The phrase "a volatile matter" is correct and usable in written English.
It can be used to describe a situation or topic that is unstable, unpredictable, or subject to rapid change.
Example: "The negotiations surrounding the treaty have become a volatile matter, with tensions rising between the involved parties."
Alternatives: "an unstable issue" or "a contentious topic".
moisture (M), ash (A), volatile matter (VM) and fixed carbon (FC) are presented in Table 1.
These suggest that only the Shankodi-Jangwa coal sample, with a volatile matter content of 29.69% (Table 1), falls within the acceptable range for metallurgical coke making.
It has been found that regardless the process operational parameters, a total waste tyre devolatilisation is achieved, producing a pyrolytic carbon black with a volatile matter content under 5 wt.%.
HHV = 19.2880 - 0.2135 · VM / FC + 0.0234 · FC / A - 1.9584 · A / VM (3)where, VM, FC, and A were volatile matter, fixed carbon, and ash content of biomass, respectively, by dry weight basis.
Biomass generally contains a high volatile matter content of around 70% to 86% and low char content.
Table 1 Physicochemical properties of L. japonica Proximate analysis (wt.%) Ultimate analysis (wt.%)a HHV (MJ/kg) Water Volatile matter Fixed carbon Ash C H O b N S 7.65 53.10 10.97 28.28 30.62.4489 62.44 1.51 0.56 6.41 aOn ash-free basis; bby difference.
The fixed carbon has been increased from 45.66 wt% to 68.89 wt%, accompanied by a reduction of volatile matter from 36.90 wt% to 24.26 wt%.
The results primarily showed that the enhanced drag force on the biomass particles caused a late release of volatile matter and resulted in a delay in the ignition of the fuel air mixture, and the maximum flame diameter was mainly affected by the volatile content of the biomass materials.
The proximate analyses presented in Table 1 show a low amount of moisture and volatile matter, and a relatively low amount of ash content, indicating that the particle density is relatively small and that the biomaterial should be an excellent raw material for adsorbents to be used in column or fixed-bed reactors (Ekpete and Horsfall 2011).
Sample 13 has a slightly higher % volatile matter (8.86 % vs. 6.15) than 12, but a lower calculated fixed carbon (67.8 vs. 75.1).
The water hyacinth briquette has higher ash content and a lower percentage of volatile matter compared to other briquettes.
