公共话语权视域下的草根微博:“成名的想象”

Comparative experimental study on carbon removal by aqueous ammonia or MEA under oxy-enrich combustion

热门微博的发布者大多是精英用户，但有一些例子表明：草根用户的某些微博也可能得到大量转发和评论，使草根用户获得暂时的“成名的想象”。本文采集热门微博中由草根用户发布的微博样本，对其主要议题、感情色彩、公共性等方面进行分析。研究发现：草根用户掌握公共话语权仍是一种假象；草根用户通过某条微博获得的“名声”只是暂时的，且其“成名”方式大多是通过私人化和娱乐化的微博话语。

Experimental studies on decarbonization by aqueous ammonia under oxy-enrich combustion flue gas( 30 %~ 40 % v /v CO2) in a packed column are carried out compared with MEA. Effects of different operating and design parameters on CO2removal efficiency,including concentration of CO2,concentration of aqueous ammonia,aqueous ammonia flow rate,flue gas temperature,total gas flow rate and mole ratio of NH3to CO2are investigated. The research results show that when the concentration of aqueous ammonia is 6 %,and the CO2concentration is from 10 %( V/V) to 35 %( V/V),there is little change in removal efficiency. Improving concentration of aqueous ammonia and increasing flow rate of aqueous ammonia can increase removal efficiency of CO2respectively. When gas temperature is 50 ℃,the removal efficiency is the highest,and increasing flow rate of simulated flue gas can decline the removal efficiency. With the mole ratio of NH3to CO2increasing,the removal efficiency increases,and the magnitude of increase slow down. Under comparable conditions,by comparing,the results show that carbon removal by aqueous ammonia is better than MEA.