燃料化学学报Issue(8)：955-960,6.
O2/CO2气氛下稻秆添加磷酸二氢铵对固钾及灰熔融特性的研究
Influence of ammonium dihydrogen phosphates additive on potassium fixation capacity and ash fusibility for rice straw combustion in an O2/CO2 atmosphere
摘要
Abstract
Particle agglomeration, fouling on the heating surface and other issues are closely related to the alkali metals during biomass thermo-chemical conversion. The potassium fixation ability and ash fusing characteristics in the combustion of rice straw ( RS) added with ammonium dihydrogen phosphate ( NH4 H2 PO4 ) were studied in a 21%O2/79%CO2 atmosphere. The reaction residue from the experiment in a drop tube furnace was analyzed with inductively coupled plasma atomic emission spectrometer ( ICP-AES ) , X-ray diffraction ( XRD ) and scanning electron microscopy ( SEM) . The potassium retention ratio of co-combustion of RS and NH4 H2 PO4 is higher than that of RS alone, especially at 900℃, and the retention ratio increases from 14. 65% to 68. 79%. The reaction between NH4 H2 PO4 and alkali metals in rice straw leads to the formation of KPO3 at 700 ℃ and K2 CaP2 O7 at 900 ℃, which is a high melting point compound. SEM analysis on residue indicates the agglomeration is inhibited, and the ash fusion temperature of RS is increased by adding NH4 H2 PO4 . These results can be helpful to the research and development of high-alkali biomass clean utilization process.关键词
生物质/O2/CO2 燃烧/磷酸二氢铵/碱金属Key words
biomass/O2/CO2 combustion/ammonium dihydrogen phosphate/alkali metals分类
能源科技引用本文复制引用
..O2/CO2气氛下稻秆添加磷酸二氢铵对固钾及灰熔融特性的研究[J].燃料化学学报,2015,(8):955-960,6.基金项目
国家自然科学基金(51206096) （51206096）
济南高校自主创新基金(201401275)。 （201401275）
