نتایج جستجو برای: zeolitic additives light olefins reduction of pollutant

تعداد نتایج: 21225281  

Journal: :Catalysis Science & Technology 2017

Journal: :Sustainability 2023

This study examined enteric and excreta emissions from cattle pigs with a focus on effects of changed feeding practices. We assessed the impact revision Austrian Greenhouse Gas Air Pollutant Inventory (national method, NM), i.e., implementation Tier2-method IPCC-2019 guidelines, to more dynamic integration past present Cattle—in particular, dairy cows—had highest contribution CH4 nitrogen (Nex)...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Zhi-Yong Yang Vivian R Moure Dennis R Dean Lance C Seefeldt

A doubly substituted form of the nitrogenase MoFe protein (α-70(Val)(→Ala), α-195(His→Gln)) has the capacity to catalyze the reduction of carbon dioxide (CO(2)) to yield methane (CH(4)). Under optimized conditions, 1 nmol of the substituted MoFe protein catalyzes the formation of 21 nmol of CH(4) within 20 min. The catalytic rate depends on the partial pressure of CO(2) (or concentration of HCO...

Exhaust Gas Recirculation (EGR) concept is the most simple and Abstract more economical method for NO pollutant reduction in spark ignition engines. However, when the higher amount of the EGR gas enters into the engine, the power, torque and fuel economy of the engine decrease. One effective solution for reduction of undesirable effect of this method is to use cooled EGR, that results in more r...

2002
Y Hasegawa H Uchida S Asada T Katsube T Oyabu

ABSTRACT It is known that various plants have purification ability for indoor air pollutants. In this paper the purification mechanism of foliage plant was investigated by analyzing bioelectrical potential. It was first shown that the air purification ability of a plant depends on various environmental conditions, especially on light irradiation. It was then clarified that the bioelectrical pot...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده اقتصاد و علوم اجتماعی 1389

چکیده: پژوهش حاضر به بررسی تطبیقی اعتماد اجتماعی در بین دبیران زن و مرد مقطع راهنمایی شهر ایلام می پردازد. امروزه در جوامع شاهد گسترش ارتباطات هستیم و با توجه به این که دامنه کنش های اجتماعی از حد روابط با آشنایان و دوستان فراتر رفته و به تعامل با کنشگران غربیه و نا آشنا گسترش یافته است، لزوم وجود اعتماد، بیش از پیش احساس می شود. اما با توجه به نقش دبیران در نهادهای آموزشی، در انتقال ارزش ها و...

Journal: :Advanced Synthesis & Catalysis 2023

The inside cover picture illustrates the introduction of a catalyst-free three-component coupling reaction for synthesis 1,4-dicarbonyl compounds. This innovative process employs light-activated electron donor-acceptor complexes to initiate single-electron reduction via carboxylic acid derivatives, triphenylphosphine, and sodium iodide. Subsequently, decarboxylation fragmentation gives rise nuc...

Journal: :journal of sciences, islamic republic of iran 2014
m. masteri-farahani

in this work, we report a new well dispersed molybdenum complex attached through the mediation of aminopropylsilyl groups on the surface of multi-walled carbon nanotubes (mwcnts). the prepared hybrid nanomaterial was characterized with different physicochemical methods such as fourier transform infrared and atomic absorption spectroscopies, transmission electron microscopy, energy-dispersive x-...

2014
Graham E. Dobereiner Gulin Erdogan Casey R. Larsen Douglas B. Grotjahn Richard R. Schrock

A tandem catalytic reaction has been developed as part of a process to discover tungsten-based olefin metathesis catalysts that have a strong preference for terminal olefins over cis or trans internal isomers in olefin metathesis. This tandem isomerization/terminal olefin metathesis reaction (ISOMET) converts Cn trans internal olefins into C2n−2 cis olefins and ethylene. This reaction is made p...

2018
Yingxian Zhong Yuehua Liu Shuang Wu Yi Zhu Hongbin Chen Xiang Yu Yuanming Zhang

HIGHLIGHTS A facial method was used to fabricate BiOI/BiOCl film at room temperature.30% BiOI/BiOCl showed an excellent photocatalytic activity and stability.Improvement of photocatalytic activity was owed to expanded visible light absorption and high separation efficiency of charge. Photocatalysis has been considered to be one of the most promising ways to photodegrade organic pollutants. Here...

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