Searching result

Totally found 36 items. Search in result

  • [资讯] India Makes Breakthrough In Biofuel Development
    摘要:The key to the scientists’ discovery is a new version of a zeolite catalyst – HPW/Meso-HZ-5 - which can be used to make the process of converting industrial biomass into an organic biofuel compound called furfural far more efficient. The current standard process of making furfural starts with biomass sourced from agricultural waste such as bagasse, cotton seed hulls, sawdust, oat hulls, rice hulls, wheat husk and bran, among others. After making the furfural, the current conventional first step toward making it into a viable biofuel is to chemically change it into furfuryl alcohol, which is then further processed to create alkyl levulinates. This process however, is a lengthy and complicated one with many steps. This is where the NCL team’s catalyst comes into play by considerably speeding up the process of conversion. The zeolite catalyst has shown good results in tests with 100 percent furfuryl alcohol conversion along with 97 percent ethyl levulinate biodiesel yield (a type of alkyl levulinate) and 3 percent ethoxy methyl (a food additive) furan yield. Importantly, the new HPW/Meso-HZ-5 catalyst produced better results than its parent catalysts H-ZSM-5 and Meso-HZ-5 when used separately. As explained by the research team, “due to higher number of active sites and larger pore size the travel distance is reduced, thereby improving accessibility of active sites. Low molar ratio of reactants would do away with the separation cost associated with unreacted ethanol, operational cost and reactor size, making the process economically viable and industrially safe.”
  • [资讯] 造纸生物固废的新兴生物炼制法
    摘要:制浆造纸厂在废水处理过程中会产生大量的污泥,将这些废弃物中的能量回收后,需要对残余的材料进行处理,这一直都是制浆造纸行业重大的经济负担和生态责任。 最近,科研院所和绿色化学公司一直在努力探索利用生物炼制方法来疏导进入垃圾填埋场的大量造纸污泥,与此同时,他们也致力于从富含可利用成分的废弃生物质中研发出新颖的高附加值的消费品。本文充分讨论了目前利用不同污泥生产各种生物材料及其衍生产品的科研工作和商业应用。其中小部分杰出产品就是薄膜热成型的热塑性餐具、可完全生物降解园艺用品,生物燃料和无甲醛木材粘合剂。
  • [资讯] Plastic ban could lead to ‘increase in energy demand’, BP report suggests.
    摘要:In response to these comments, a bp spokesman told bio-based world news: through our energy outlook we are not advocating any course of action, but looking to understand the impact on global energy systems of various scenarios. One of the scenarios we looked at this year considered the potential impact if a complete ban on single use plastics were to be introduced by 2040. we found that this could be expected to reduce global oil demand by up to 6 million barrels a day (out of c 105mmbpd) compared with the scenario without such a ban. We also said that this didnt take into account the impact of alternative materials that would be needed to replace single use plastics, in packaging and other uses.
  • [资讯] 生物质能源成两会热点! 多位人大代表发声力挺!
    摘要:今年两会上生物质能源成热点,多位人大代表发声力挺:大力推进生物质能源化项目!! 全国政协委员张建龙建议大力发展农林生物质能源,维护国家能源安全 两会期间,全国政协委员、国家林业和草原局局长张建龙向大会提交提案,建议大力发展农林生物质能源,维护国家能源安全。
  • [资讯] EC sets criteria for bioenergy ILUC risk evaluation
    摘要:March 14 (Renewables Now) - The European Commission (EC) yesterday announced the criteria for determining which bioenergy feedstocks carry high and low indirect land-use change (ILUC) risks. The European Parliament and the Council of Ministers now have two months, or up to four if they request more time to study the Delegated Act, to express an objection. If no objection is received, the text will be published in the Official Journal of the European Union.
  • [资讯] Thermochemistry and Kinetics of the Thermal Degradation of 2-Methoxyethanol as Possible Biofuel Additives
    摘要:Oxygenated organic compounds derived from biomass (biofuel) are a promising alternative renewable energy resource. Alcohols are widely used as biofuels, but studies on bifunctional alcohols are still limited. This work investigates the unimolecular thermal degradation of 2-methoxyethanol (2ME) using DFT/BMK and ab initio (CBS-QB3 and G3) methods. Enthalpies of the formation of 2ME and its decomposition species have been calculated. Conventional transition state theory has been used to estimate the rate constant of the pyrolysis of 2ME over a temperature range of 298–2000 K. Production of methoxyethene via 1,3-H atom transfer represents the most kinetically favored path in the course of 2ME pyrolysis at room temperature and requires less energy than the weakest Cα − Cβ simple bond fission. Thermodynamically, the most preferred channel is methane and glycoladhyde formation. A ninefold frequency factor gives a superiority of the Cα − Cβ bond breaking over the Cγ − Oβ bond fission despite comparable activation energies of these two processes.
  • [资讯] Sustainable intensification of high-diversity biomass production for optimal biofuel benefits
