Ammonium carbamate energy storage

Can ammonium carbamate be used as a high energy density?

The Use of Ammonium Carbamate as a High Energy Density... HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button. Phase change materials (PCMs) often have higher specific energy storage capacities at elevated temperatures.

Is ammonium carbamate an expendable heat sink?

In this paper, we introduce and demonstrate a thermal management system (TMS) architecture integrating a vapor compression heat pump, phase change thermal energy storage, and heat exchanger-reactor (HEX reactor) to utilize the endothermic decomposition of ammonium carbamate as an expendable heat sink.

What is the enthalpy of ammonium carbamate?

The compound ammonium carbamate, [NH 4] [H 2 NCOO], is a solid formed from the reaction of ammonia and carbon dioxide which endothermically decomposes back to CO 2 and NH 3 in the temperature range 20-100°C with an enthalpy of decomposition of ∼2,000 kJ/kg.

Can graphite foams be used as alternative materials for thermal energy storage?

Progress on material and system characterization is reported. K. Lafdi, O. Mesalhy, and A. Elgafy, “Graphite foams infiltrated with phase change materials as alternative materials for space and terrestrial thermal energy storage applications,” Carbon 46 159–68 (2008).

Does conversion of ammonium carbamates to carbamic acid dimers affect carboxylic aggregates?

While the conversion of ammonium carbamates to carbamic acid dimers is generally accompanied by a marked increase in the stretching frequency of the carbonyl signal 47, 48, the observed decrease (Supplementary Fig. 28) agrees with reports about higher carboxylic aggregates (Supplementary Fig. 29) 13.

Is scrubbing possible with half-loaded ammonium carbamate adduct pairs?

Despite decades of research and calls for change 3, 4, scrubbing is unlikely to advance with current half-loaded ammonium carbamate A (0)+A (1)1– and ammonium bicarbonate A (0)+W (1)– adduct pairs (Fig. 1a,e for notation). Fig. 1: Conventional versus unconventional CO2-binding adducts with increasing CO2/amine-A stoichiometry.