固体生物质燃料特性检验标准的研究

详细简要介绍了欧盟CET/TS、美国ASTM关于生物质燃料检测分析标准,并同我国生物质燃料分析检测标准进行比较,重点分析了三种检测分析标准的差异,并就主要检测分析标准内容进行了说明,为我国生物质燃料检测分析标准的完善作些有意义的工作。     

固体生物质燃料特性检验标准的研究

介绍了欧盟CEN/TS、美国ASTM关于生物质燃料检测分析标准,并同我国生物质燃料分析检测标准进行比较。重点分析了3种检测分析标准的差异,并就主要检测分析标准内容进行了说明,为我国生物质燃料检测分析标准的完善做些有意义的工作。     

中国生物质固体成型燃料标准体系的研究

我国生物质固体成型燃料技术已基本成熟,但尚未制定相关标准,这对该产业发展是不利的。通过对美国ASTM、欧盟CEN/TC固体生物质燃料标准及燃烧设备标准的分析,并结合我国生物质固体成型燃料产业发展的实际需求,从产业链的角度出发,提出了我国的生物质固体成型燃料标准体系。该体系分为基础标准、通用标准和专用标准3个层次,同时,按轻重缓急的原则提出相关建议。该标准体系的提出有利于规范我国生物质固体成型燃料市场,为产业发展创造良好的市场环境。     

固体生物质燃料燃烧颗粒物排放研究状况

介绍了固体生物质燃料和空气中颗粒污染物的特点,从形成机理、质量浓度、数量浓度、分布特点以及颗粒物成分方面阐述了国内外对颗粒物排放的研究;分析了国内外对固体生物质燃料的颗粒物排放存在的问题,根据我国固体生物质燃料的特点,提出了我国生物质固体成型燃料颗粒物排放的研究方向。     

生物质固体成型燃料环模成型技术研究进展

综合分析了国内外生物质固体成型燃料环模成型技术、成型设备及产业发展现状.比较了生物质环模颗粒成型机和生物质环模压块成型机的性能和产品,指出了生物质固体成型燃料环模技术及设备存在着基础理论薄弱、原料适应差、易损件寿命短等问题;提出了我国生物质固体成型燃料环模成型技术的发展方向.     

生物质固体成型燃料燃烧监测技术与设备研究

介绍了典型的生物质固体成型燃料自动燃烧器和成型燃料炉排式锅炉,分析了国家相关设备的热工性能检测指标、污染物排放监测指标及国内外成型燃料燃烧设备的监测系统的差距,指出我国目前存在的燃烧设备检测监测标准缺乏、不完善,监测设备独立、单一及未成系统等问题,提出提高燃烧效率,建立统一的评价标准等相关建议,以期为我国生物质固体成型燃料产业发展提供参考。     

加快制定我国生物质成型燃料的标准

生物质成型燃料是生物质能开发利用的一个重要途径。加快生物质成型燃料标准规范的制订是促进生物质成型燃料产业化发展的重要环节。借鉴欧洲国家的生物质成型燃料标准经验，从注重我国用户的使用需求、生产和运输的方便性以及燃料的清洁性出发，加快制定适合我国的生物质成型燃料标准。     

固体氧化剂提高生物质燃料燃烧性能的研究

运用热分析手段考察了一种固态氧化剂M对粉末状生物质燃料燃烧性能的改善作用,对米糠、木屑两种典型粉末状生物质以空气为氧化剂和以M为氧化剂的燃烧过程进行了对比考察。研究结果表明,M能增加米糠和木屑的放热量,其增加比例分别为1．6倍和2、1倍;添加M能使米糠和木屑的最大燃烧速度由0．37mg／mg．min和0．49mg/mg.min提高到0．63mg／mg．min和1．21mg／mg、min,对应温度由292℃和319℃降低至280℃和278℃。     

河北省生物质固体成型燃料产业发展研究

随着国家城乡一体化建设的推进,能源需求量将急剧增加。生物质固体成型燃料作为重要的可再生能源,可直接用于居民炊事采暖、区域供热和工农业生产。发展生物质固体成型燃料产业,有助于实现能源、环境和经济社会的综合效益。利用好河北省的资源、技术等优势,制定科学的政策措施,将加快河北省生物质固体成型燃料产业的规模化、市场化发展。     

水浸取-离子色谱法测定固体生物质燃料中氯含量的研究

介绍了测定固体生物质中水溶性氯含量的方法——水浸取-离子色谱法,试验了加料量、加热时间和加热温度对测定结果的影响。研究结果表明,水浸取可溶性氯的最佳条件是固体生物质燃料与水的比为1 g/50mL,在110~120℃下加热40 min。进行了方法重复性和加标回收率试验,对比了XRF法半定量直接分析的结果。试验结果表明,水浸取-离子色谱法操作简单、重复性好、准确度高,能满足固体生物质燃料中氯离子含量的测试要求。     

国内外生物航油研究现状

介绍了生物航油的特性、原料、生产方法及利用现状。用微藻生产生物航油是今后研究的主要方向,但微藻大规模培养、收集以及提取都存在问题,尚未工业化。植物油需要进行复杂的催化裂解处理,将高碳烷烃分解为低链烷烃;生物质可分解为合成气,然后以合成气为原料,利用费—托合成反应生产相当于煤油的航空代用燃料;热裂解利用生物质为原料,经快速热裂解生产液体产物,但整体产物中轻质烃的产率较低。     

Impact of EU biofuel policies on world agricultural production and land use

The European Union aims to increase the share of renewable energy in its total energy consumption to reduce greenhouse gas emissions and make the economy more CO₂ neutral. This policy is further motivated by a desire to reduce dependency on fossil fuel imports and to stimulate rural development and the agricultural sector.     

