PDF《松木屑超临界水气化制甲烷产气性能试验》

林业工程学报, 2016,1(4):96-101 Journal of Forestry Engineering Doi:10.

13360/ j.issn.2096-1359.2016.04.016 收稿日期:2015-10-12 修回日期:2016-03-27 基金项目:国家科技支撑计划课题(2014BAJ01B00,2014BAJ01B06). 作者简介:刘理力,男,研究方向为生物质超临界水气化技术研究. 通信作者:廖传华,男,教授. E?mail:lch@ njut.edu.cn 松木屑超临界水气化制甲烷产气性能试验 刘理力 ,廖传华? ,陈海军,朱跃钊 (南京工业大学机械与动力工程学院,南京 211816) 摘要:以松木屑为试验原料,在自行设计的间歇式高温高压反应釜中进行超临界水气化制甲烷的实验. 考查 了反应温度、反应压力、松木屑浆料质量分数、粒径以及

4 种常用碱性催化剂和

4 种常用金属催化剂对松木屑在 超临界水中气化制甲烷效果的影响. 结果表明,反应温度对甲烷产量有重要影响,450 ℃ 时甲烷产量最高;

反应 压力的升高能促进松木屑气化,使甲烷产量变高;

高质量分数的松木屑浆料不利于气化制甲烷,粒径对于甲烷产 量和气化效率没有明显影响. 在反应温度

450 ℃ 、压力

34 MPa,松木屑质量分数 5%、粒径 4? 75~ 8?

00 mm 条件 下碱性催化剂对甲烷产量的影响顺序为 KOH>

K2 CO3 >

Na2 CO3 >

Ca(OH)2 ,金属催化剂对甲烷产量的影响顺序为 Ni>

Co>

Fe>

Cu.

8 种催化剂中 KOH 效果最好,甲烷的摩尔分数、产量以及气化效率分别达到了 38? 5%,13?

7 mol/ kg 和84? 7%,所得可燃气体的热值达到

14 248.04 kJ/ kg. 这些工作为生物质超临界水气化制甲烷的制备工 艺完善和工程放大奠定了一定的实验基础. 关键词:松木屑;

超临界水;

气化;

甲烷 中图分类号:TK6 文献标志码:A 文章编号:2096-1359(2016)04-0096-06 Experimental study on the methane production by gasification of pine sawdust in supercritical water LIU Lili, LIAO Chuanhua? , CHEN Haijun, ZHU Yuezhao (College of Machanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China) Abstract: Supercritical water gasification (SCWG) of biomass is a high efficiency and environmentally friendly energy conversion technology. Given the abundant biomass resource in China, SCWG could probably become one effective way of biomass gasification because wet biomass could be gasified directly in supercritical water. Pine sawdust was selected for the gasification in supercritical water using a self?designed batch tank reactor for methane production. The effects of gasification temperature, pressure, mass ratio of sawdust slurry, particle size of pine sawdust, and

4 basic alkaline cata? lysts and

4 basic metal catalysts on the methane production were investigated. Experimental results indicated that the gas? ification temperature had significant effect on the efficiency of methane production. The efficiency of gasification increased with the increasing temperature, and the highest gas yield of methane could be obtained at

450 ℃ . The in? crease of pressure promoted the gasification reaction and improved the gas yield of methane. However, big mass ratio of pine sawdust slurry was not suitable for methane production. The particle size of sawdust had no obvious effect on the gasification efficiency and methane production. The yield of CH4 with

4 alkali catalysts from high to low order was KOH>

K2 CO3 >

Na2 CO3 >

Ca(OH)2 when other reaction conditions were set as the following: temperature

450 ℃ , pressure