柴油车尾气净化催化技术进展

介绍了柴油车尾气排放的特性及主要污染物;从颗粒物的催化再生技术、贫燃条件下NOx的选择性催化还原技术以及氧化催化技术等几个方面对柴油车尾气净化技术;尤其是催化技术进行了探讨;并提出了未来柴油车用催化剂的发展方向。     

贫燃条件下净化汽车尾气中NOx的还原催化剂研究现状

本文对贫燃条件下NOx的催化净化进行了综述与探讨,着重评述各种催化剂的优缺点及国内外相关领域的科研开发与进展,提出开发贫燃条件下汽车尾气净化催化剂尚需解决的问题和今后的研究方向,并指出了以后可能应用于实际的催化剂.     

贫燃NO_X选择性催化还原技术及其研究进展

简单介绍了脱除ＮＯＸ的催化技术和最新的贫燃ＮＯＸ选择性催化还原技术。着重分析国外在开发贫燃ＮＯＸ选择性催化还原技术过程中所进行的研究工作和目前存在的问题，并指出今后的研究方向     

贫燃条件下汽车尾气净化新型催化剂--耐湿热双功能催化剂

由于汽车尾气对环境和人类的危害 ,开发和研制高效、高活性、高寿命、高抗毒性的尾气净化催化剂以净化大气是目前迫切需要解决的问题。本文综述了目前国际上由低碳烃催化还原催化剂的研究现状 ,分析了各种催化剂各自的优势和存在的问题 ,着重论述分析了双功能催化剂特性 ,并提出以湿热稳定性好的磷酸硅铝分子筛为载体研制贫燃条件下汽车尾气净化耐湿热双功能催化剂的新设想。     

面向21世纪的汽车催化剂

根据机动车尾气排放标准现状 ,着重从满足低排放、超低排放尾气 ,贫燃发动机尾气 ,柴油机尾气及一些替代燃料尾气净化催化剂等几方面 ,展望了面向 2 1世纪机动车尾气净化催化剂体系的发展前景     

我国催化净化技术的研究进展及发展方向

催化净化是利用催化技术对工艺物流、产品和尾气等进行杂质脱除或产品纯化的过程,是催化科学的重要分支。传统的催化净化技术经过近40年的发展,已臻于成熟,多数技术的研究和技术创新活跃度有所降低,相关产品也进入生命周期的末期,市场竞争激烈,利润下降。催化净化技术更有前景的研究和应用在环境保护领域,尤其是精细化需求的环保领域。催化净化技术未来的发展方向:适应新的更严格排放标准的燃油超深度和低成本精制技术;满足精细化需求的环保技术(如室内空气净化和实验室尾气净化等);同一技术解决不同问题(如用高级氧化技术对烟气同时脱硫和脱硝)或多种技术集成解决同一问题(如催化氧化与相转移技术结合进行柴油精制)。     

稀燃汽车尾气NO_x催化净化技术

稀燃汽车尾气中NOx如何高效消除是环境催化领域亟需解决的问题。从稀燃汽车面临的挑战出发,重点概述了稀燃汽车尾气NOx的催化净化技术,包括催化分解、选择性催化还原、NOx存储还原,并讨论了该领域存在的问题以及研究方向。     

汽车尾气催化技术发展现状

综述了世界汽车尾气催化技术现状，指出钙状矿型催化剂、贫况氮氧化物（NOX）催化剂、柴油机尾气催化剂是目前人们的研究热点，特别是柴油机汽车尾气催化剂由于柴油发动机的燃油经济性、可靠性、耐久性正孕育着一个巨大的潜在市场。并对未来汽车尾气催化技术进行了展望。     

汽车尾气催化剂的研究进展

催化净化是控制汽车尾气污染的主要手段之一，是目前一种通用的尾气控制手段。本文综述了国内外汽车排气净化的主要工作，包括尾气催化剂的发展概况、催化剂载体、活性组分（贵金属和非贵金属）、助剂及催化机理的研究进展。     

汽车尾气污染及净化研究的进展

机动车尾气污染已经成为中国大气污染的主要来源之一。净化机动车尾气主要包括：1、尾气催化净化：2、复合燃油添加剂的研究；3、微乳化燃油的研究；4、物理方法净化燃油。改变和提高燃油的综合性能，减少汽车尾气污染是当务之急。     

硝酸或己二酸行业氧化亚氮直接催化分解技术研究进展及现状

在硝酸或己二酸行业生产过程中,均不同程度排放N_2O污染物。N_2O直接催化分解技术是消除其污染的最有效方法之一。从实际应用角度,针对硝酸或己二酸行业,尤其当前随着国内碳减排市场的不断成熟,研究开发新型N_2O直接催化分解技术或产品非常必要。综述了硝酸或己二酸行业N_2O直接催化分解技术研究进展及减排市场现状。     

