Treatment Of CO2 Research Articles

X-ray diffraction structure of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2[: proof for diphosphine ligand chelation

Treatment of the dicobalt compound Co2(CO)6(μ-PhC≡CH) (1) with the unsaturated diphosphine ligand (Z)-Ph2PCH=CHPPh2 gives the chelating diphosphine compound Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] (2) when the reaction is carried in refluxing 1,2-dichloroethane or in the presence of Me3NO. 2 was characterized in solution by IR and 31P NMR spectroscopy, and the molecular structure of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] was established by X-ray diffraction analysis, which confirmed the chelation of the P-ligand to a single cobalt center. Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] crystallizes in the monoclinic space group P21/c, a = 10.151(1), b = 32.694(5), c = 11.051(5) A, β = 111.14(1)°, V = 3420.7(9) A3, Z = 4, and dcalc = 1.414. The two distinct 31P resonances found in the 31P NMR spectrum of 2 are discussed relative to the X-ray structure and other structurally similar cobalt–alkyne complexes. Thermolysis of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] led only to the slow decomposition of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] and not to the formation of the isomeric bridged-diphosphine complex.

A Study on the Treatment of CO2, SO2, Nox, and Fly Ash by Pulse Activation

ABSTRACT This paper presents a technique for the complete, simultaneous decomposition of CO2, SO2, and NOx, as well as the simultaneous removal of fly ash by ultra-high voltage pulse activation. Ultra-high voltage narrow pulse is used to make the gases in the reactor become active molecules, which are then dissociated into nonpoisonous gas molecules and solid particles under the control of a directional reaction model. By using a sufficient charge and a strong electric field, the fly ash can be removed. It becomes the carrier of C and S, and its efficiency is 99.5%. Owing to the action of catalyst B (using Ni as the mother's body), the activation energy of CO2, SO2, and NOx gases is reduced in great magnitude, and their removal efficiency can reach 75~90% at normal pressure and 180 °C.

Co2(CH2=C=O)(CO)7 as an Active Intermediate for Cobalt-catalyzed Alkoxycarbonylation of CH2Br2

Abstract The dicobalt ketene complex, Co2(CH2=C=O)(CO)7, in which the CH2=C=O ligand coordinated to one of the cobalt atoms by η2-(C,C) manner, was cleanly isolated by the treatment of Co2(CO)8 with CH2Br2 in the presence of Zn, and promoted catalytic alkoxycarbonylation of CH2Br2.

Vegetation Community Selection by Ungulates on the Isle of Rhum. II. Vegetation Community Selection

The effects of doubled CO2 concentration on non-structural carbohydrate metabolism of cucumber (Cucumis sativus L. cv. 'Jinyou No.1') seedlings under drought stress were investigated. Split plot design was deployed, with two levels of CO2 concentrations (ambient CO2 concentration, 380 µmol . mol-1, and doubled CO2 concentration, 760±20 µmol . mol-1) in the main plots, and three levels of water treatments (control, moderate drought stress, and severe drought stress) simulated by PEG 6000 in the split-plots. The results showed that non-structural carbohydrates of cucumber leaves, including glucose, fructose, sucrose, and stachyose, increased with the doubling of CO2 concentration, which resulted in the decreased osmotic potential, improving the drought stress in cucumber seedlings. During the drought stress, sucrose synthase, soluble acid invertase and al- kaline invertase started with an increase, and followed with a decline in the leaves. In the root system, however, soluble acid invertase and alkaline invertase increased gradually throughout the whole process, whereas sucrose phosphate synthase firstly increased and then decreased. The treatment of doubled CO2 enhanced the activity of sucrose synthase, but decreased the activity of sucrose phosphate synthase. The synergistic action of the two enzymes and invertase accelerated the decomposition of sucrose and inhibited the synthesis of sucrose, leading to the accumulation of hexose, which lowered the cellular osmotic potential and enhanced the water uptake capacity. In conclusion, doubled CO2 concentration could alleviate the adverse effects of drought stress and improve the drought tolerance of cucumber seedlings. Such mitigating effect on cucumber was more significant under severe drought stress.

Über die Darstellung neuer Kobaltcarbonyl-Komplexe mit 1-Diphenylphosphino-2-diäthylaminoäthan / Syntheses of New Cobalt Carbonyl Complexes with 1-Diphenylphosphino-2-diethylaminoethane

By treatment of Co2(CO)8 with 1-diphenylphosphino-2-diethylaminoethane, Ph2P-CH2-CH2-NEt2 (P͡N), [Co(CO)3(P͡N)2][Co(CO)4] or Co2(CO)6(P͡N)2 are formed, depending on the reaction conditions. The complex Co2(CO)4 (nor-C7H8)2 also reacts with P͡N to give the substituted cobalt carbonyl Co2(CO)6(P͡N)2. Insertion of SnCl2 and the II B group metals into the Co-Co bond is possible.

Dinitrosycobalt nitrite: synthesis and X-ray crystallographic structural studies of a cobalt nitrosyl with bridging nitrite groups

Treatment of Co2(CO)8 with and excess of NO in hexane solution results in the formation of Co(NO)2NO2 which has been characterized by an X-ray crystal structure determination and by i.r. studies in the solid state and in solution.

熔鋼に於ける炭素と酸素との平衡並に水素還元に依る鋼中の酸素定量法

In the main part, author treats the equilibrium of Fe-C-O2-system at steel making temperatures by melting carbon and oxygen bearing iron in the gas stream of carbon mono-oxide and dioxide mixture. As the results of his experiment, it was proved that the oxygen content of the molten steel in equilibrium with the gas phase, is proportional to the ratio pco2/pco, and carbon content to p2co/pco2. On these accounts, he proposed that the two equilibriums, FeO(Fe)+CO=Fe+CO2 and C(Fe)+CO2=2CO, should be considered simultaneously as the carbon-oxygen equilibrium in steel making process instead of FeO(Fe)+C(Fe)=Fe+CO as was usually accepted. Further he constructed also the equilibrium diagram of Fe-C-O2-system qualitatively in the region of molten steel.As an appendix of his main paper, he described the hydrogen reduction method of oxygen determination in iron and steel. Some remarkable points of his method of determination are in the treatment of reduction products, H2O, CO2 and CO. Here H2O was absorbed by P2O5 and CO2 by soda lime as usually, CO is oxidized by I2O5 to CO2 selectively and after retaining free iodine with metallic copper chips, secondary formed CO2 absorbed by soda lime and weighed.