竹屑氧气-水蒸气气化制备富氢燃气

doi:10.3969/j.issn.1673-5854.2023.05.006

生物质化学工程 ›› 2023, Vol. 57 ›› Issue (5): 44-50.doi: 10.3969/j.issn.1673-5854.2023.05.006

竹屑氧气-水蒸气气化制备富氢燃气

徐卫¹^,², 任菊荣¹, 应浩¹^,*(), 孙云娟¹, 许玉¹

1. 中国林业科学研究院林产化学工业研究所; 江苏省生物质能源与材料重点实验室; 国家林业和草原局林产化学工程重点实验室; 林木生物质低碳高效利用国家工程研究中心; 江苏省林业资源高效加工利用协同创新中心, 江苏南京 210042
2. 江苏强林生物能源材料有限公司, 江苏溧阳 213364

收稿日期:2023-04-10 出版日期:2023-09-30 发布日期:2023-10-07
通讯作者: 应浩 E-mail:hy2478@163.com
作者简介:应浩, 研究员, 硕士生导师, 研究领域: 生物质能转化技术开发与工业应用; E-mail: hy2478@163.com
徐卫(1989—), 男, 江苏徐州人, 工程师, 硕士, 研究方向为生物质热化学转化技术研究
基金资助:
浙江省省院合作林业科技项目(2020SY03);国家自然科学基金资助项目(51976234);江苏省生物质能源与材料重点实验室基本科研业务费(JSBEM201801)

Oxygen and Steam Gasification of Bamboo Chips for Production of Hydrogen-rich Gas

Wei XU¹^,², Jurong REN¹, Hao YING¹^,*(), Yunjuan SUN¹, Yu XU¹

1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China
2. Jiangsu Qianglin Biomass Energy and Material Co., Ltd., Liyang 213364, China

Received:2023-04-10 Online:2023-09-30 Published:2023-10-07
Contact: Hao YING E-mail:hy2478@163.com

摘要/Abstract

摘要：

以竹屑为原料, 使用氧气-水蒸气作为混合气化剂, 在固定床气化反应器中进行竹屑的氧气-水蒸气气化实验, 考察了气化温度、水蒸气流量和氧气用量比对竹屑气化制备富氢燃气的影响。研究结果表明: 气化温度和水蒸气流量均对竹屑燃气中氢气体积分数影响较大, 氢气体积分数随着气化温度的升高呈稳步增长趋势, 随水蒸气流量增加呈先增加后减少趋势, 分别在气化温度900 ℃和水蒸气流量0.7 mL/min时达到最大值; 而随着氧气用量比的增加, 氢气体积分数变化不明显。竹屑氧气-水蒸气气化制备富氢燃气最佳的气化条件为气化温度900 ℃、水蒸气流量0.7 mL/min、氧气用量比0.30, 此条件下气化制备的燃气中氢气体积分数32.04%, 热值11.37 MJ/m³, 产气率1.40 L/g, 燃气中CH₄体积分数8.82%, CO体积分数26.34%, CO₂体积分数30.55%, C₂H_m体积分数2.24%。

关键词: 竹屑, 气化, 氧气-水蒸气, 富氢燃气

Abstract:

Using oxygen and steam was mixed gasification agent, experiments were conducted on oxygen and steam gasification of bamboo chips in a fixed-bed gasification reactor. The effects of gasification temperature, steam flow rate, and O₂ equivalence ratio on gasification of bamboo sawdust for production of hydrogen-rich gas were investigated. The research results showed that both gasification temperature and steam flow rate had a significant impact on the volumetric fraction of H₂ in bamboo sawdust gas. The volumetric fraction of H₂ showed a steady growth trend with the increase of gasification temperature, and first increased and then decreased with the increase of steam flow rate.The maximum value of H₂ volume fraction was achieved at gasification temperature of 900 ℃ and steam flow rate of 0.7 mL/min, respectively. As the O₂ equivalence ratio increased, the volumetric fraction of H₂ did not changed significantly. The optimal oxygen and steam gasification conditions for preparing hydrogen-rich gas by oxygen-steam gasification from bamboo chips were gasification temperature of 900 ℃, steam flow rate of 0.7 mL/min, and O₂ equivalence ratio of 0.30. Under this condition, the volumetric fraction of H₂ in the gas produced by gasification was 32.04%, the calorific value was 11.37 MJ/m³, the gas production rate was 1.40 L/g, the volumetric fraction of CH₄ in the gas was 8.82%, the volumetric fraction of CO was 26.34%, the volumetric fraction of CO₂ was 30.55%, and the volumetric fraction of C₂H_m was 2.24%.

