioxide in purified coke oven gas (COG) could be converted to methane by methana-tion, which changed the COG from a system containing H_2, N_2, CO, C0_2, CH_4 and CmHn to a system consisted of H_2, N_2 and CH_4 A two-stage refrigerating cycle process for production of high purity liquid methane (LNG) from the system containing H_2, N_2 and CH_4 was proposed, in which, CH_4, was firstly separated via cryogenic method, then a liquefaction procedure was performed to obtain liquid methane with a purity of above 99.5%. The rearmounted methane adiabatic expansion refrigeration cycle with precooling and product methane as refrigerant and the refrigerating cycle of two stage throttles by methane at high pressure with precooling were discussed.