How much does it cost to utilize biofuel?
Carbon offsets could be generated by any type of project that reduces or eliminates greenhouse gas emissions beyond a business-as-usual scenario. Common forms of offset projects include reforestation and improved forest management, methane gas capture and destruction, fuel switching, clean cookstoves, and energy efficiency. There are many more types of projects that can generate carbon offsets however. To get a feel for what project types exist, go to the methodologies page for the standards mentioned above.
The most common kinds of biofuels are biodiesel, from oil-rich plants, and bioethanol from starch, which are known as first generation biofuels.
First-generation biofuels have the advantage of reducing the entire greenhouse gas emissions and zero carbon production in some instances since the carbon emitted during burning of biofuels is compensated by the carbon absorbed by the plants during growth.
Second-generation biofuels, on another hand, are technologies which can be still in development. This new technology is targeted on producing second-generation biofuels by microbial fermentation of non-food crops.
Other sources include woody biomass from forestry, paper pulp, sawdust, bagasse, straw, stover, household food and garden waste. Know more about Carbon Offset Consultants.
The carbon footprint and overall energy yield will undoubtedly be drastically improved in comparison with first generation biofuels as there's no dependence on cultivating or harvesting the crops.
Biofuel Production
Bioethanol is conventionally produced through the enzymatic conversion of starchy biomass into sugars or fermenting 6-carbon sugars. Ethanol can also be produced from feedstocks like cassava, sorghum, potatoes, sugar beets, sugar cane, corn (maize) and cereal crops.
Researchers are actually concentrating on using ligno-cellulosic materials for advanced bioethanol production. Including pre-treating biomass release a hemicellulose and cellulose, hydrolysis release a fermentable 5- and 6-carbon sugars, separation of non-hydrolysed cellulose and solid residues accompanied by distillation.
Biodiesel is created by trans-esterification of fats and vegetable oils via the addition of methanol and a catalyst, yielding glycerol as a by-product.
Other feedstocks include palm oil seeds, soy seeds, sunflower seeds and rapeseeds. Advanced methods include replacing methanol of fossil fuels with bioethanol, which yields fatty acid ethyl ester as opposed to fatty acid methyl ether.
Recent advancements in the production methods include hydrogenation of fats and oils for producing biodiesel that can blend with fossil diesel around 50% without modifying engine efficiency.
What are co-benefits?
Co-benefits are positive outcomes from a carbon offset project, beyond the specific greenhouse gas emissions reductions. Co-benefits may be social, economic, or environmental. Samples of co-benefits include jobs created, health advantages, pollution mitigation (other than carbon), supporting gender equality, renewable energy generation, biodiversity, and education. Co-benefits are the deciding aspect in carbon offset purchases. Many carbon offset developers list the project co-benefits with regards to how they contribute to the UN Sustainable Development Goals.