A thermodynamic origin for the Cohen-Kaplan-Nelson bound

The Cohen-Kaplan-Nelson bound is imposed on the grounds of logical consistency (with classical General Relativity) upon local quantum field theories. This paper puts the bound into the context of a thermodynamic principle applicable to a field with a particular equation of state in an expanding universe. This is achieved without overtly appealing to either a decreasing density of states or a minimum coupling requirement, though they might still be consistent with the results described.

A thermodynamic origin for the Cohen-Kaplan-Nelson bound

The Cohen-Kaplan-Nelson bound is imposed on the grounds of logical consistency (with classical General Relativity) upon local quantum field theories. This paper puts the bound into the context of a thermodynamic principle applicable to a field with a particular equation of state in an expanding universe. This is achieved without overtly appealing to either a decreasing density of states or a minimum coupling requirement, though they might still be consistent with the results described.

Thermodynamic Analysis of Ni-Al-WC System during Self-Propagating High Temperature Synthesis

Ni-Al-WC ternary system during self-propagating high-temperature synthesis (SHS) was analyzed and calculated based on thermodynamic principle, and the curves of adiabatic temperature (Tad) and preheating temperature (T0) and WC content (wt.%) were drawn. The results showed that adiabatic temperature of the system decreased with the increase of WC content and the maximum of WC content was about 34 wt.% for preheating temperature of 933K. Adiabatic temperature increased with increasing preheating temperature and properly increasing preheating temperature could promote the reaction self-sustaining when WC content was excessive and adiabatic temperature was less than 1912K.

Research on the Simultaneous Desulfurization and Denitrification of Fumes by Combining Ozone Oxidation and the Double Alkali Method

This paper introduced the fundamental principle of the simultaneous desulfurization and denitrification by combining ozone oxidation and the NaOH double alkali method. And the total chemical reaction equations were achieved by analyzing the process of the absorption of the productions of ozone oxidation by NaOH double alkali method. Then, based on thermodynamic principle, the partial pressure of SOx, NOx and CO2 when reactions reached equilibrium were calculated respectively. This paper also studied the reaction mechanism of the absorption of SOx and NOx and analyzed the absorption characteristic of SOx and NOx in absorption solution. The results showed that the simultaneous desulfurization and denitrification by combining ozone oxidation and NaOH double alkali method was feasible. Not only the elimination ratio of SOx and NOx were almost up to 100%, but also CO2 was removed on a considerable scale. The partial pressure of SOx and NOx was very important to the pH value of the absorption solution which affected the elimination ratio of SOx and NOx greatly.