Gas Treatment Unit Research Articles

96/03656 Catalysts for hydrogenation of heavy oils and hydrogenation of heavy oils using them

Presently, most of the acid gas (H2S) streams from amine gas sweetening and refinery upgrading operations are treated using the modified Claus process. In this process, sulfur and low-quality steam are produced by partial oxidation of H2S. Despite the modified Claus process's success in accomplishing the above tasks, it still has some disadvantages. Additional tail gas treatment unit is needed to improve its efficiency. Also, a valuable commodity, hydrogen, is not recovered.In this work, a process simulation study on the Idemitsu Kosan Co. Fe–Cl hybrid process is carried out. The process is capable of producing sulfur and hydrogen from H2S gas streams. The process was modeled and validated using pilot-scale plant data before been scaled up using the typical acid gas composition profile of one of Abu Dhabi's sulfur recovery plants. The effects the absorber solution flow rate and concentration have on the process’ operability were investigated. Operating at high ferric ions concentration was found to be more beneficial compared to high solution flow rate operations. The ferrous ion constituent of the solution proves to be instrumental in the downstream electrolysis process. Cost estimates of the process indicate the suitability of the process to be implemented in Abu Dhabi gas plants to produce sulfur, and most importantly, hydrogen to be used as fuel or chemical feedstock.

Neunburg vorm wald — Test centre for solar hydrogen technology

In Neunburg vorm Wald, eastern Bavaria, Germany, an industrial-sized solar hydrogen demonstration plant has been set up, and this plant is of some importance in the world of renewable energy. In the course of the long-term project, mainly prototype components of a possible future energy economy based on hydrogen as an energy medium are tested in their performance and interaction. The overall plant consists of photovoltaic generators, electric power conditioning, water electrolysers, gas treatment and storage units, as well as an LH 2-filling station and other application technologies like heating boilers, a catalytically operated heater/refrigerator and fuel cell plants. The present paper, as of July 1993, is a report on the realization of the first project phase, the operating experience, and also elaborates on the planning status of the current second project phase.