云南省新型墙体材料发展迅猛

云南省努力克服金融危机给新型墙体材料革新工作带来的困难和不利影响，坚持以科学发展观总揽全局，始终以“禁实推新”工作为重点，加快非粘土新墙材发展和应用，“禁实”工作全面推进，社会资本投资新型墙材项目势头强劲，一批上规模、上档次、符合国家产业政策的项目相继建成投产，全省新型墙材产能迅速扩大，墙材革新工作呈现出健康、快速发展的良好态势。2008年，全省投资新建、改扩建新型墙材生产线项目约5亿元，有一定规模的新墙材生产企业达589户，新墙材产量达47．82亿块标砖，同比增长21．16％，     

循环经济在上海大屯能源股份有限公司的实践

介绍上海大屯能源股份有限公司的基本情况、主要企业、主要污染物的排放现状及其对循环经济的实践;指出走循环经济发展之路,企业才更有竞争力。     

节能、环保墙体材料的应用与研究

文章阐述了目前新型轻质墙体材料是一种利废、环保、节能产品 ,阐述了墙体材料的选择和轻质墙体的经济分析 ,以及在设计和施工中的技术措施。新型墙体材料的应用 ,利国利民。     

基于循环经济的资源城市产业结构优化研究

资源城市曾为国家经济社会发展做出了突出贡献,但目前却成为区域发展中各方面矛盾集中凸显的问题地区.加快经济转型、优化产业结构是促使资源型城市尽早摆脱困境的关键.从资源城市的产业结构特征出发,论述了循环经济理论对资源城市的产业结构优化的意义,提出了基于循环经济模式的资源城市产业结构优化的建议.     

循环经济与福建省土地资源的可持续利用

在论述我省土地资源循环利用必要性的基础上,紧密结合循环经济的要求,具体探讨了循环经济“减量化、再利用、再循环”3原则在土地资源与可持续利用中的应用,最后从政策的角度,提出了推动我省土地资源循环利用的政策建议。     

循环经济在南通的探索与实践

通过多年的探索与实践,南通市在循环经济发展方面取得了令人鼓舞的成绩。文中从南通市发展循环经济的现状、实践成果、未来目标和任务、问题探讨等几个方面对全市循环经济发展进行了详细的阐述,提出了循环经济发展的一些思路和方法。     

用循环经济理念推进光盘生产的资源化进程

介绍光盘生产企业制造流程,废弃物来源及特性,废弃物的价值和处理方式,光盘资源化的处理技术,如何在光储存媒体产业推行循环经济和清洁生产。     

基于循环经济的资源型城市可持续发展问题的研究

叙述了发展循环经济以实现中国资源型城市产业转型的必要性,提出了发展循环经济的对策建议。     

石横特钢发展循环经济的模式与实践

某钢铁企业以技术创新、管理创新为依托,实现能源高效利用,代谢物高效再生利用。建设资源节约型钢铁企业循环经济模式主要的措施有:综合利用富余高炉煤气实现热电联产;余热余能高效回收发电;烧结矿余热回收发电,高炉余压发电;电机高频改造;废渣、尘、泥再利用。     

日本水暖卫浴行业发展循环经济的实践与经验

水暖卫浴行业大力发展循环经济,有利于提高能源、资源综合利用率,减少环境污染,推动行业的可持续发展。以日本水暖卫浴行业及其著名水暖卫浴公司TOTO(东陶)为主要研究对象,探究其在循环经济发展道路上的实践与经验,为我国水暖卫浴行业发展循环经济提供有益的经验借鉴。     

A new process based on a combination of gravity and flotation for the recovery of clean coal from flotation tailings

Beneficiation of clean coal from flotation tailings with a high intergrown ash content is gaining popularity in China. It not only improves the utilization rate of coal resources but also reduces environmental pollution. In this paper, a novel gravity–flotation process is proposed to concentrate low-ash fine coal and includes the disposal of tailings via gravity, grinding liberation, and froth flotation. The experimental results show that the clean coal had an ash content of 12.33% and the yield from the flotation tailings was 32.24% with an ash content of 46.39%, which has economic value in the current market.     

Fuel economy of new passenger cars in Mexico: Trends from 1988 to 2008 and prospects

This paper analyzes trends in fuel economy (kilometers per liter) of new passenger vehicles in Mexico over a period of 20 years from 1988 to 2008. Results show that in this period, fuel economy of the new passenger vehicle fleet, including multipurpose vehicles (a category similar to sport utility vehicles, SUVs), increased by only 6.3%. A simple Laspeyres index analysis was developed to evaluate both the impact of changes in vehicle sales structure by category and the changes in fuel economy. Results show that increased sales of heavier, multipurpose vehicles in place of subcompact and compact vehicles, impacted negatively on the fleet average fuel economy. If the structure of sales had continued in the same proportions across all categories as in 1988, fuel economy would have increased by 11.0%, instead of the actual 6.3%. This result coincides with trends in other countries. The paper also presents different scenarios of passenger car fuel economy for the year 2020, and its implications for gasoline consumption and CO₂ emissions. The results may influence the new passenger vehicle fuel economy standard that is currently under discussion in Mexico.     

