欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
将原煤通过三步化学提取实验（水洗，NH3OAc洗，HCl洗），然后通过浸溶实验（Impregnation Experiment），将煤中羧基（-COOH）中的H离子置换成Na离子。并将原煤、提取实验后煤和浸溶实验后的三种煤样在沉降炉中热解和燃烧，研究煤中钠的有机／无机赋存形态对其气化特征和亚微米颗粒物形成的影响。实验结果发现：提取实验后的煤样，Na元素大部分以硅酸盐形式存在，两种煤在沉降炉中的热解结果表明以硅酸盐形式存在于煤中的钠元素很难气化。浸溶实验后的煤样中，Na元素大部分以羧酸（COO-Na）的形式存在，两种煤在沉降炉中的热解实验结果表明以有机结合态存在于煤中的钠元素非常易气化。Na元素赋存形态对其燃烧过程中气化有重要影响，最终表现在亚微米颗粒物中的含量上。
英文摘要：
Chemical fractionation was used to selectively extract elements from the raw coal based on solubility （water, ammonium acetate and hydrochloric acid）, and reflects their association in the coal. The residue was an H-form coal sample. Then an impregnation experiment of H-form coal used to change Na＋ cations through ion-exchange process in coal matrix was carried out. The residue was a Na-form coal sample. Finally, the raw coal, H-form coal and Na-form coal samples were pyrolyzed and combusted in the drop tube furnace. The experimental results indicate that, in the H-form coal, the presence of element Na was mostly associated with inorganic silicate mineral species and this form of Na was difficult to be vapored during coal pyrolysis and combustion. In the Na-form coal, the presence of element Na was mostly associated with organic carbon matrix and this form of Na was easy to be vapored during coal pyrolysis and combustion. The submicron ash particles were formed with the vaporization and condensation. Hence, the occurrence mode of Na in coal was greatly influenced submicron ash particle formation.
同期刊论文项目
同项目期刊论文
The effects of coal blending on the formation and properties of particulate matter during combustion
Combustion Modeling of Blended Coal in a 300MW Tangentially-firing Boiler with a Three-mixture-fract
An Improved Petrov-Galerkin Spectral Collocation Solution for Linear Stability of Circular Jet, CMES
A Special Issue on 2009 Sino-Australian Symposium on Advanced Coal and Biomass Utilisation Technolog
An economic feasibility study of O2/CO2 recycle combustion technology based on existing coal-fired p
Relationship between nitrogenous species in coals and volatile nitrogen-containing yields during pyr
An investigation of the causes of the difference in coal particle ignition temperature between combu
Effect of cellulose, lignin, alkali and alkaline earth metallic species on biomass pyrolysis and gas
Physical quantity synergy in the field of turbulent heat transfer and its analysis for heat transfer
The effects of coal blending on the formation and properties of particulate matter during combustion
The Solution of Transient Riadative Transfer with Collimated Incident Serial Pulse in a Plane-Parall
Optimization of combustion based on introducing radiant energy signal in pulverized coal-fired boile
A compact optimization strategy for combustion in a 125 MW tangentially anthracite-fired boiler by a
Volatilization behavior of Cd and Zn based on continuous emission measurement of flue gas from labor
Numerical simulations of the slagging characteristics in a down-fired, pulverized-coal boiler furnac
A pilot scale study on co-capture of SO2 and NOx in O-2/CO2 recycled coal combustion and techno-econ
Pyrolysis of maize stalk on the characterization of chars formed under different devolatilization co
Effects of Indigenous and Added Minerals on Transformation of Organic and Inorganic Sulfur in Densit
Mineralogy and chemical composition of high calcium fly ashes and density fractions from a coal-fire
Study of flow mechanism and heat transfer enhancement in longitudinal-flow tube bundle of shell-and-
The Formation and Emission of Particulate Matter during the Combustion of Density Separated Coal Fra
An efficient solution for linear stability of circular jet: A combination of Petrov-Galerkin spectra
Physical quantity synergy in laminar flow field of convective heat transfer and analysis of heat tra
期刊信息
位置：