文献类型：期刊文献

中文题名：发酵残渣与废纸共热解:二氧化碳气氛中碱及碱土金属催化机制

英文题名：Co-pyrolysis of fermentation residues and waste paper:Catalytic mechanism of alkali and alkaline earth metals in CO_(2)atmosphere

作者：胡龙昆[1,2];岳成燕[1];唐龙飞[1,2];丁路[1,2];高宇泽[1];陈雪莉[1,2];于广锁[1,2];王辅臣[1,2]

机构：[1]华东理工大学洁净煤技术研究所,上海200237;[2]华东理工大学含碳废弃物资源化零碳利用教育部工程研究中心,上海200237

年份：2026

卷号：45

期号：1

起止页码：555

中文期刊名：化工进展

外文期刊名：Chemical Industry and Engineering Progress

收录：;EI(收录号：20262621020481);北大核心:【北大核心2023】；

基金：国家重点研发计划(2022YFC3902404)。

语种：中文

中文关键词：发酵残渣;废纸;共热解;碱及碱土金属;协同作用

外文关键词：fermentation residues;waste paper;co-pyrolysis;alkali and alkaline earth metals;synergistic effect

摘要：不同生物质共热解具有协同作用,可以调控热解产物分布及组成,改善热解产物品质。而碱及碱土金属(AAEMs)在热解过程中具有催化作用,促进生物质热裂解反应。本文采用固定床热解,考察了CO_(2)气氛下发酵残渣和废纸共热解特性以及AAEMs赋存规律变化,研究了不同CO_(2)浓度中AAEMs的催化作用机制。结果表明,在热解温度为700℃、CO_(2)体积分数为20%时,热解焦炭产率降低13.94%,热解气产率提高45.01%,焦油产率降低11.72%,热解气热值提高20.54%;CO_(2)体积分数为40%时,热解焦炭和焦油产率进一步降低,热解气产率和热值进一步提高。热解温度为700℃、CO_(2)体积分数为20%时,共热解焦炭中钾的浓度达到最大值20.87mg/g,钙的浓度升高2.37%,部分有机态AAEMs转化为水溶态,促进了热解焦油在焦炭表面发生裂解,导致焦油中大分子化合物向小分子化合物转变,同时促进了脱氢、脱羧和脱挥发分,导致热解焦炭孔隙数量增多。
Synergistic effects exist during the co-pyrolysis of different biomasses,which can regulate the distribution and composition of pyrolysis products and improve the quality of pyrolysis products.Alkali and alkaline earth metals(AAEMs)have a catalytic effect during the pyrolysis process,promoting the pyrolysis reaction of biomass.In this study,fixed-bed pyrolysis was used to investigate the co-pyrolysis characteristics of fermentation residues and waste paper under a CO_(2)atmosphere and the changes in the occurrence patterns of AAEMs.The catalytic mechanism of AAEMs at different CO_(2)concentrations was studied.The results showed that when the pyrolysis temperature was 700C and the CO_(2)concentration was 20%,the pyrolytic char yield decreased by 13.94%,the pyrolysis gas yield increased by 45.01%,the tar yield decreased by 11.72%,and the calorific value of the pyrolysis gas increased by 20.54%.When the CO_(2)concentration was 40%,the yields of pyrolytic char and tar decreased further,and the yield and calorific value of the pyrolysis gas increased further.When the CO_(2)concentration was 20%,the potassium concentration in the pyrolytic semi-char reached a maximum of 20.87mg/g,the calcium concentration increased by 2.37%,and some of the organic-bound AAEMs were transformed into water-soluble forms.This promoted the cracking of pyrolysis tar on the surface of the semi-char,leading to the transformation of macromolecular compounds in the tar into small-molecular compounds.At the same time,it promoted dehydrogenation,decarboxylation,and devolatilization,resulting in an increase in the number of pores in the pyrolytic char.