Key words: bamboo chips, gasification, oxygen-steam, hydrogen-rich gas

中图分类号:

TQ35

徐卫, 任菊荣, 应浩, 孙云娟, 许玉. 竹屑氧气-水蒸气气化制备富氢燃气[J]. 生物质化学工程, 2023, 57(5): 44-50.

Wei XU, Jurong REN, Hao YING, Yunjuan SUN, Yu XU. Oxygen and Steam Gasification of Bamboo Chips for Production of Hydrogen-rich Gas[J]. Biomass Chemical Engineering, 2023, 57(5): 44-50.

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参考文献 21

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反应类型 reaction type	反应式 reaction equation	焓变/(kJ·mol^-1) enthalpy change
甲烷水蒸气重整反应methane steam reforming reaction	CH₄+H₂O(g)→CO+3H₂	206.3
甲烷水蒸气重整反应methane steam reforming reaction	CH₄+2H₂O(g)→CO₂+4H₂	165
CO的变换反应CO transformation reaction	CO+H₂O(g)→CO₂+H₂	-42
CO₂的还原反应reduction reaction of CO₂	C+CO₂→2CO	173.8
焦油裂解反应tar cracking reaction	焦油tar→ aH₂+ bCH₄+ cCO+ dCO₂+ eH₂O+ fC₂H_m
水蒸气还原反应steam reduction reaction	C+H₂O(g)→CO+H₂	118.9
水蒸气还原反应steam reduction reaction	C+2H₂O(g)→CO₂+2H₂	90.2
碳氢化合物重整反应hydrocarbon reforming reaction	C ₂ H_m+4H₂O(g)→(4+ m/2)H₂+ 2CO₂
C的不完全燃烧反应the incomplete combustion reaction of C	C+0.5O₂→CO	-111
C的完全燃烧反应complete combustion reaction of C	C+O₂→CO₂	-394
CO的燃烧反应combustion reaction of CO	2CO+O₂→2CO₂	-282.6
甲烷化反应methanation reaction	C+2H₂→CH₄	-74.82
CH₄的燃烧反应combustion reaction of CH₄	CH₄+2O₂→CO₂+2H₂O	-893

气化温度/℃ temperature	燃气组分体积分数volumetric fraction of gas component/%					燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1)gas production rate
气化温度/℃ temperature	H₂	CH₄	CO	CO₂	C₂H_m	燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1)gas production rate
700	9.61	15.26	34.43	36.01	4.69	13.83	0.58
750	11.24	13.69	31.06	39.27	4.75	13.05	0.65
800	15.68	13.00	29.03	38.11	4.18	12.67	0.89
850	23.08	11.16	26.41	35.72	3.63	12.13	1.03
900	29.22	8.87	24.96	34.68	2.27	10.92	1.30

水蒸气流量/(mL·min^-1) steam flow rate	燃气组分体积分数volumetric fraction of gas component/%					燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1) gas production rate
水蒸气流量/(mL·min^-1) steam flow rate	H₂	CH₄	CO	CO₂	C₂H_m	燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1) gas production rate
0.4	30.20	8.79	24.60	34.32	2.10	11.79	1.20
0.7	30.58	9.08	26.74	31.25	2.34	11.42	1.33
1.0	30.20	8.80	25.34	33.40	2.25	11.04	1.33
1.3	30.06	8.85	24.46	34.31	2.32	10.97	1.29

氧气用量比 oxygen usage ratio	燃气组分体积分数 volumetric fraction of gas component/%					燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1) gas production rate
氧气用量比 oxygen usage ratio	H₂	CH₄	CO	CO₂	C₂H _m	燃气热值/(MJ·m^-3) Q_LHV	产气率/(L·g^-1) gas production rate
0.21	30.58	9.08	26.74	31.25	2.34	11.42	1.33
0.24	29.79	9.78	27.28	30.67	2.48	11.74	1.32
0.27	27.02	8.88	23.56	38.40	2.14	10.43	1.35
0.30	32.04	8.82	26.34	30.55	2.24	11.37	1.40
0.33	31.59	8.77	25.34	32.04	2.26	11.19	1.42

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竹屑氧气-水蒸气气化制备富氢燃气

Oxygen and Steam Gasification of Bamboo Chips for Production of Hydrogen-rich Gas

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