The membrane permselectivity operating in H2S/complex mixtures with around 32 ppmv of H2S in CH4, CO, CO2 and H2 was also tested.
With values between 0.01 and 1.04% in the GC data and 0.04 and 4.98% in the QMS data, C1 was also the dominant gas species in the shorebased data, followed by C2-GC (2 – 18 ppmv) and C3-GC (2 – 4 ppmv) (Table 2).
Figure 7 Binary diagram of 13 δ C (CO 2 ) versus 1/[CO 2 ] (ppmV −1 ).
Another set of specimens were exposed in impure helium containing 1 ppmv CO2, 2 ppmv O2, 35 ppmv CH4, 250 ppmv CO and 400 ppmv H2 at 750 °C for up to 1000 h.
The feed gas used was 500 ppmv NO, 500 ppmv C3H6, 1400 ppmv CO, 8% O2, 10% H2O, and the balance helium.
A 10 ± 2 ppmv H2 standard (Air Liquide) was used for calibration.
A 99.9 ± 2 ppmv CH4 standard was used for calibration (Air Liquide).
A target of 650 ppmv CO2-e can be met with delayed participation for a more affordable cost.
The linearity of the photoacoustic signal dependency on the analyte concentration was verified from 200 ppbV to 100 ppmV NO2.
Scientists have argued that severe consequences will occur once atmospheric CO2 concentrations reach between 450 and 600 ppmv [5 7].
Indicative CO2 levels of 800 ppmv, 1000 ppmv and 1200 ppmv corresponding to 83%, 97% and 99.7% survey samples were shown, corresponding to the thermal energy consumptions of 1500 MJ m−2 yr−1, 960 MJ m−2 yr−1and 670 MJ m−2 yrespectivelyively.
