Influence of Ammonium Phosphates on Gaseous Potassium Release and Ash-Forming Characteristics during Combustion of Biomass
Influence of Ammonium Phosphates on Gaseous Potassium Release and Ash-Forming Characteristics during Combustion of Biomass
复制标题
磷酸铵对生物质燃烧过程中气态钾释放和成灰特性的影响
DOI：
10.1021/acs.energyfuels.5b00285
复制
发表时间：
2015-04-01
期刊：
影响因子：
5.3
通讯作者：
Lu, Chunmei
中科院分区：
文献类型：
--
作者：
Li, Hui;Han, Kuihua;Lu, Chunmei
磷酸铵的影响，即，在管式炉中研究了磷酸二氢铵（NH 4 H2 PO 4）和磷酸氢二铵（（NH 4）2 HPO 4）对玉米秸秆（MS）、棉秆（CS）和稻草（RS）燃烧过程中气态钾（K）释放的影响。用去离子水吸收气态钾，用原子吸收光谱法（AAS）测定。使用粉末X射线衍射（XRD）和扫描电子显微镜结合能量色散X射线光谱（SEM-EDS）分析的组合在视觉评估后研究形成的灰分。结果表明，NH 4 H2 PO 4和（NH 4）2 HPO 4的加入均降低了钾的释放率，且二者的变化趋势相同。NH_4H_2PO_4和（NH_4）_2HPO_4对土壤钾素的吸收效果较好。在1000 °C时，NH_4H_2PO_4和（NH_4）_2HPO_4对RS的释放率分别为12.1%和13.2%，均比RS的释放率降低最多。释放率随PO 43-/K比值的增大而减小。
The influence of ammonium phosphates, i.e., ammonium dihydrogen phosphate (NH4H2PO4) and ammonium monohydric phosphate [(NH4)2HPO4], on gaseous potassium (K) release was studied in a tube furnace during the combustion of maize straw (MS), cotton stalk (CS), and rice straw (RS). The gaseous potassium was absorbed by deionized water and measured by atomic absorption spectroscopy (AAS). The formed ashes were investigated using a combination of powder X-ray diffraction (XRD) and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM–EDS) analyses after visual evaluation. The results show that the addition of NH4H2PO4 and (NH4)2HPO4 both decrease the potassium release ratio and show the same trends. NH4H2PO4 and (NH4)2HPO4 can be more effective with a higher initial potassium content. The release ratios of RS with NH4H2PO4 and (NH4)2HPO4 are 12.1 and 13.2% at 1000 °C, respectively, which both decrease most compared to the ratio of RS. The release ratio decreases as the PO43–/K rat...