本文選題：熱解　切入點：裂解　出處：《化工學(xué)報》2017年10期 　論文類型：期刊論文

【摘要】：為從高粱秸稈生產(chǎn)高品質(zhì)、低焦油含量生物合成氣,基于其單段熱解特性研究,借助兩段式固定床反應(yīng)器實施兩段熱解(熱解+裂解),同時考察頁巖灰對熱解揮發(fā)分的催化裂解效果。結(jié)果表明:相對單段熱解,兩段熱解強化了水蒸氣與揮發(fā)分(尤其是與熱解氣)的交互;提高裂解溫度促進(jìn)焦油裂解和重整,便利了熱解氣的生成,同時提高合成氣(H_2+CO)的產(chǎn)率和H_2/CO體積比;裂解中加入頁巖灰顯著促進(jìn)生物焦油氣化,大幅降低氣體產(chǎn)物焦油含量:裂解溫度適中(約850℃)時(450℃熱解),熱解氣產(chǎn)率超過40%(質(zhì)量),焦油產(chǎn)率低于1.0%(質(zhì)量),合成氣產(chǎn)量約186 ml·g~(-1)、體積分?jǐn)?shù)高達(dá)64%,且H_2/CO比超過0.5。頁巖灰便利H_2的生成,主要源于其鐵組分對水氣變換的催化作用。
[Abstract]:In order to produce high quality and low tar content biogenic syngas from sorghum straw, a single stage pyrolysis study was carried out. Two-stage pyrolysis (pyrolytic pyrolysis) was carried out by means of a two-stage fixed-bed reactor, and the catalytic pyrolysis effect of shale ash on pyrolysis volatiles was investigated. The two-stage pyrolysis enhanced the interaction between water vapor and volatile matter (especially pyrolysis gas), increased the pyrolysis temperature to promote the cracking and reforming of tar, facilitated the formation of pyrolytic gas, and increased the yield of H _ 2CO and the volume ratio of H _ 2 / CO to H _ 2 / CO. The addition of shale ash into the pyrolysis can significantly promote the gasification of biological tar. Significant reduction of tar content of gas products: pyrolysis at moderate pyrolysis temperature (about 850 鈩，

本文編號：1583299