    摘要:The potential benefits of biofuels depend on the environmental impacts of biomass production. High-diversity mixtures of grassland species grown on abandoned agricultural lands have been proposed as enhancing climate mitigation potential, but can have low yields. Intensification might increase productivity, but might also cause negative environmental impacts. Here, we show that, compared with more intensive treatments, moderate intensification of high-diversity grasslands had as great or greater biomass yields, soil carbon stores and root mass, and had negligible effects on grassland stability, diversity and nitrate leaching. In particular, compared with untreated plots, the moderate treatment of irrigation and addition of 70 kgN ha−1 yr−1 resulted in 89% more yield, 61% more root carbon, 187% more soil carbon storage and, if biomass were used for bioenergy, twice the greenhouse gas reductions. Irrigation and 140 kgN ha−1 yr−1 had 32% lower greenhouse gas benefits, 10 times greater nitrate leaching and 121% greater loss of plant diversity than the moderate treatment. These results suggest that optimizing multiple environmental benefits requires sustainable intensification practices appropriate for the soils, climate and plant species of a region.
  • [资讯] EIA to update data reporting for biofuels
    摘要:The U.S. Energy Information Administration is seeking a threeyear extension with changes to its Petroleum Supply Reporting System. The proposed changes include those related to biofuels reporting.The PSRS consists of six weekly surveys that make up the Weekly Petroleum Supply Reporting System, eight monthly surveys and one annual survey. According to the EIA, the weekly petroleum and biofuels supply surveys collect data on petroleum refinery operations, blending, biofuels production, inventory levels, imports of crude oil, petroleum production, and biofuels from samples of operating companies. The monthly and annual petroleum and biofuels supply surveys collect data on petroleum refinery operations, blending, biofuels production, natural gas plant liquids production, inventory levels, imports, interregional movements, and storage capacity for crude oil, petroleum products and biofuels.One of the agency’s proposed changes would be made to Form EIA819. The EIA said it discontinued Form EIA22M and combined the data elements collected on that form with EIA819 to create a single survey instrument under Form EIA819 to cover all biofuels (including renewable fuels not currently tracked on any EIA survey), fuel oxygenates (ETBE, MTBE), and nonrefinery producers of isooctane. The EIA said the new Form EIA819 collects consistent volumetric balance data on petroleum and biofuel blending at biofuel production plants and feedstock inputs for all biofuels. Under the proposed changes, the form will also expand the scope of EIA biofuel data collection to include producers of renewable diesel fuel and other renewable fuels that are currently not collected. The agency said all facilities will report production capacity as well as receipts, production, input, shipments, beginning and ending stocks, as well as stocks in transit to the facility at the end of the report month. Part 9 of the form collects consumption on feedstock for production of biofuel and renewable fuels and annual fuels consumed at the facility. According to the EIA, form EIA819 also improves accuracy and consistency of biofuel and oxygenate production and blending, including blending with petroleum fuels.For Forms EIA810, EIA812, EIA814, EIA815 and EIA817, the agency is proposing to replace the current biofuel reporting categories of biomassbased diesel fuel, other renewable diesel fuel, and other renewable fuels with the new categories of biodiesel, renewable diesel fuel, and other renewable fuels and intermediate products. The EIA said the changes will clarify the products and improve utility of U.S. and regional data.
  • [资讯] Newly discovered cold-tolerant plants from Siberia could promote clean bioenergy
    摘要:That is where Miscanthus x giganteus comes in. This species, also known as elephant grass, is incredibly productive – 59 percent more productive than corn in the midwestern U.S. It grows well on marginal soils with minimal fertilization. M. x giganteus is a perennial, meaning it stores nutrients in underground stems called rhizomes and uses them to regrow from one year to the next. These rhizomes, along with the plant’s roots, store atmospheric carbon dioxide underground and keep soil in place, preventing carbon dioxide loss from erosion. M. x giganteus may be able to sustain significant bioenergy production to replace fossil fuels, while being grown on marginal lands that do not compete with food crops.
  • [资讯] 云南省生物质能源发展现状与前景分析
    摘要:近年来,可再生能源使用日渐广泛,非化石能源的开发和使用占比也逐渐提高。生物质能源作为非化石能源的重要组成部分其作用不可估量,如何合理开发利用这种清洁环保能源是我们面临的主要问题。本文从立足云南,结合云南的基本省情,对生物质能源在云南的利用现状和应用前景进行浅析。

意见反馈
返回顶部