In this work, the effect of carbon dioxide partial pressure on the calcination kinetics of high purity zinc carbonate hydroxide has been studied. Non-isothermal analysis has been performed on samples at different CO2 partial pressures by TGA and DTA. It has been found that the calcination behaviour of this material corresponds to the shrinking core model and the reaction mechanism is phase boun...

In this paper, Ni/Al and La-Ni/Al catalysts were prepared with a co-impregnation method and employed in carbon dioxide methanation reaction. The catalytic results showed that the catalyst with (10wt.%) of lanthanum and (20wt.%) nickel had the highest activity at low temperatures in CO2 methanation and the La-Ni/Al catalysts changed the reaction path by lowering its activation energy and consequ...

Exhaled breath condensate (EBC) pH is considered to reflect the acid-base balance of the airways. Current pH measurements do not take into account the effect of CO2. The aim of the present study was to determine the effect of condensate CO2 partial pressure on pH and to provide a more precise mode of EBC pH determination. Condensate pH and CO2 partial pressure were measured in parallel from 12 ...

7 Even though an increasing number of pilot-scale plants are demonstrating the potential ef8 ficiency of the Ca-looping technology to capture CO2 at a commercial level, a still standing 9 matter of concern is the loss of carbonation reactivity of the regenerated CaO by calcination, 10 which is expected to be particularly marked at realistic conditions necessarily implying a high 11 CO2 partial ...

The solubility of CO2 in various aqueous amine based solvents was determined at lower CO2 partial pressures. Cyclic capacity of various potential aqueous amine based solvents at 10 kPa CO2 partial pressure was determined by performing CO2 absorption at 30C, regeneration at 90C and at 1 atmosphere. 1,7-Diaminoheptane and 1,6Hexanediamine, N,N'-dimethyl was found to be having high cyclic loading ...

Objective: This study is to explore the impact of different pressure of artificial pneumothorax on surgical exposure and patients’ respiratory and circulation in thoracic esophageal laparoscopic surgery. Method: The 60 esophageal cancer patients were randomly divided into 2 groups: the experiment group (single lumen endotracheal intubation with artificial pneumothorax pressure of 9 mmHg) and th...

BACKGROUND A non-invasive means of measuring pulmonary blood flow (PBF) would have numerous benefits in medicine. Traditionally, respiratory-based methods require breathing maneuvers, partial rebreathing, or foreign gas mixing because exhaled CO2 volume on a per-breath basis does not accurately represent alveolar exchange of CO2. We hypothesized that if the dilutional effect of the functional r...

Abbreviations: CO2, Carbon dioxide; PaCO2, Arterial partial pressure of carbon dioxide; PtcCO2, Transcutaneous partial pressure of carbon dioxide; PetCO2, End-tidal partial pressure of carbon dioxide; NETS, Newborn Emergency Transport Service (Victoria); NICU, Neonatal Intensive Care Unit; PaO2/PAO2 ratio, alveolar-arterial ratio. ADC-FNN Online First, published on April 29, 2005 as 10.1136/adc...

We determined the effect of alterations in coronary arterial PCO2 on coronary vascular resistance (CVR) at a constant coronary sinus (CS) PO2 and the effect of coronary arterial PO2 variation on CVR at a constant CS PCO2. A linear but opposing effect on CVR was found for both gases. The sensitivity of CVR to O2 change, represented as CVR/CS PO2, was approximately twice that of the ratio CVR/CS ...