Transesterification Kinetics and Performance Characterization of Water Hyacinth Biodiesel
Evaluates water hyacinth, a noxious aquatic weed, as an accessible feedstock for rural biofuel self-sufficiency and for less dependence on imported petroleum.
Research
Bioenergy systems
Biodiesel from water hyacinth, biomass gasification, and green hydrogen from organic waste.
Why it matters
Biomass is plant and organic waste: crop residue, aquatic weeds, farm and food waste. Turned into fuel, it can replace part of the petroleum burned in engines and heaters, using material that is often left unused.
A bioenergy route earns its place only if it works locally, with feedstock that is close at hand and at a scale that a rural community or a small processor could run.
Whether a route is low-carbon depends on how the feedstock is gathered, moved and processed, so the whole chain has to be counted. The Impact page sets out the lifecycle view we aim to apply.
Water hyacinth biodiesel
Water hyacinth is an aquatic weed that clogs ponds, canals and reservoirs. Extraction recovers the lipids in the plant, and transesterification converts them into biodiesel by reacting them with an alcohol, leaving glycerol as a by-product. The work aims at high-cetane renewable blends for diesel engines.
Biodiesel is judged on properties such as cetane number, viscosity and behaviour in cold weather. Cetane number describes how readily a fuel ignites in a diesel engine; a higher number means a shorter ignition delay. The questions here are practical: how fast the reaction runs, how the fuel performs, and whether the weed can be gathered and processed close to where the fuel is used.
Biomass gasification and green hydrogen
Gasification heats biomass with a limited supply of air, oxygen or steam, so that it turns into a combustible gas instead of burning outright. That gas is a mixture that includes hydrogen, carbon monoxide and methane, and it can fuel an engine or be processed further. Its composition depends on the feedstock, the gasifying agent and the temperature, and tar and fine particles have to be removed before the gas reaches an engine.
One route to green hydrogen from organic waste biomass is to clean the product gas and separate the hydrogen from it. The result replaces hydrogen made from fossil gas with hydrogen from a renewable, waste-derived source, and it can feed the dual-fuel engines described under clean combustion and fuels.
How we work
- Synthesis protocols. Extraction and transesterification routes that convert water hyacinth into biodiesel and high-cetane blends.
- Gasification experiments. Original experimental investigations of biomass gasification.
- Bioenergy modelling. Chemical-kinetics modelling, checked with the protocols of the computational lab.
Research topic