Ignition Quality of Biodiesel from Cottonseed and Soybean Oil

Abstract

The thermal analysis has been employed to yield information on the biodiesel ignition quality since the ignition quality influences the combustion and exhaust emissions of the fuels in a compression ignition (CI) engine. The chemical compositions of -10 petrodiesel (-10PD), soybean-based biodiesel (SME) and cottonseed-based biodiesel (CME) are analyzed by gas chromatography-mass spectrometry (GC-MS). Ignition temperature of -10PD, SME and CME is determined by thermogravimetry-differential scanning calorimetry (TG-DSC). The study shows that the biodiesel is mainly composed of fatty acid methyl esters: C14:0–C24:0, C16:1–C22:1, C18:2 and C18:3. Biodiesel ignition quality is better than petrodiesel. The ignition temperature of CME and SME is 207.4 and 213.9 °C respectively. The ignition quality of biodiesel is better with shorter carbon chain lengths and more saturated fatty acid methyl ester (SFAME).

Performance and emission analysis of single‐cylinder direct injection engine running with cottonseed‐ethyl oleate biodiesel blends

“…The NOx emissions are explicitly proportional to the growing chain span of monosaturated fatty acid methyl esters (FAME), according to Satpathy et al 13 They also discovered that HC and CO emission levels increase as chain length increases. The authors 10 believe that relatively short-chain FAME is favorable in aspects of emissions regulations. Various techniques, including the use of metal fillers, can reduce the proportion of NOx emissions.…”

“…8 A multitude of research findings has demonstrated that using biofuel in diesel engines significantly reduces ejected exhaust emissions due to the fuel's high oxygen level. 9,10 On the other hand, multiple studies have revealed that NOx emissions increase when a diesel engine runs on biodiesel. Carbonyl group content, heating value, and biodiesel concentration are the causes of the increase in NOx emissions.…”

“…Bio‐diesel with extra saturated constituents and relatively high oxygen levels exhibits low exhaust gas temperatures and lesser (carbon monoxide) CO and (hydrocarbon) HC emissions, though relatively high nitrogen oxide (NOx) emissions 8 . A multitude of research findings has demonstrated that using biofuel in diesel engines significantly reduces ejected exhaust emissions due to the fuel's high oxygen level 9,10 . On the other hand, multiple studies have revealed that NOx emissions increase when a diesel engine runs on biodiesel.…”

Evaluation of the performance and emission and spectroscopic analysis of an improved soy methyl ester

“…21 Lai et al have shown that the SME ignition quality is superior because of the presence of saturated bonds and short-length carbon chains. 22 In the present study, a soy methyl ester (SME) was blended with MO to investigate the engine performance and emission characteristics. The SME and its blends were also characterized using different techniques such as FTIR, UV and NMR spectroscopies.…”

“… 21 Lai et al have shown that the SME ignition quality is superior because of the presence of saturated bonds and short-length carbon chains. 22 …”