Renewable hydrogen energy regulations,codes and standards: Challenges faced by an EU candidate country

The European Union is one of the most important players in the field of world energy with an integrated and well-organized energy market. However, energy policies in the EU are not sustainable. The EU is the world’s largest importer of fossil fuels and is leading global action in accelerating the transition to renewable energy and low-carbon economy at present. Renewables make the second-largest contribution to domestic energy production after coal.     

Growing trade of bioenergy in the EU: Public acceptability, policy harmonization, European standards and certification needs

Since 2000, the consumption of bioenergy in the European Union has grown, along with a concurrent growth in the trade of biomass for energy purposes (though traded volumes still remain small). Bioenergy production and trade will likely continue to increase into the future, driven by climate change concerns, emissions reduction targets, increasing concerns about domestic energy security and favourable policies. The harmonization of European standards and the development of certification systems are key issues to resolving potential negative effects of increased biomass trade. Certification systems not only address the issue of environmental sustainability from production to end-use, but also allow for product differentiation while adding value to sustainably produced products, which can ultimately enhance a competitive and sustainable bioenergy market. In addition to analyzing bioenergy trade growth in the European Union, a questionnaire survey of 92 bioenergy experts from eight member states within the European Union was conducted. Survey results show that bioenergy is highly accepted in the European Union but that there is a lack of European standards and policy harmonization, along with the absence of a competitive market or a certification system, all of which are necessary for sustainable production and trade of bioenergy. A large majority (63 percent) of the total respondents agreed that the certification of bioenergy is necessary to promote the sustainable use of biomass.     

欧盟的可再生能源促进政策对我们的启示

在环境问题的严峻挑战下,欧盟将可再生能源发展确立为关键的能源战略之一。欧盟在坚持固定电价制的同时确立可再生能源发电总量目标,在推进电力市场化改革的基础上强化对可再生电力的支持,并通过建立有效的化石燃料财税制度为可再生能源发展提供更广阔的空间。     

2012年欧盟碳市场评述

欧盟碳排放贸易体系(EU ETS)自2005年至今已运行了8年。在体系不断成熟的同时,也面临着一系列问题。本文总结了EU ETS2012年度的运行情况,回顾了年度主要政策,对存在的主要问题和经验进行了分析与总结,并为我国推进碳排放交易工作提出相关建议。     

An integrated renewable energy park approach for algal biofuel production in United States

Algal biomass provides viable third generation feedstock for liquid transportation fuel that does not compete with food crops for cropland. However, fossil energy inputs and intensive water usage diminishes the positive aspects of algal energy production. An integrated renewable energy park (IREP) approach is proposed for aligning renewable energy industries in resource-specific regions in United States for synergistic electricity and liquid biofuel production from algal biomass with net zero carbon emissions. The benefits, challenges and policy needs of this approach are discussed.     

Assessment of basic properties and thermal analysis of hybrid biofuel blend

Among the alternative fuels, vegetable oil is seen as a potential source of energy due to its readily available variety of sources and its certain physical properties that are comparable to those of diesel fuels. However, higher contents of triglyceride in vegetable oil contribute to higher viscosity and density that is affecting the inferior engine performance and emissions. The key properties, such as viscosity, density, and calorific value (CV), have a significant effect on fuel atomization, fuel combustion, and exhaust emissions. In this study, refined palm oil (RPO) was blended with a newly introduced novel biofuel, Melaleuca cajuputi oil (MCO), in order to reduce the viscosity and density and enhance blend properties. This blend is analyzed and compared with RPO–diesel and RPO–ethanol blends in terms of viscosity, CV, and density. These hybrid binary biofuel (HBB) blends were prepared on the volumetric basis of 10%, 20%, 30%, and 50% of MCO, ethanol, and diesel with RPO. The basic fuel properties and the correlation of temperature–viscosity–blend ratio were analyzed. The results showed that the MCO has comparable key properties to those of diesel fuels. The viscosity and density of HBB decrease as the fraction of MCO/ethanol/diesel increases in the blend. The higher the fraction of MCO/diesel in the blend, the higher is the CV observed. Notably, the viscosity of neat RPO and its blends is strongly influenced by temperature variations. The combination of blend technique and preheating had a substantial effect in reducing the viscosity and density of the HBB. Remarkably, the blend of MCO–RPO has the potential to highly considered as a new source of biofuel.     

Use of bioelectrode containing DNA-wrapped single-walled carbon nanotubes for enzyme-based biofuel cell

Biofuel cells that utilize enzymes are attractive alternatives to metal catalyst-based cells because they are environmentally friendly, renewable and operate well at room temperature. Glucose oxidase (GOD)/laccase based biofuel cells have been evaluated to determine if they are useful power supplies that can be implanted in vivo. However, the usefulness of GOD/laccase systems is limited because they produce low level of electrical power. The effects of DNA-wrapped single-wall carbon nanotubes (SWNTs) on the electrical properties of a fuel cell are evaluated under ambient conditions in an attempt to increase the electrical power of an enzyme-based biofuel cell (EFC). The anode (GOD) and cathode (laccase) system in the EFC is composed of gold electrodes that are modified with DNA-wrapped SWNTs. Glucose (for anode) and O₂ (for cathode) are used as the substrates. The anodic electrical properties increase significantly with a bioelectrode that contains DNA-wrapped SWNTs as an electron-transfer mediator. Furthermore, the modified bioelectrode results in increased activities and stabilities of GOD and laccase, which enhance power production (442 μW cm⁻² at 0.46 V) compared with a basic EFC.