Effects of Moisture and Hydrogen Content on the Heating Value of Fuels

Abstract

In this work, effects of moisture and hydrogen contents on lower heating value (LHV) of fuels were investigated. The LHV at constant pressure measures the enthalpy change of combustion with and without water condensed, respectively. Moisture in biomass generally decreases its heating value. Moisture in biomass is stored in spaces within the dead cells and within the cell walls. Higher heating value (HHV) of a fuel decreases with increasing of its moisture content. The LHV of a fuel increases with increasing of its hydrogen content. The LHV of a fuel depends on its oxygen content and the LHV of a fuel decreases with increasing of its oxygen content. The LHV of a fuel increases with increasing the hydrogen content due to cause combustion water. Moisture in a fuel generally decreases its HHV. The LHV of a fuel increases with increasing the sulfur content due to cause SO x gases absorbed by water.

Review of physicochemical properties and analytical characterization of lignocellulosic biomass

“…When biomass is burnt, the hydrogen present in biomass produces steam. If the products of combustion are condensed, the latent heat of condensation of steam also counted in the measured heat [108]. Thus, the HHV and LHV of biomass on as received basis can be calculated based on the HHV of biomass on dry basis according to Equations (20) and (21)…”

Characteristics of sago pith and sago bark waste from Seram Island, Maluku, Indonesia

“…In Gramineae plants, silica plays a role in straightening the leaves (Tripathi et al 2017) while in other plants, silica plays a role in increasing plant growth (Artyszak 2018). Silica in biomass can reduce the calorific value (Demirbas 2007) and dulls saw (Sommer et al 2015).…”

Relationships Between Specific Gravities and Higher Heating Values of Petroleum Components

“…Oxygen deficiency leads to incomplete combustion and the formation of many products of incomplete combustion (Demirbas, 1997(Demirbas, , 1998a(Demirbas, , 1998b(Demirbas, , 2004(Demirbas, , 2007a.…”

“…The results can be expressed on the as received or dry or dry and ash free basis. the enthalpy change of combustion with and without water condensed, respectively (Demirbas, 2004(Demirbas, , 2007a(Demirbas, , 2007b. Numerous mathematical equations have been created based on data from physical or chemical compositions, proximate or ultimate analysis, and structural analysis of fuel, including combustible elements (i.e., C and H; Demirbas et al, 1999;Demirbas, 2002a).…”