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选择催化还原(SCR)脱硝技术在中国燃煤锅炉上的应用(下)

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热力发电 2007年第9期36卷 10-15页

作者： hans jensen-holm Nan-Yu Topsφe 崔建华托普索公司托普索公司北京代表处北京100004

针对燃煤电厂采用高尘选择催化还原(SCR)脱硝装置时可能遇到的问题进行分析,并对设计SCR反应器和选择适合的催化剂方面提出了建议。在选择催化剂时,针对中国煤,要考虑催化剂活性位潜在积灰以及飞灰中高CaO含量所引起的催化剂的失活。以... 详细信息

针对燃煤电厂采用高尘选择催化还原(SCR)脱硝装置时可能遇到的问题进行分析,并对设计SCR反应器和选择适合的催化剂方面提出了建议。在选择催化剂时,针对中国煤,要考虑催化剂活性位潜在积灰以及飞灰中高CaO含量所引起的催化剂的失活。以台山电厂600MW机组和阳城电厂600MW机组及美国肯塔基州Elmer Smith电站150MW机组的SCR脱硝工程为例进行了说明。

关键词：燃煤锅炉烟气脱硝 SCR脱硝技术催化剂流场模拟计算流体力学实体模型

催化剂总体积及压降最小化的燃气轮机尾气多种污染物催化脱除应用

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催化剂总体积及压降最小化的燃气轮机尾气多种污染物催化脱除应用

2012火电厂污染物净化与节能技术研讨会

作者： Niklas Jakobsson hans jensen-holm 马楠托普索公司环境研发与环保催化剂部

＜正＞简介自二十世纪七十年代以来,选择性催化还原法（SCR）已被证明是从燃煤锅炉中脱除氮氧化物最有效的控制技术。许多年来,由于燃气轮机的排放较低,无需安装脱硝装置,同时燃气轮机制造商不断改进燃烧工艺,采用了雾水喷射技术,将氮... 详细信息

＜正＞简介自二十世纪七十年代以来,选择性催化还原法（SCR）已被证明是从燃煤锅炉中脱除氮氧化物最有效的控制技术。许多年来,由于燃气轮机的排放较低,无需安装脱硝装置,同时燃气轮机制造商不断改进燃烧工艺,采用了雾水喷射技术,将氮氧化物的排放降至极低水平。然而,美国的环境法规已经为许多欧洲国家和在之后的几年里很多亚洲国家如中国、韩国和泰国所仿效,也开始采用SCR技术。后

关键词：火电厂尾气脱硝催化剂燃气轮机

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降负荷选择性催化还原操作的限制

降负荷选择性催化还原操作的限制

Removing trace oxygen to obtain truly intrinsic transport in organic semiconductors

第十七届二氧化硫氮氧化物、汞污染防治技术暨细颗粒物（PM2.5）控制与监测技术研讨会

作者： Joakim Reimer Th?gersen hans jensen-holm 托普索公司

在采用高硫燃料的锅炉中,SCR脱硝工艺的最低操作温度取决于铵盐的露点。在降低锅炉负荷条件下,准确预测露点温度变得非常重要。通过对燃煤和燃油SCR装置的实验模拟,对先前确定的特定铵盐组成的露点相关性进行了确定。由于催化剂中的毛... 详细信息

在采用高硫燃料的锅炉中,SCR脱硝工艺的最低操作温度取决于铵盐的露点。在降低锅炉负荷条件下,准确预测露点温度变得非常重要。通过对燃煤和燃油SCR装置的实验模拟,对先前确定的特定铵盐组成的露点相关性进行了确定。由于催化剂中的毛细作用力,硫酸氢铵（ABS）在高于气相露点大约28℃时可见冷凝,热处理这种抑制是可逆的。一项新的发现是滞后效应,即达到一定抑制水平出现再生需要的温度要略高于达到抑制水平时的温度,在达到抑制水平时,温度高于ABS露点出现下降。托普索开发的ABS抑制预测模型很好的阐述了平衡抑制水平和ABS抑制的动态特性。已经在电厂运行,SCR工艺ABS露点附近的烟气数据,在降负荷条件下,优化SCR工艺性能是可行的。结合托普索设计工具,托普索DNX催化剂的多孔性确保了其避免ABS冷凝影响的最佳性能,可最大程度的在ABS露点附近进行SCR脱硝操作。

关键词： SCR低负荷运行 ABS抑制模型滞后效应工业经验

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Science China Materials 2024年第5期67卷 1668-1669页

作者： hans Kleemann Dresden Integrated Center for Applied Physics and Photonic Materials Technische UniversitätDresdenGermany

Organic semiconductor is an emerging generation semiconductor material,which has a broad application prospect in the field of flexible and large-area *** now,tens of thousands of organic semiconductor molecules with diverse functions have been developed through elaborate molecular *** molecules are often classified into n-type and ptype,depending on whether the prevalent charge carriers are electrons or holes[1].

关键词： transport intrinsic moving

Suppression of mature TAU isoforms prevents Alzheimer's disease-like amyloid-beta oligomer-induced spine loss in rodent neurons

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Neural Regeneration Research 2024年第8期19卷 1655-1657页

作者： Sarah Buchholz hans Zempel Institute of Human Genetics Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany

Introduction:TAU isoforms as disease mediators:The microtubule-associated protein TAU is predominantly present in the axons of neurons under physiological *** Alzheimer’s disease(AD)and related tauopathies,TAU also mislocalizes("TAU missorting")to the soma and the dendrites,where it eventually forms aggregates,the so-called neurofibrillary tangles(for review see Zimmer-Bensch and Zempel,2021;Zempel,2023).

