How much does it cost to make use of biofuel?
Carbon offsets could be generated by any kind 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 kinds of projects that will generate carbon offsets however. To acquire a feel for what project types exist, go to the methodologies page for the standards mentioned above.
The most frequent forms of biofuels are biodiesel, from oil-rich plants, and bioethanol from starch, which are called first generation biofuels.
First-generation biofuels have the advantage of reducing the overall greenhouse gas emissions and zero carbon production in some instances while the carbon emitted during burning of biofuels is compensated by the carbon absorbed by the plants during growth.
Second-generation biofuels, on one other hand, are technologies which are still in development. This new technology centers 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 soon be drastically improved when comparing to first generation biofuels as there's no significance of 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 may also be produced from feedstocks like cassava, sorghum, potatoes, sugar beets, sugar cane, corn (maize) and cereal crops.
Researchers are now focusing on using ligno-cellulosic materials for advanced bioethanol production. This includes pre-treating biomass to release hemicellulose and cellulose, hydrolysis to release fermentable 5- and 6-carbon sugars, separation of non-hydrolysed cellulose and solid residues followed by distillation.
Biodiesel is made 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 rather than fatty acid methyl ether.
Recent advancements in the production methods include hydrogenation of fats and oils for producing biodiesel that could blend with fossil diesel up to 50% without modifying engine efficiency.
What are co-benefits?
Co-benefits are positive outcomes from a carbon offset project, beyond the particular greenhouse gas emissions reductions. Co-benefits may be social, economic, or environmental. Types 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 element in carbon offset purchases. Many carbon offset developers list the project co-benefits with regards to how they donate to the UN Sustainable Development Goals.