Detail of "12795-06-1"

Reference

Pyrolyzed products of coal rapidly heated on a molten slag

Pyrolyzed products of coal rapidly heated on a molten slag. Kawamura, Takafumi; Ishikawa, Hidetake (Process Technol. Res.Several substances are used for example 7439-89-6 which is its cas registry number. Lab., Nippon Steel Corp., Futtsu 299-12, Japan). Tetsu to Hagane, 78(3), 360-6 (Japanese) 1992. CODEN: TEHAA2. ISSN: 0021-1575. DOCUMENT TYPE: Journal CA Section: 54 (Extractive Metallurgy) Section cross-reference(s): 51 By analyzing the pyrolysis products such as gas, tar, and residual char, data were obtained as a function of coal rank (eleven coals and one metallurgical coke), temp. (1350-1500 °C), gas residence time (2.5-10 s), and coal diam. (0.8-7.0 mm) in the expts. using high frequency induction furnace. Carbon oxide gas (CO + CO2) and hydrocarbon gas (CH4-C3H6) yields increased with increasing O content and H/C at. ratio in parent coal, resp. The effect of coal diam. and slag temp. on total volatiles did not become significant. The ratio of S and N retained in residual char to total S and N contained in parent coal decreased with increasing volatile matter of coal. Normalization of the data, by taking the ratio of S and N released to total volatiles released, indicated that S and N in all coals were preferentially retained in volatiles and showed the max. retention at ~C=85% coal. .

Carbon oxides and hydrogen in Antarctic atmosphere

Carbon oxides and hydrogen in Antarctic atmosphere.Some chemicals with cas registry numbers like 630-08-0 and 1333-74-0 are also used. Corazza, Egizio; Tesi, Gino (Ist. Geocronol. Geochim. Isot., CNR, Pisa, Italy). Ann. Chim. (Rome), 81(7-8), 439-51 (English) 1991. CODEN: ANCRAI. ISSN: 0003-4592. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) During the 1989-90 Italian expedition to Antarctica (Terra Nova Bay) some atm. trace components (CO2, CO, H) were analyzed at a location ~0.6 km NW of the base. Air samples were analyzed in situ at 3 h intervals. Concns. of H and CO2 (av. 531 ppb and 354 ppm, resp.) are representative of the worldwide ones, thus reflecting their long lifetimes; CO instead is low (short lifetime) and comparable with the high latitude, open sea results (av. 55 ppb). Concns. of CO were dependent on wind direction; continental winds were assocd. with the lowest concns. (av. 51 ppb). The results contribute to the knowledge of trace gas distributions (namely CO) in remote areas, where few data are available (open oceans, polar regions). These areas are the only ones which to a certain extent can represent the background values with respect to inhabited areas, where man-induced distribution dramatically changes the natural levels. .