How do we Tweet? The Comparative Analysis of Twitter Usage by Message Types, Devices, and Sources

Facing the growing importance of social media in the marketing field, this study is intended to build a better understanding of Twitter usage. A total of 73,192 tweets were examined by message types, devices and platforms used. Instead of relying on the audience’s response (e.g., survey or experiment) or traditional content analysis, this study used a data-mining approach and software that are widely used in the computer science field. Overall findings indicate that individual users prefer mobile devices to desktops and use more official web pages or mobile applications provided by Twitter when they tweet, and their most popular message type was the Singleton, an undirected message with no specific recipient. However, we also found that tweets generated through business sources were different from those through official sources in terms of message type, devices, and the nature. The implications of these findings were discussed

Advanced CO2 Capture Process Using MEA Scrubbing: Configuration of a Split Flow and Phase Separation Heat Exchanger

AbstractCO2 capture process using aqueous Monoethanolamine (MEA) scrubbing is a well-proven and commercially-ready technology for reducing CO2 emission to the atmosphere. Although the MEA scrubbing is the one of the most suitable technologies for post-combustion CO2 capture, the MEA process has a critical problem which is high consumption of reboiler heat energy for solvent regeneration. In order to reduce the reboiler heat requirement, this paper suggests an advanced configuration of MEA process which consists of split flow and a phase separation heat exchanger. The split flow permits to reduce the reflux ratio in the stripper and the phase separation heat exchanger permits to alleviate preheating duty loss. As a result, the regeneration energy of the advanced process is reduced by 2.84GJ/ton CO2, which is lower than one of the reference process by 27%.CO2 capture; post combustion CO2 capture; advanced stripper configuration; cold solvent split; rich vapor compressio