Huiqi Hou | PubMed Health

PubMed2006

Investigation of a new approach to decompose two potent greenhouse gases: photoreduction of SF(6) and SF(5)CF(3) in the presence of acetone.

In this paper, we addressed the utilization of photochemical method as an innovative technology for the destruction and removal of two potent greenhouse gases, SF(6) and SF(5)CF(3). The destruction and removal efficiency (DRE) of the process was determined as a function of excitation wavelength, irradiation time, initial ratio of acetone to SF(5)X (X represented F or CF(3)), initial SF(5)X concentration, additive oxygen and water vapor concentration. A complete removal was achieved by a radiation period of 55min and 120min for SF(6)-CH(3)COCH(3) system and SF(5)CF(3)-CH(3)COCH(3) system respectively under 184.9nm irradiation. Extra addition of water vapor can enhance DRE by approximately 6% points in both systems. Further studies with GC/MS and FT-IR proved that no hazardous products such as S(2)F(10), SO(2)F(2), SOF(2), SOF(4) were generated in this process.

Acetone↗

PubMed2002

[The conversion from CS2 to COS by spark discharge].

Spark discharge method was used to take simulative investigations on the conversion reaction from CS2 to COS by lightning. The results showed that 1.33 x 10(3) Pa CS2 could act with O2 or H2O in the atmosphere (25 degrees C, 10(5) Pa) under electric discharge conditions (V = 3000 V), and COS was produced as well as other species such as CO, CO2, SO2 and so on. Factors such as CS2 concentration, water vapor and discharge time played important roles in the formation of COS. Based on these results and several theories, possible mechanisms of correlative processes during thunderstorms were proposed here, which could contribute to give evidence for the conversion from CS2 to COS by lightning during thunderstorms.

Carbon Disulfide↗