铜基/钯基催化剂甲醇裂解气发动机的燃烧特性  

Combustion Characteristic of Methanol Dissociated Gas Engine Through Cu/Pd-Based Catalysts

作　　者：姚春德[1] 李旭聪[1] 唐超[1] 臧儒振[1] 武炎[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机学报》2012年第6期486-491,共6页Transactions of Csice

基　　金：国家自然科学基金资助项目(50876075);科技部"863"课题资助项目(2012AA111719)

摘　　要：以一台电控点火式发动机为原型机,在尾气管上安装甲醇裂解装置,回收废气余热汽化裂解甲醇为裂解气并送入气缸燃烧.在裂解装置中分别采用了钯基和铜基两种催化剂,对比研究了在两者作用下生成的甲醇裂解气在发动机缸内燃烧特性、经济性以及动力性.结果表明,裂解气缸内燃烧压力最大值高于汽油,铜基、钯基催化剂裂解气分别增加为6.2%～14.3%和10.5%～21.5%.裂解气放热率也高于汽油,钯基催化剂裂解气的放热率最高,裂解气的循环变动率较之汽油略有增加.裂解气的快速燃烧期较汽油缩短,铜基和钯基催化剂裂解气缩短幅度高达4.8%和7.1%.裂解气经济性明显优于汽油,同时动力性能够达到原机95%以上.On an electronically controlled SI engine, a methanol dissociated device was installed on the exhaust pipe of engine to recycle exhaust heat for dissociating methanol into the dissociated gas and intro- duce it into engine cylinder. By separately uses Cu-based catalyst and Pd-based catalyst in the dissociated device, engine combustion, economy and dynamic performances were compared. Results show that peak pressure of dissociated gas is higher than that of gasoline, which increases by 6.2%--14.3% and 10.5%-- 21.5% respectively using Cu-based and Pd-based catalysts. Heat release rate of dissociated gas also in- creases. Pd-based catalyst dissociated gas gives the highest heat release rate. Compared with gasoline, cyclic variations increases slightly, and main combustion duration of Cu-based and Pd-based catalysts decreases by 4.8% and 7.1% respectively. Fuel economy of dissociated gas engine is better than that of gasoline engine while maintains 95% load to that of gasoline engine.

关 键 词：甲醇裂解气发动机 铜基 钯基催化剂 燃烧特性 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]