Simultaneous Steam Reforming of Tar and Steam Gasification of Char from the Pyrolysis of Potassium-Loaded Woody Biomass
Simultaneous Steam Reforming of Tar and Steam Gasification of Char from the Pyrolysis of Potassium-Loaded Woody Biomass
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DOI：
10.1021/ef201166a
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发表时间：
2012-01
期刊：
影响因子：
5.3
通讯作者：
Tsukasa Sueyasu;Tomoyuki Oike;Aska Mori;Shinji Kudo;K. Norinaga;J. Hayashi
中科院分区：
文献类型：
--
作者：
Tsukasa Sueyasu;Tomoyuki Oike;Aska Mori;Shinji Kudo;K. Norinaga;J. Hayashi
本文提出了生物质制气的两阶段转化，即500-600℃的热解和600-700℃的蒸汽重整/气化，并具有钾(K)催化剂循环利用的特点。以载k雪松为原料，以其热解后的炭为催化剂，模拟了该工艺。热解产生的焦油在煤焦上进行重整，碳沉积到孔隙表面，k催化煤焦气化，同时k催化煤焦气化产生活性孔隙。在蒸汽/碳摩尔比为0.55 ~ 1.10的条件下，K的催化作用同时实现了产物气中重焦油（沸点温度> ~ 336℃）浓度低至20 mg m3N的干燥，炭气化过程与热解成焦过程一样快。产品气体中氢气的浓度超过50 vol % dry。一部分K从热解过程中释放出来。
This paper proposes a two-stage conversion of biomass into gas, which consists of pyrolysis at 500–600 °C and steam reforming/gasification at 600–700 °C, and has a special feature of recycling of the potassium (K) catalyst. The proposed process was simulated experimentally employing K-loaded cedar as the feedstock and char from its pyrolysis as the catalyst for tar reforming. Tar from the pyrolysis was reformed over the char in a sequence of carbon deposition onto the pore surface and K-catalyzed steam gasification of the deposit, while K-catalyzed char gasification created active pores simultaneously. At the steam/carbon molar ratio of 0.55–1.10, the catalysis of K simultaneously realized the concentration of heavy tar (boiling point temperature > 336 °C) in the product gas as low as 20 mg m3N dry and progress of the char gasification as fast as that of char formation by the pyrolysis. The concentration of hydrogen in the product gas exceeded 50 vol % dry. A portion of K was released from the pyrolyzing ...