Wetting carbonation

Bartell and co-workers report the following capillary pressure data in porous plug experiments using powdered carbon. Benzene, which wets carbon, showed a capillary pressure of 6200 g/cm. For water, the pressure was 12,000 g/cm, and for ben-... 

Early experimental work on the oxidation of carbon monoxide was confused by the presence of any hydrogen-containing impurity. The rate of CO oxidation in the presence of species such as water is substantially faster than the bone-dry condition. It is very important to realize that very small quantities of hydrogen, even of the order of 20 ppm, will increase the rate of CO oxidation substantially [8], Generally, the mechanism with hydrogen-containing compounds present is referred to as the wet carbon monoxide condition. 

Kumari D. 1990. Chemical analysis of filtrate and condensate from wet-carbonized peat by gas chromatography-mass spectrometry. Inter J Coal Geol 15 63-69. 

Carbon tetrachloride (melting point -23°C, boiling point 76.7°C, density 1.5947, critical temperature 283.2°C, critical pressure 9714 psi - 67 MPa, solubility 0.08 g in 100 g water) is a heavy, colorless, nonflammable, noncombustible liquid. Dry carbon tetrachloride is noncorrosive to common metals except aluminum. When wet, carbon tetrachloride hydrolyzes and is corrosive to iron, copper, nickel, and alloys containing those elements. 

Maximum corrosion allowance. Primarily used for wet carbon dioxide equipment when the carbon dioxide partial pressure is less than 4 psf (30 kPa) and for sour water equipment when the hydrogen sulfide partial pressure exceeds 10 psi (70 kPa)... 

The first application of the polynomial approximation to combustion systems describes the temperature and CO and O2 concentration profiles during the ignition of a wet carbon monoxide-air mixture. The detailed mechanism was identical to the CO mechanism that has been used as an example in ILDM calculations [6]. All in all, 300 initial conditions, uniformly distributed between ambient temperatures of 990 and 1010 K and fuel-to-oxygen ratios 0.5 to 1.5, were used in spatially homogeneous simulations. Temperature and mole fractions of CO and O2 were recorded every... 

Dehydrogenation of pyrimido[4,5-d]azepines 532,540 (R = Ph), 543, and 548 (R = Ph) was unsuccessful over palladium-on-carbon catalyst in boiling decalin or with 2,3-dichloro-5,6-dicyano-l,4-benzoquinone (DDQ) in boiling dioxane. However, when pyrimido[4,5-6] azepine 549 was treated with palladium-on-carbon catalyst, dihydropyrimido[4,5-6]azepines 551 and 552 could be isolated chromatographically in 10 and 5% yields, respectively (78H275). When pyrimido[4,5-6]azepine 549 was heated in dioxane in the presence of DDQ, 5,6-dihydropyrimido[4,5-overall yield when pyrimido[4,5-carbon tetrachloride, and the resulting bromohydrin 553 was reduced with zinc powder in acetic acid at 60°C. Acetylation of the bromohydrin with acetic anhydride in pyridine gave the more stable acetoxy derivative 554. 

Bromo-8,9-dihydropyrimido[4,5-carbon tetrachloride in the presence of catalytic amounts of acid. 5-Bromo-5,6-dihydropyrimido[4,5-[Pg.168]

Methods of filler pretreatment silane treatment of wollastonite polyamide has ability to wet carbon fiber, polyamide behaves like a melt at 180°C even though its melting temperature is 225°C 5... 

Hirasaki, G.J., Zhang, D.L., 2004. Surface chemistry of oil recovery from fractured, oil-wet, carbonate formations. SPE J. (Jtme), 151—162. 

By 1985 the SCF community had developed and accumulated substantial combined knowledge in fundamental behavior, application, and production. But when this paper was published, it resulted in some discussion and confusion within the community. It was our opinion at that time that the sodium salt of p-nitrophenyl phosphoric acid could not dissolve in supercritical carbon dioxide, and this opinion was later confirmed in tests on the solubility of the sodium salt of p-nitrophenyl phosphoric acid. Krukonis and Hammond carried out tests to measure the solubility of the salt in dry carbon dioxide and to investigate if there could be some cosolvent effect of water in water-saturated carbon dioxide. They found that the solubility was virtually nil, i.e., the salt could not be detected by UV analysis of the extracts in the collection vessel, and there was no visible extract. On the basis of the insolubility of the salt in dry or wet carbon dioxide from the solubility tests, the authors... 

This solution contains approximately 8% Cu, 2% Cr and 0.05% Ag. Ammonia and ammonium carbonate are added to enhance solubillfy. The carbon is added to this solution (at 308K). After a sufficient equilibration time the wet carbon is removed and mixed with dry impregnated carbon, in order to absorb excess impregnation solution, Tlien the carbon is... 

Calcium bisulfide Calcium bisulfite Calcium carbonate Calcium chlorate Calcium chloride Calcium hydroxide, 10% Calcium hydroxide, sat. Calcium hypochlorite, 10% Calcium nitrate Calcium oxide Calcium sulfate Caprylic acid Carbon bisulfide Carbon dioxide, dry Carbon dioxide, wet Carbon disulfide Carbon monoxide Carbon tetrachloride Carbonic acid Cellosolve... 

Carbon dioxide, dry Carbon dioxide, wet Carbon disulfide X X... 

It is difficult to wet carbon fibers with molten Al due to the presence of AI2O3 at the liquid vapor interface. Ignoring the effect of such oxides, the pressure difference at the liquid metal front resulting from capillarity effects is given by a version of Kelvin s equation [148-150,189] ... 

This article focuses on the influence of the addition of water on oxidation in carbon dioxide compared to the calculated changes using a model for supa-critical water oxidation. This is carried out in ord to test if this model is suitable for describing the oxidation in carbon dioxide and wet carbon dioxide. 

Ehiring our investigations of the oxidation in supercritical carbon dioxide, water and carbon dioxide, more than 500 experiments were conducted in the temperature range of 300 -550°C, with reaction times between 10-50 seconds and with the model compounds methanol, ethanol, toluene, triethanolamine, formic acid, acetic acid, and formaldehyde. Usually the differences between reactions in supercritical watCT, supa-critical carbcMi dioxide and wet carbon dioxide are rath small but in some cases they are significant and interesting (to be published elsewhere, see also [5]). Complete conversion as in the case of SCWO can be reached in supercritical CO2 as well [5], so a coupling of extraction and oxidation is of into est for application. 

---