In the context of bioenergy with carbon capture and storage, biochars has attracted much attention because of its unique advantages, and ash content is one of the important factors affecting the quality of biochars. Therefore, this paper performed the effects of ash removal on the properties and pyrolysis biochars of PMR with deionized water and 0.1 mol L⁻¹ H₂SO₄. The results showed that water washing (WW) could remove 52.51% of ash, and ash removal rate of acid washing (AW) was up to 80.56%. AW had the highest removal efficiency of the inorganic: 94.90% of K, 88.41% of Ca, 91.25% of Na, 85.10% of Mg and 71.01% of P. TG results showed that the final residue mass of PMR (17.34 wt%) and W-PMR (12.41 wt%·min⁻¹) were higher than that of WS-PMR (9.19 wt%·min⁻¹) with the order of PMR > W-PMR > WS-PMR. In addition, AW not only changed the surface phase of biochars, but also changed the types of functional group, while WW only changed the surface phase of biochars. More importantly, the washing pretreatment has a positive effect on the pore size and adsorption performance of activated carbons (ACs).

在碳捕集与封存的生物能源背景下，生物炭以其独特的优势备受关注，灰分是影响生物炭质量的重要因素之一。^{因此，本文采用去离子水和0.1 mol L -1} H ₂ SO ₄研究了除灰对PMR性能和热解生物炭的影响。结果表明，水洗（WW）可去除52.51%的灰分，酸洗（AW）的除灰率高达80.56%。AW 对无机物的去除效率最高：94.90% 的 K、88.41% 的 Ca、91.25% 的 Na、85.10% 的 Mg 和 71.01% 的 P。TG 结果表明，PMR 的最终残渣质量（17.34 wt%）和 W-PMR (12.41 wt%·min ^-1) 高于 WS-PMR (9.19 wt%·min ^-1 )，顺序为 PMR > W-PMR > WS-PMR。此外，AW不仅改变了生物炭的表面相，还改变了官能团的类型，而WW仅改变了生物炭的表面相。更重要的是，洗涤预处理对活性炭（ACs）的孔径和吸附性能有积极影响。