搜索结果: 1-15 共查到“矿山工程技术 CO”相关记录18条 . 查询时间(0.243 秒)
采空区CO涌出量预测模型
采空区 CO涌出量 预测模型 矿井通风
2018/4/16
为研究综放工作面CO涌出规律，以指导工作面通风及解决采空区自燃防治问题,以瑞安煤矿1煤层首采层014N1-1综放工作面为原型，采用COMSOL Multiphysics 50建立采空区CO涌出量模型，并开展正交试验设计及数值模拟计算。然后，采用SPSS软件对模拟结果进行逐步回归，建立了CO涌出量关于CO源项强度、CH4源项强度、CO反应速率、推进速度、风速等5个因素的回归模型，并采用现场...
为阐明煤在无氧环境下升温过程中CO的产生及变化规律，利用程序控制升温和时间分辨红外光谱分析方法，在无氧环境下对煤进行程序控制升温，采集并分析了煤无氧升温过程中CO产生及变化规律的时间分辨红外光谱谱图，揭示了煤无氧升温过程中CO的产生和变化规律，建立了描述CO生成量与煤质量分数之间函数关系的方程。结果表明：在30~370 ℃，由于热解温度不够高，无CO产生;在煤失重最快的370~650 ℃，CO生成...
A numerical simulation study of CO 2 injection for enhancing hydrocarbon recovery and sequestration in liquid-rich shales
CO2 EOR Tight formations Experimental design Response surface modeling Recovery of shale liquid CO2 sequestration
2018/4/2
Less than 10% of oil is usually recovered from liquid-rich shales and this leaves much room for improvement, while water injection into shale formation is virtually impossible because of the extremely...
密闭环境内循环催化氧化CO反应特性研究
密闭环境 CO 催化氧化 紧急避险
2013/12/9
为了研究高效可行的净化技术，有效控制密闭环境内CO的浓度，选取3种催化剂（PD-1，AU-1，HC-1）在密闭环境CO循环净化模拟装置上开展了CO循环净化实验研究。实验结果表明，3种催化剂均有催化氧化CO的作用，且均存在一个较优空速值，分别为：215 000， 215 000， 200 000 h -1，在该空速值条件下将浓度400×10 -6左右的CO催化氧化至24×10 -6附近所需反应时间最...
采用等温热重法对比神木煤焦在900～1 050 ℃分别与CO 2和水蒸气气化的反应活性。为研究气化残炭反应性，分别采用均相模型、缩核模型、混合模型和修正体积模型对煤焦气化后期反应速率与碳转化率的关系进行拟合。结果表明：混合模型和修正体积模型对实验数据有很好的拟合效果；均相模型和缩核模型的拟合效果随气化温度和反应气氛而变化；不同模型预测煤焦分别与CO 2和水蒸气反应后期的活化能范围分别为200.65...
矿井CO气体成因类型及机理辨识分析
原生CO气体 次生CO气体 CO气体成因类型 CO气体产生机理
2013/12/9
针对采煤作业空间CO气体异常，来源及成因类型不清等问题，综合运用矿井火灾学、煤田地质学、瓦斯地质学及煤化学等多学科理论，提出了CO气体成因类型由原生CO气体和次生CO气体构成。原生CO气体是煤化作用阶段的非烃类气体产物之一；次生CO气体是指煤机械破碎激活脱羰分解产生的CO气体，煤常温氧化和煤升温氧化过程产生的CO气体，也包括井下炸药爆破和防爆机车运行释放的CO气体。对原生CO气体和次生CO气体中煤...
针对高瓦斯采空区漏风流内含有瓦斯的实际情况，自制了含瓦斯风流条件下煤的低温氧化实验系统，按拟定的配气方案开展了低温氧化实验，分析了CO的生成规律。结果表明：随氧气体积分数的降低或甲烷体积分数的升高，CO生成的初始温度滞后，相同温度时CO的生成量减小。因此，用新鲜空气来预测高瓦斯采空区的煤自燃状态，易造成错判、误判。根据气固多相反应动力学原理，分析了化学反应速率变化的原因，从而合理解释了实验结果。
选用简化的含氮焦炭模型，在分子水平上对O2氧化含氮焦炭释放出CO和NO的异相反应机理进行研究。采用B3LYP/6-31G(d)密度泛函理论方法优化了反应路径上的反应物、产物、中间体和过渡态的几何构型，得到各结构的相对能量，进而得到整个反应的势能面。研究表明，O2氧化含氮焦炭的第1步为在焦炭表面的吸附，吸附反应释放出414.5 kJ/mol的热量。CO和NO从O2吸附产物中释放所需克服的最大能...
On the Mechanism of Selective CO Oxidation on Nanosized Au/g-Al2O3 Catalysts
Inverse Gas Chromatography Rate Constants Au catalysts
2009/7/28
New findings give further information on the
mechanism of carbon monoxide selective oxidation
over g-alumina supported nanoparticle sized gold
catalysts. a) CO2 formation, increasing with rising
t...
Application of Heterogeneous Gold Catalysis with Increased Durability: Oxidation of CO and Hydrocarbons at Low Temperature
Oxidation of CO Hydrocarbons
2009/7/28
2% Au/Al2O3 catalysts were prepared by a novel
method involving Direct Anionic Exchange (DAE). The
method produces strong bonding of the gold complex
(HAuCl4) to the alumina support with no loss of...
Preparation of a Monolith-Supported Au/TiO2 Catalyst Active for CO Oxidation
cordierite monolith gold on titania CO oxidation
2009/7/28
The development of a method for making an
adherent coating of Au/TiO2 on a cordierite monolith
is described. The optimum method entails first
forming a wash-coat of TiO2 by combining a colloidal
d...
A Novel Internally Heated Au/TiO2 Carbon-Carbon Composite Structured Reactor for Low- mperature CO Oxidation
Au/TiO2 Carbon-Carbon
2009/7/28
A compact, internally heated, catalytic reactor is
demonstrated for the low-temperature oxidation of
carbon monoxide. Carbon nanofibres were grown
on carbon felt and used as a support material for
...
Properties of TiO2 Support and the Performance of Au/TiO2 Catalyst for CO Oxidation Reaction
gold titanium dioxide carbon monoxide oxidation
2009/7/28
Gold catalysts were prepared on TiO2 supports of
different phase structures (i.e., anatase, rutile and
biphasic), TiO2 crystal size (i.e., 9-23 nm), surface
and textural properties (i.e., hydration...
An unconventional Au/TiO2 PROX system for complete removal of CO from non-reformate hydrogen
Au/TiO2 PROX system CO non-reformate hydrogen
2009/7/28
Au-based catalysts, generally known for high activity
in the selective catalytic oxidation of CO to CO2 at
ambient temperatures, can play a significant role in
increasing the fuel cell system’s CO ...
Looking by grazing incidence small angle x-ray scattering at gold nanoparticles supported on rutile TiO2(110) during CO oxidation
gold nanoparticles rutile TiO2(110)
2009/7/28
The catalytic activity of oxide-supported gold
nanoparticles depends crucially on their size. The
present work describes a dedicated set-up in which
particle size is determined by grazing incidence...