催化裂化装置再生烟气污染与防治

针对催化裂化装置再生烟气(包括一氧化碳、硫氧化物、氮氧化物和粉尘颗粒物等)排放对环境造成污染的问题,分析讨论了再生烟气产生的原因、排放超标的危害,介绍了脱除烟气污染物技术、助剂技术及其他最新技术进展,并提出了再生烟气污染物治理的有关建议。     

Application of the monoliths in DeNOx catalysis

Air pollution abatement catalysis refers to catalytic technologies and processes for reducing emissions of environmentally unacceptable compounds. Major problems related to these catalytic clean-up technologies are mobile emission control, removal of nitrogen oxides (NO_x), sulphur compounds, volatile organic compounds (VOCs) and other pollutants generated by industry or by other stationary sources. Application of the monolith catalysts and/or reactors is a key solution to these problems. This overview describes basic features of the monolithic structures and discusses their development and application prospects focusing on DeNO_x catalysis. The status and ongoing modeling of the monolithic reactors are outlined. Particular emphasis is put on experimental validation and practical applications of the mathematical models of a monolithic reactor.     

Bioprocesses for the removal of nitrogen oxides from polluted air

Nitrogen oxides (NOx) of environmental concern are nitrogen monoxide (NO) and nitrogen dioxide (NO₂). They are hazardous air pollutants that lead to the formation of acid rain and tropospheric ozone. Both pollutants are usually present simultaneously and are, therefore, called NOx. Another compound is N₂O which is found in the stratosphere where it plays a role in the greenhouse effect. Concern for environmental and health issues coupled with stringent NOx emission standards generates a need for the development of efficient low‐cost NOx abatement technologies. Under such circumstances, it becomes mandatory for each NOx‐emitting industry or facility to opt for proper NOx control measures. Several techniques are available to control NOx emissions: selective catalytic reduction (SCR), selective non‐catalytic reduction (SNCR), adsorption, scrubbing, and biological methods. Each process offers specific advantages and limitations. Since bioprocesses present many advantages over conventional technologies for flue gas cleaning, a lot of interest has recently been shown for these processes. This article reviews the major characteristics of conventional non‐biological technologies and recent advances in the biological removal of NOx from flue gases based on the catalytic activity of either eucaryotes or procaryotes, ie nitrification, denitrification, the use of microalgae, and a combined physicochemical and biological process (BioDeNOx). Relatively uncomplicated design and simple operation and maintenance requirements make biological removal a good option for the control of NOx emissions in stationary sources. Copyright © 2005 Society of Chemical Industry     

Catalytic solutions for fugitive methane emissions in the oil and gas sector

Global warming attributed in part to the release of the so-called greenhouse gases is becoming an increasing concern, and steps are being implemented to mitigate such emissions. The two most significant emissions are carbon dioxide and methane. A significant fraction of emissions is emitted by oil and gas production and transportation facilities. Because methane has at least 21 times the greenhouse gas potential of carbon dioxide, it is advantageous to convert methane to carbon dioxide via combustion, even if the carbon dioxide is vented to the atmosphere. Fugitive methane combustion does however present certain difficulties in its combustion. This paper presents an overview of the problem and suggests some possible catalytic reactor technologies appropriate for the solution.     

Environmental Fluid Catalytic Cracking Technology

The fluid catalytic cracking (FCC) process converts heavy oil into voluable fuel products and petrochemical feedstocks. Environmental regulations are a key driving force for reducing FCC process air-pollutant emissions and for changing the composition of fuel products. Environmental considerations are affecting the design and operation of the FCC and are providing opportunities for the development of in-process additives. The present article reviews developments in these environmental technologies.     

Environmental Fluid Catalytic Cracking Technology

The fluid catalytic cracking (FCC) process converts heavy oil into voluable fuel products and petrochemical feedstocks. Environmental regulations are a key driving force for reducing FCC process air-pollutant emissions and for changing the composition of fuel products. Environmental considerations are affecting the design and operation of the FCC and are providing opportunities for the development of in-process additives. The present article reviews developments in these environmental technologies.     

油烟污染及其排放控制技术

介绍了烹调油烟的组成、分析方法和主要危害,阐述了各类油烟净化技术的特点,分析了油烟净化的国内外研究动态,指出催化燃烧技术是油烟污染控制技术的发展趋势。     

燃煤烟气同时脱硫脱硝技术进展

煤炭仍是我国能源的主要原料,其燃烧排放的SO₂和NO_x依然是主要污染源之一。对近期燃煤烟气同时脱硫脱硝的液相吸收技术、紫外高级氧化技术、低温等离子体技术、电子束技术、臭氧前置氧化结合化学吸收技术和干法催化再生技术进行了详细的总结和评述,分析了对SO₂和NO_x脱除效率的影响因素,并对技术的应用进行了展望。