关键词： Alzheimer Zimmer tau

Synthetic demand data generation for individual electricity consumers:Inpainting

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Energy and AI 2024年第1期15卷 36-43页

作者： Dascha Dobrovolskij hans-Georg Stark Universität Bremen Bibliothekstraβe 528359 BremenGermany Technische Hochschule Aschaffenburg Würzburger Straβe4563743 AschaffenburgGermany

In this contribution we deal with the problem of producing“reasonable”data,when considering recorded energy consumption data,which are at certain sections incomplete and/or *** task is important,when energy providers employ prediction models for expected energy consumption,which are based on past recorded consumption data,which then of course should be reliable and *** a related contribution Yilmaz(2022),GAN-based methods for producing such“artificial data”have been *** this contribution,we describe an alternative and complementary method based on signal inpainting,which has been successfully applied to audio processing Lieb and Stark(2018).After giving a short overview of the theory of proximity-based convex optimization,we describe and adapt an iterative inpainting scheme to our *** usefulness of this approach is demonstrated by analyzing real-world-data provided by a German energy supplier.

关键词： Time series Missing data points Time-frequency analysis Convex optimization Douglas-Rachford-algorithm Gabor transform

Sensory neurons: unveiling the symphony of wound healing

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Signal Transduction and Targeted Therapy 2024年第8期9卷 3158-3160页

作者： Dongsheng Jiang hans-Gunther Machens Yuval Rinkevich Precision Research Center for Refractory Diseases Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Trauma Medical Center Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Plastic and Hand Surgery Klinikum rechts der IsarSchool of MedicineTechnical University of MunichMunichGermany Institute of Regenerative Biology and Medicine Helmholtz Center MunichMunichGermany

In a recent paper published in Nature,Lu et *** a pivotal role of Nav1.8+nociceptor-released neuropeptide calcitonin generelated peptide(CGRP)in modulating the activities of myeloid cells during skin and muscle injury... 详细信息

关键词： healing wound al.

Amino acid and mineral digestibility,bone ash,and plasma inositol is increased by including microbial phytase in diets for growing pigs

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Journal of Animal Science and Biotechnology 2024年第2期15卷 699-712页

作者： Liz Vanessa Lagos Mike Richard Bedford hans Henrik Stein Division of Nutritional Sciences University of IllinoisUrbanaIL 61801USA AB Vista Marlborough SN84ANUK

Background The effect of microbial phytase on amino acid and energy digestibility is not consistent in pigs,which may be related to the phytase dosage or the adaptation length to the ***,an experiment was conducted to test the hypotheses that increasing dietary phytase after an 18-day adaptation period:1)increases nutrient and energy digestibility;2)increases plasma P,plasma inositol,and bone ash of young pigs;and 3)demonstrates that maximum phytate degradation requires more phytase than maximum P *** Data indicated that increasing inclusion of phytase[0,250,500,1,000,2,000,and 4,000 phytase units(FTU)/kg feed]in corn-soybean meal-based diets increased apparent ileal digestibility(AID)of Trp(quadratic;P<0.05),and of Lys and Thr(linear;P<0.05),and tended to increase AID of Met(linear;P<0.10).Increasing dietary phytase also increased AID and apparent total tract digestibility(ATTD)of Ca and P(quadratic;P<0.05)and increased ATTD of K and Na(linear;P<0.05),but phytase did not influence the ATTD of Mg or gross *** of plasma P and bone ash increased(quadratic;P<0.05),and plasma inositol also increased(linear;P<0.05)with increasing inclusion of *** concentrations of inositol phosphate(IP)6 and IP5(quadratic;P<0.05),reduced IP4 and IP3(linear;P<0.05),but increased inositol concentrations(linear;P<0.05)were observed in ileal digesta as dietary phytase *** ATTD of P was maximized if at least 1,200 FTU/kg were used,whereas more than 4,000 FTU/kg were needed to maximize inositol *** Increasing dietary levels of phytase after an 18-day adaptation period increased phytate and IP ester degradation and inositol release in the small ***,increasing dietary phytase resulted in improved digestibility of Ca,P,K,Na,and the first 4 limiting amino acids,and in increased concentrations of bone ash and plasma P and *** a corn-soybean meal diet,maximum inositol release requires appr

关键词： Bone ash Inositol Nutrient digestibility Phytase Phytate degradation Pigs

***:A Julia package for micromagnetic and atomistic simulations with GPU support

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Chinese Physics B 2024年第10期33卷 70-79页

作者： Weiwei Wang Boyao Lyu Lingyao Kong hans Fangohr Haifeng Du Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230031China School of Physics and Optoelectronic Engineering Anhui UniversityHefei 230601China University of Southampton Southampton SO171BJUnited Kingdom

*** is an open-source Julia package for micromagnetic and atomistic *** the features of the Julia programming language,*** supports CPU and various GPU platforms,including NVIDIA,AMD,Intel,and Apple ***,*** supports Monte Carlo simulations for atomistic models and implements the nudged-elastic-band method for energy barrier *** built-in support for double and single precision modes and a design allowing easy extensibility to add new features,*** provides a versatile toolset for researchers in micromagnetics and atomistic simulations.

关键词： micromagnetic simulations atomistic simulations graphics processing units