NO is the primary product of the oxidation of char nitrogen, and in some combustion processes the NO can be reduced on the char surface to give N2O and/or N2. In this study a range of bituminous coals (low, medium and high volatile matter content) were pyrolysed in a fixed bed reactor at various heating rates. Textural characterisation was carried out by measuring true (He) and apparent (Hg) de...

It is attempt in pulverized coal injection (PCI) in blast furnace tuyeres to increase the injection rate without increasing the amount of unburned char inside the stack of the blast furnace. The unburned char can cause problems in the blast furnace operation, such as reduced permeability, undesirable gas/temperature distribution, excessive coke erosion and significant char carryover. In the nea...

To improve our understanding of the combustion characteristics propyne, new experimental data for ignition delay times (IDTs), pyrolysis speciation profiles and flame speed measurements are presented in this study. IDTs propyne were obtained at equivalence ratios 0.5, 1.0, 2.0 ‘air’ pressures 10 30 bar, over a wide range temperatures (690–1460 K) using rapid compression machine high-pressure sh...

The expected increase in the use of environmentally friendly liquid fuels medium and heavy-duty compression ignition engines (for both off-road transport applications), together with well-documented benefits hydrogen-carriers to decrease energy dependence achieve a neutral-carbon economy (internal combustion highly contributing global CO2 emissions), have motivated this work. autoignition chara...

Combustion analysis has been conducted on a small two-stroke glow ignition engine, which has similar combustion characteristics to homogeneous charge compression ignition (HCCI) engines. Difficulties such as unknown ignition timing and the polytropic index have been addressed by combining both heat release and mass fraction burn analyses. Results for all operating conditions have shown good cor...

Different Ni-based oxygen carriers were prepared by dry impregnation using -Al2O3 as support. The reactivity, selectivity during methane combustion, attrition rate and agglomeration behaviour of the oxygen carriers were measured and analyzed in a termogravimetric analyzer and in a batch fluidized bed during multicycle reductionoxidation tests. * Manuscript

Introduction In order to overcome the pollutant emission limitations the use of homogeneous charge compression ignition (HCCI) mode must be considered in direct injection diesel engine using biodiesel fuel. HCCI mode reduces PM and NOx emissions without penalize the performances [1]. This occurs because the combustion develops with low temperature and burns a premixed air/fuel mixture. Biodiese...

In this paper, major factors influencing the power output from a gas engine are utilized to predict the power output from a diesel engine converted to gas operation using various gaseous fuels. The primary factors chosen are the gas calorific value, compression ratio, and molar changes due to combustion; leading to changes in peak pressures, peak temperature, turbo charger pressure and finally ...