Research progress in n(H2)/n(CO)regulation technology of syngas for low-carbon chemical industry
GU Cheng
LIU Yuxin
ZHANG Jinpeng
JING Jieying
LI Wenying
Abstract：Precise regulation of the hydrogen-to-carbon ratio(n(H2)/n(CO))in syngas is a key factor for the efficient preparation of high-value-added chemicals and represents one of the core technologies for the low-carbon transition of the coal chemical industry and related processes.It directly determines the production efficiency,energy consumption,and carbon emissions of downstream synthesis processes.Although the conventional Water-Gas Shift(WGS)reaction is the most commonly used method for n(H2)/n(CO)adjustment,it is constrained by thermodynamic equilibrium and catalyst stability,and inevitably generates additional CO2 during the reaction process.To break through the limitations of traditional n(H2)/n(CO)regulation processes,this review elaborates on regulation strategies from a diversified perspective:the introduction of exogenous hydrogen enables rapid and precise n(H2)/n(CO)adjustment,but its large-scale application is still limited by hydrogen production costs and infrastructure construction;emerging short-process catalytic technologies(such as CO2 electrocatalysis and photocatalysis)can directly generate syngas with customized n(H2)/n(CO)during the reaction,yet their current production yields do not match industrial-scale demand;process intensification and system coupling(including multi-reforming coupling,Sorption-Enhanced Water-Gas Shift,membrane reactor coupling,biomass gasification integrated with SEWGS and the reverse Boudouard reaction,and co-gasification)achieve synergy between syngas production,n(H2)/n(CO)regulation,energy efficiency enhancement,and carbon emission reduction through multi-reaction synergy,in-situ product removal,reaction path integration,and feedstock complementarity.Overall analysis reveals that syngas n(H2)/n(CO)regulation technology is shifting from"unit optimization"toward"systematic integrated coordination and optimization,"providing support for building a low-carbon,short-process,and highly flexible green syngas production and utilization platform,which is of great significance for achieving China's carbon peaking and carbon neutrality goals.
Keywords：syngasn(H2)/n(CO)water-gas shift reactionprocess intensificationlow-carbon transformation
Publication Date：2026-01-31
Online Publishing Date：2026-03-20(First online date of this platform, not the publication date of the document)
Pages：17( 245-261 )