A new process for the production of medium quality fuels from coal washing plant coarse tailings

Turkey’s proven bituminous coal reserve is very low, and it is about 1.3 billion tons. The annual bituminous coal production is 2 million tons, and the annual import amount is 30 million tons. Turkey is a foreign-dependent country in its bituminous coal requirement. In this respect, the highest recycling of coarse and fine plant tailings is important in respect of the efficient use of limited natural resources. In this study, a novel process was developed for medium quality fuel production from coarse plant tailings. By the developed process, from coarse plant tailings with an ash content of 78.21%, medium quality fuel was produced which has ash content between 29.20 and 44.38% and which has economic value in the current market. The upper calorific values of these fuels change between 5620 and 4350 kcal/kg. The developed process basically includes the stages of micronized grinding and then froth flotation applied to the obtained powder tailing material.     

燃煤联合循环发电技术的发展

综合介绍以煤为主要燃料的高效无污染联合循环发电技术的产生、发展及应用现状,并提出我国应用的可能及必要。     

Transition to hydrogen economy in the United States: A 2006 status report

Energy crises in the latter part of the 20th century, as well as the current increase in the cost of oil, emphasize the need for alternate sources of energy in the United States. Concerns about climate change dictate that the source be clean and not contribute to global warming. Hydrogen has been identified as such a source for many years and the transition to a hydrogen economy was predicted to occur from the mid-1970s to 2000. This paper reports on the status of this transition in the year 2006. Instead of being a clean source of energy, most of the hydrogen produced in the US results from steam reforming of fossil fuels, releasing _CO2${\mathrm{CO}}_2$ and other pollutants to the atmosphere. Nuclear process heat is ideally suited for the production of hydrogen, either using electricity for electrolysis of water, or heat for thermochemical hydrogen production or reforming of fossil fuels. However, no new nuclear plants have been ordered or built in the United States since 1979, and it may be many years before high-temperature nuclear reactors are available for production of hydrogen. Considerable research and development efforts are focused on commercializing hydrogen-powered vehicles to lessen the dependence of the transportation sector on imported oil. However, the use of hydrogen fuel cell vehicles (FCV) in 2006 is two orders-of-magnitude less than what has been predicted. Although it makes little sense environmentally or economically, hydrogen is also used as fuel in internal combustion engines. Development of hydrogen economy will require a strong intervention by external forces.     

新型太阳能集热墙冬季保温性能分析

建立新型结构的太阳能集热墙,给出新型太阳能集热墙的结构组成.利用CFD技术对新型太阳能集热墙系统采暖房间的温度场进行了模拟,给出室内温度场的分布规律,并分析了室内温度日变化情况;通过对比分析新型太阳能集热墙与传统太阳能集热墙的温度场分布,验证了新型太阳能集热墙具有良好的保温节能性能.     

How to improve the economy of bioethanol production in Serbia

Bioethanol accounts for the majority of biofuel use worldwide, either as a fuel or a gasoline enhancer. In Serbia, the industrial production of bioethanol still relies on conventional feedstocks containing starch and sugar such as corn, wheat and molasses. In order to improve the economy of bioethanol production and to avoid the competition of the feedstock utilization for food and energy, several production approaches based on crop selection, process integration and waste utilization were considered in this paper. Particular attention was put on utilization of non conventional crops such as triticale and damaged crops not appropriate for food consumption. Potential of lignocellulosic biomass for the production of second generation ethanol in Serbia was also considered as well as the utilization of stillage as a main by-product. The investigated approaches can significantly improve the economy of bioethanol production and contribute to solve serious environmental problems.     

Stakeholder perceptions towards the transition to a hydrogen economy in Poland

Poland has significant reserves of energy in the form of coal. However, the exploitation of these reserves could lead to significant carbon emissions. Hydrogen technologies present a potentially sustainable option for the Polish energy system. This paper reviews the existing Polish energy system, resources, policies and measures from the perspective of planning a transition to a hydrogen-based economy. The key challenges and opportunities gathered by systematic consultation of senior stakeholders are presented. Coke oven gas and coal gasification are the major short and medium term sources of hydrogen. Underground conversion of coal deposits with integrated carbon capture and storage (CCS) is most important in the long term. Other opportunities include development of renewables, by-product hydrogen and nuclear power. Current lack of infrastructure, particularly for CCS, hydrogen pipelines and clean coal is seen as a significant barrier. Regional and central government should cooperate with industry to develop a portfolio of demonstration projects to provide experience and stimulate demand for hydrogen.     

Synthesis by Spark Plasma Sintering: A new way to obtain electrode materials for lithium ion batteries

In the search of high-performance materials for lithium ion batteries, Li₂CoPO₄F offers many advantages like high theoretical capacity and high operating potential. The synthesis of Li₂CoPO₄F has been reinvestigated considering a conventional solid state reaction and an unconventional way. Due to the long heat-treatments required by the conventional approach, a beginning of grains coalescence is observed. Limiting particles growth has been allowed by a shorter reaction done by SPS (Spark Plasma Sintering). By this method, the synthesis of Li₂CoPO₄F was greatly shortened (from 10 h to 9 min), which favours the getting of submicrometric particles. The comparison of the electrochemical properties of the Li₂CoPO₄F obtained by the different ways confirms the advantages of SPS synthesis in performance enhancement.     

A new approach to improve the high-voltage cyclic performance of Li-rich layered cathode material by electrochemical pre-treatment

Lithium-rich nickel–manganese–cobalt oxide, Li[Ni_0.17Li_0.2Co_0.07Mn_0.56]O₂, was prepared by a co-precipitation method, and its cyclic behavior at a high potential was investigated. The as-prepared material shows a rapid capacity fading in its initial several cycles when it was operated above 4.5 V, which could be significantly improved through a pre-cycling treatment. Its reversible capacity in the range of 4.8–2 V could be increased from 200 to 250 mAh g⁻¹ after 50 cycle through a stepped pre-cycling treatment.