炭素含有廃棄物における炭素ガス化モードのエネルギー的実証

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:炭素ガス化経路の熱力学的比較指標（KTSS、qnet）の統一フレームを提供する。

🏢実務担当者:廃棄物ガス化設備の運転温度・圧力選定の初期設計判断に活用できる。

🏛政策担当者:産業廃棄物由来の合成ガス・水素供給ポテンシャル評価の基礎資料となりうる。

Purpose. The research aims to theoretically substantiate the energy-efficient gasification modes of carbon component in carbon-containing waste based on unified thermal self-sufficiency indicators, using coal mining waste as a basic example for model application. Methods. Comparative material and thermal calculations for four idealized carbon conversion routes within the 660-1000°C temperature range were performed based on previously determined equilibrium constants. All specific indicators refer to 1 kg of initial C. The basic comparison was conducted at an absolute pressure of about 0.2533 MPa. The influence of pressure was investigated for steam and CO2-gasification within the 0.1013-1.0133 MPa. The comparison of heat requirement qreq, resource qres, difference qnet = qres – qreq, the coefficient of potential heat coverage KTSS and the lower heating value of the gas was performed taking into account the residual steam. Findings. At pabs = 0.2533 MPa for C + H2O ↔ CO + H2, thermal self-sufficiency coefficient for endothermic processes reaches 2.17 at 860°C, 2.19 at 960°C and slightly decreases to 2.187 at 1000°C. For C + CO2 ↔ 2CO, it grows to 2.35 at 1000°C. Incomplete air oxidation provides the highest qnet, however, the lower heating value of the product gas (LHVg) remains stable low in the entire examined temperature range of 4.39 MJ/nm3 due to the dilution of combustible gases with air nitrogen (N2). Increasing pabs from 0.1013 to 1.0133 MPa worsens the equilibrium values of steam and carbon dioxide conversions. Originality. On the joint basis of 1 kg of initial C, the temperature dependences of the energy potential and heat requirement of idealized gasification routes are quantified. A single system qreq – qres – qnet – KTSS is proposed for a correct comparison of exo- and endothermic carbon gasification routes. It is shown that the advantage of the route depends on the chosen criterion: H2 yield, CO formation, volumetric heating value or potential thermal self-sufficiency. The relationship between pressure influence, equilibrium conversion and dilution of the product gas is clarified. Practical implications. The criteria for pre-selection of the route are proposed, based on the intended use of gas and available heat resources. For steam gasification at the base pressure, the initial test range of 860-900°C is recommended; for target production of CO in the presence of high-temperature heat – CO2-conversion in the 900-1000°C range is recommended. For the hydrogen product, it is advisable to combine steam gasification with water-gas shift reaction, and for the autothermal scheme – to determine the share of oxidant introduced into the system.

• openalex https://doi.org/10.33271/mining20.03.146first seen 2026-09-28 05:21:45