Effect of Alkali and Alkaline Earth Metals on the Reactivity of BiomassChar in Pressurized Gasification

CHEN Hui; FANG Yaxiong; ZHANG Qiang; WANG Xiujun; YU Jie

doi:10.19805/j.cnki.jcspe.2026.240705

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Effect of Alkali and Alkaline Earth Metals on the Reactivity of BiomassChar in Pressurized Gasification

更新时间：2026-10-10

- Effect of Alkali and Alkaline Earth Metals on the Reactivity of BiomassChar in Pressurized Gasification
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 139-145(2026)
- 作者机构：
  
  1. 国能南京电力试验研究有限公司,江苏,南京,210046
  2. 华中科技大学煤燃烧与低碳利用全国重点实验室,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240705
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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陈辉,方亚雄,张强,王秀军,于洁. 碱/碱土金属对生物质炭加压气化反应性影响研究动力工程学报, 2026, 46(2): 139-145 https://doi.

org/10.19805/j.cnki.jcspe.2026.240705
陈辉,方亚雄,张强,王秀军,于洁. 碱/碱土金属对生物质炭加压气化反应性影响研究动力工程学报, 2026, 46(2): 139-145 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240705.

org/10.19805/j.cnki.jcspe.2026.240705 DOI：

摘要

为了掌握在加压条件下碱/碱土金属对生物质炭气化反应性的影响

以在800 ℃下热解制备的生物质炭为研究对象

分别用去离子水和稀盐酸溶液对该热解生物质进行预处理

在不同气化剂、温度及压力条件下

在金属丝网加压反应器中针对原始生物质炭及2种预处理样品进行了气化研究。结果表明:水洗后的样品中大部分钾和部分钙镁可以被脱除

在酸洗后的生物质炭样品中没有检测到碱/碱土金属;在850 ℃时

气化反应性不受压力影响

而在1 000 ℃时压力对气化反应性具有促进作用;水溶性的钾和钙显著增强了CO

和水蒸气的气化反应性

且其催化作用在高温下得到增强

水不溶性的钙仅略微提高了气化反应性;在850 ℃下

所有样品的CO

分压反应级数接近0

在1 000 ℃时反应级数大于0。

Abstract

To understand the effect of alkali and alkaline earth metals on the gasification reactivity of biomass char under pressurized conditions

the biomass char prepared by pyrolysis at 800 ℃ was used as the research object. The pyrolyzed biomass was pre-treated with deionized water and dilute hydrochloric acid solution

respectively. Gasification study was conducted on the raw biomass char and the two pre-treated samples in a wire-mesh pressurized reactor under various gasification agents

temperatures

and pressures. Results show that most of the potassium and some of the calcium and magnesium can be removed from the water-washed samples

while no alkali and alkaline earth metals are detected in the acid-washed biomass char sampl

e. At 850 ℃

the gasification reactivity is not affected by pressure

whereas at 1 000 ℃

pressure has a promotional effect on gasification reactivity. Water-soluble potassium and calcium significantly enhance the gasification reactivity with both CO

and steam

and their catalytic effects are enhanced at high temperatures. The water-insoluble calcium only slightly increases the gasification reactivity. At 850 ℃

the reaction orders with respect to CO

partial pressure are close to 0 for all samples

while at 1 000 ℃

the reaction order is greater than 0.

关键词

Keywords

references

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