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首页> 外文会议>International Renewable Energy Congress >Interactions and interferences of Cu, Cr and As during contaminated waste wood gasification: A thermodynamic equilibrium study
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Interactions and interferences of Cu, Cr and As during contaminated waste wood gasification: A thermodynamic equilibrium study

机译：Cu，Cr和污染废木气化期间的相互作用和干扰：热力学均衡研究

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Waste wood (WW) is one of the major sources of renewable energy. However, it often contaminated with metal(loid) elements at concentrations leading to toxicity emissions and damages to facilities during thermal conversion. Thence, procedures for preventing and/or reducing the negative impacts of these elements require further understanding, specifically their phase transformations during thermal conversion processes. Although it is well known that phase transformation depends on different factors such as vaporization characteristics of elements, operational conditions and process configuration, influences of atmosphere composition of the reaction are rarely investigated. Based on thermodynamic equilibrium principles, this study investigates the behaviors of most regulated elements (Cu, Cr and As) in contaminated WW in relation to the presence/absence of Ca, Na, S, Cl, Fe and Ni during gasification. Thermodynamic calculations were performed across gasification temperature range of 0-1800°C, under the atmospheric pressure. Refinement of possible interactions and interferences reveals that Ni-As interactions generate dominant species As2Ni5and As8Ni11, which increase the solid-gaseous transformation temperature of As. Furthermore, interactions between Ca and Cr predominantly forms C3Cr7; whereas absence of Ca leads to form CnNa2O4which causes instability in Cr phase formation. The findings of this study indicate that the evaluation of speciation due to interactions and interferences can provide quantitative and qualitative assessments of the metal(loid) behavior in gasification.
机译：废木（WW）是可再生能源的主要来源之一。然而，它经常污染金属（Loid）元素，其浓度导致毒性排放和损坏热转换过程中的设施。因此，用于预防和/或减少这些元素的负面影响的程序需要进一步了解，特别是在热转换过程中的相变。众所周知，相变取决于元素的汽化特性等不同因素，操作条件和工艺构型，很少研究反应的大气组成的影响。基于热力学平衡原理，本研究研究了在气化过程中的存在/不存在CA，Na，S，Cl，Fe和Ni的污染物WW中大多数调节元素（Cu，Cr和As）的行为。在大气压下，在气化温度范围内进行热力学计算，在大气压下进行0-1800℃。可能的相互作用和干扰的细化揭示了Ni-As相互作用产生显性物种 2 你 5 并作为 8 你 11 ，增加了固体转化温度的载荷。此外，CA和CR之间的相互作用主要形成C. 3 CR. 7 ;虽然没有CA导致形成CNNA 2 O. 4 这导致Cr相形成中不稳定。该研究的结果表明，由于相互作用和干扰引起的物种评估可以为气化中的金属（LOID）行为提供定量和定性评估。

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