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| 1 | 煤粉O_2/CO_2燃烧时PM_(2.5)及其Fe、S的生成特性显示文摘沉降炉实验研究了煤粉O2/CO2燃烧时PM2.5的生成特性和主要成灰元素中危害较大的Fe、S元素生成特性。实验用DT烟煤、NMG褐煤和XLT褐煤,实验温度1300℃,在O2/CO2=1∶9,1∶4,3∶7和O2/N2=1∶4气氛下燃烧。低压撞击器(DLPI)按不同粒径大小从0.03-9.8μm共分为13级,分别收集燃烧后的PM10。实验结果表明,O2/CO2燃烧生成的颗粒物均成三模态分布,分别存在于0.15μm附近、1.58μm附近和3μm以上;相比O2/N2,O2/CO2燃烧可有效减少PM2.5的生成,O2/CO2燃烧适当降低氧含量也可有效减少PM2.5的生成;O2/CO2燃烧方式有效地降低了PM2.5中Fe、S元素的生成浓度;Fe、S在PM2.5中总浓度均较大,超细模态和中间模态颗粒物中S的浓度均较大,中间模态中S的总浓度甚至可能大于超细模态,Fe主要存在于中间模态颗粒物中;不同煤种生成的PM2.5中S的浓度随燃烧方式和氧含量的变化呈现不同的规律。 | 温昶 徐明厚 于敦喜 周科 占中华 赵靓 姚洪 | 2011 | 化工学报2011，62，4： | 12 |
| 2 | Size distributions of major elements in residual ash particles from coal combustion显示文摘Combustion experiments for three coals of different ranks were conducted in an electrically-heated drop tube furnace. The size distributions of major elements in the residual ash particles (>0.4μm) such as Al, Si, S, P, Na, Mg, K, Ca and Fe were investigated. The experimental results showed that the con-centrations of Al and Si in the residual ash particles decreased with decreasing particle size, while the concentrations of S and P increased with decreasing particle size. No consistent size distributions were obtained for Na, Mg, K, Ca and Fe. The established deposition model accounting for trace element dis-tributions was demonstrated to be applicable to some major elements as well. The modeling results indicated that the size distributions of the refractory elements, Al and Si, were mainly influenced by the deposition of vaporized elements on particle surfaces. A dominant fraction of S and P vaporized during coal combustion. Their size distributions were determined by surface condensation, reaction or adsorption. The partitioning mechanisms of Na, Mg, K, Ca and Fe were more complex. | YU DunXi XU MingHou YAO Hong LIU XiaoWei | 2009 | Chinese Science Bulletin2009，54，6： | 4 |
| 3 | 煤粉与煤焦燃烧时颗粒物的生成特性研究显示文摘在实验室沉降炉中进行煤粉热解制焦、煤焦燃烧及煤粉燃烧实验,研究了煤焦燃烧过程对颗粒物生成的影响。研究发现,煤焦燃烧生成的PM_1和PM_(10)浓度均低于煤粉燃烧时,说明热解制焦过程对PM_1和PM_(10)生成的影响很大;随着温度由1073K升至1573K,煤焦燃烧生成PM_1浓度与煤粉燃烧生成PM_1浓度之比减小,而PM_(1-10)之比增加,表明随燃烧温度升高,矿物元素气化、细小矿物直接转化机理受抑制增大,破碎、聚合机理受抑制较小;相比原煤,中密度煤的煤焦与煤粉燃烧生成PM_1之比更小,而PM_(1-10)之比更大,其浓度比的差别主要来自于煤粉燃烧生成的PM_(10)浓度的差异。 | 温昶 徐明厚 王建培 赵靓 占中华 于敦喜 莫鑫 | 2011 | 工程热物理学报2011，32，5： | 2 |
| 4 | Physicochemical properties and potential health effects of nanoparticles from pulverized coal combustion显示文摘Nanoparticles are thought to induce more severe health impacts than larger particles. The nanoparticles from coal-fired boilers are classified into three size fractions with a 13-stage low pressure impactor. Their physicochemical properties are characterized by the high-resolution field emission scanning electron microscope and X-ray fluorescence spectrometer (XRF). The results show that coal-derived nanoparticles mainly consist of individual primary particles of 20―150 nm and their aggregates. Inor-ganic nanoparticles primarily contain ash-forming elements and their aggregates have a dense struc-ture. Organic nanoparticles are dominated by the element carbon and their aggregates have a loose structure. Nanoparticles from the same boiler have a similar composition and are primarily composed of sulfur, refractory elements and alkali/alkaline elements. Some transition and heavy metals are also detected. For different boilers, greater differences are observed in the production of the nanoparticles and their composition, possibly due to the use of low-NOx burners. Coal-derived nanoparticles have a small size, large specific surface area and complicated chemical composition, and thus are potentially more harmful to human health. | YU DunXi XU MingHou YAO Hong LIU XiaoWei ZHOU Ke WEN Chang LI Lin | 2009 | Chinese Science Bulletin2009，54，7： | 1 |
| 5 | 氧/燃料燃烧条件下高钙煤灰的碳酸盐化研究显示文摘利用水平管式炉对两种高钙煤灰在氧/燃料燃烧条件下的碳酸盐化特性进行了研究,重点探究了H_2O和SO_2浓度对煤灰碳酸盐化反应的影响规律,并利用HSC Chemistry对实验现象进行了合理解释。研究结果表明,在无SO_2的情况下,H_2O的存在促进了煤灰的碳酸盐化反应,且碳酸盐化程度随H_2O浓度的增大而增大;在相同H_2O浓度下,SO_2的加入对煤灰的碳酸盐化反应具有强烈抑制作用,且H_2O浓度越高,这种抑制作用越明显;同时,SO_2存在条件下,煤灰中Ca的反应程度明显降低。 | 项辰 于敦喜 王翱 徐明厚 姚洪 | 2015 | 工程热物理学报2015，36，6： | 0 |
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