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Abstract: The effect of temperature on reaction of H2S with carbon structures of a coke were studied in a fixed-bed quartz tube reactor coupled with two parallel detectors, flame photometric detector (FPD) and mass spectrum (MS). The uptake of H2S with the coke matrix was studied through a sulfur uptake/temperature programmed desorption process (SU/TPD) and a temperature programmed oxidation process (TPO). The results show that the sulfur imbibed by a demineralized coke at elevated temperatures is very stable, which can only be decomposed and released to gas phase under combustion conditions. The chemical imbibition of sulfur takes place at an elevated temperature. At relatively lower temperatures, H2S was adsorbed physically by the sample and then transformed to stable sulfur species. At higher temperatures, the chemical reactions between H2S and DM-Coke led to the formation of more stable sulfur-containing forms and consequently increased H2S uptake ability. This is essence of the temperature effect on the uptake of H2S by a de-mineralized coke. The irregular behavior with the temperature was caused by the different interactions. [Copyright &y& Elsevier]

Abstract: The effect of temperature on reaction of H2S with carbon structures of a coke were studied in a fixed-bed quartz tube reactor coupled with two parallel detectors, flame photometric detector (FPD) and mass spectrum (MS). The uptake of H2S with the coke matrix was studied through a sulfur uptake/temperature programmed desorption process (SU/TPD) and a temperature programmed oxidation process (TPO). The results show that the sulfur imbibed by a demineralized coke at elevated temperatures is very stable, which can only be decomposed and released to gas phase under combustion conditions. The chemical imbibition of sulfur takes place at an elevated temperature. At relatively lower temperatures, H2S was adsorbed physically by the sample and then transformed to stable sulfur species. At higher temperatures, the chemical reactions between H2S and DM-Coke led to the formation of more stable sulfur-containing forms and consequently increased H2S uptake ability. This is essence of the temperature effect on the uptake of H2S by a demineralized coke. The irregular behavior with the temperature was caused by the different interactions. [Copyright &y& Elsevier]

Microalgae is a single-cell organism with the characteristics of high light energy utilization rate, fast growth rate, high-value bioactive components and high energy material content. Therefore, microalgae has broad application prospects in food, feed, bioenergy, carbon sequestration, wastewater treatment and other fields. In this article, the microalgae biotechnology development in recent years were fully consulted, through analysis from the literature and patent. The progress of microalgal biotechnology at home and abroad is compared and discussed. Furthermore, the project layout, important achievements and development bottlenecks of microalgae biotechnology in our country were also summarized. At last, future development directions of microalgae biotechnology were discussed.