白云石
合成气
吸附剂
产量(工程)
菱镁矿
化学工程
甲烷化
化学
矿物学
材料科学
催化作用
废物管理
冶金
工程类
吸附
物理化学
有机化学
镁
作者
Xiao Ma,Hongjie Cui,Zhenmin Cheng,Zhi Zhou
摘要
Abstract Integrated CO 2 capture and conversion (ICCC) is a promising technology aiming at converting waste CO 2 to fuels and high value‐added chemicals. Herein, we described a proof‐of‐concept study of applying engineered natural ores (dolomite, magnesite, and limestone) to two different ICCC processes—intermediate‐temperature ICCC for CH 4 production (350–400°C) and high‐temperature ICCC for syngas production (650–700°C). In the former process, a MgO‐based CO 2 sorbent prepared from dolomite and magnesite was combined with a methanation catalyst in a dual‐bed configuration, whereby a CH 4 yield of 7.1–7.3 mmol/g can be stably achieved per cycle over 20 consecutive ICCC cycles. In the latter process, a CaO‐based sorbent derived from dolomite and limestone was coupled with a reforming catalyst also in a dual‐bed mode, whereby syngas with a H 2 /CO ratio of 0.9–1.0 can be produced over 20 cycles. This study will expand the application of natural ores in CO 2 emission reduction.
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