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Mass transfer in the absorption of SO_2 and NO_x using aqueous euchlorine scrubbing solution 被引量:7
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作者 DESHWAL Bal-Raj LEE Hyung-Keun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第2期155-161,共7页
Attempts have been made to generate euchlorine gas by chlorate-chloride process and to utilize it further to clean up SO2 and NOx from the flue gas in a lab scale bubbling reactor. Preliminary experiments were carded ... Attempts have been made to generate euchlorine gas by chlorate-chloride process and to utilize it further to clean up SO2 and NOx from the flue gas in a lab scale bubbling reactor. Preliminary experiments were carded out to determine the gas and liquid phase mass transfer coefficients and their correlation equations have been established. Simultaneous removal of SO2 and NOx from the simulated flue gas using aqueous euchlorine scrubbing solution has been investigated. Euchlorine oxidized NO into NO2 completely and the later subsequently absorbed into the scrubbing solution in the form of nitrate. SO2 removal efficiency around 100% and NOx removal efficiency around 72% were achieved under optimal conditions. Mass balance has been confirmed by analyzing the sulfate, nitrate, euchlorine and chloride ion using ion chromatograph/auto-titrator and comparing it with their corresponding calculated values. 展开更多
关键词 mass transfer sulfur dioxide nitric oxide bubbling reactor euchlorine
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邛崃石窟摩崖造像的彩绘颜料分析与研究 被引量:1
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作者 王璐 孙凤 +3 位作者 王若苏 梁雅鑫 姚雪 赵凡 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2022年第10期3198-3202,共5页
四川省邛崃市地处成都平原,是成都地区发现的摩崖造像规模最大,分布最集中的地区。由于潮湿、半露天的保存环境,造像遭到严重破坏,缺少相关的科学分析研究。本文选用邛崃地区内花置寺摩崖造像、临邛镇磐陀寺摩崖造像和大同乡石笋山摩崖... 四川省邛崃市地处成都平原,是成都地区发现的摩崖造像规模最大,分布最集中的地区。由于潮湿、半露天的保存环境,造像遭到严重破坏,缺少相关的科学分析研究。本文选用邛崃地区内花置寺摩崖造像、临邛镇磐陀寺摩崖造像和大同乡石笋山摩崖造像三处共12件彩绘颜料样品,通过超景深显微观察、X射线荧光分析、X射线衍射和显微激光拉曼光谱综合分析,获取彩绘颜料信息。结果表明红色颜料为赤铁矿[Fe_(2)O_(3)]和铅丹[Pb_(3)O_(4)];绿色颜料为砷酸铜[Cu(AsO_(3))(OH)·2H_(2)O]和过硫酸三铜钠钾[KNaCu_(3)O(SO_(4))_(3)];白色颜料为石膏[CaSO_(4)];黄色颜料为黄赭石[Fe_(2)O_(3)];黑色颜料为铅丹[Pb_(3)O_(4)]的变化产物,蓝色颜料为青金石[Na_(6)Ca_(2)Al_(6)Si_(6)O_(24)(SO_(4))_(2)]。值得注意的是绿色颜料的分析结果,其中检出的砷酸铜类物质在近年中国西南地区彩绘分析中较常见,结合文献调研判断其为近现代人工合成颜料巴黎绿的变化产物,进而推测此处有近现代重绘可能。另外,首次检出过硫酸三铜钠钾成分的绿色颜料,丰富了古代彩绘颜料的分析实例,判断可能是某种绿色含铜矿物的变化结果。四川地区环境湿润,一些不稳定的矿物颜料容易发生化学变化,有的产生变色,有的颜色变化不明显,但成分已产生新的物质。通过分析邛崃石窟彩绘颜料,获取四川地区摩崖造像所使用颜料的相关信息,为颜料复原提供科学依据,同时也有利于文物工作者展开针对性保护工作,为四川地区彩绘石窟的研究和保护提供参考。 展开更多
关键词 邛崃石窟 彩绘颜料 绿色颜料 砷酸铜 过硫酸三铜钠钾
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