Residues of leek, cabbage and cauliflower from the market places as representatives of lignocellulosic biomass were processed via hydrothermal gasification to produce energy fuel. The experiments were carried out in a batch reactor at temperatures 300, 400, 500 and 600 °C and corresponding pressures varying in the range of 7.5–43 MPa. Natural mineral additives trona, dolomite and borax were used as homogenous catalysts to determine their effects on the gasification. More than 70 wt% of carbon in vegetable residue samples were detected in the gas phase after the hydrothermal gasification process at 600 °C. The addition of trona mineral further promoted the gasification reactions and as a result, less than 5 wt% carbon remained in the solid residue at the same temperature, degrading the biomass samples into gas and liquid products. The fuel gas with the highest calorific value was recorded to be 25.6 MJ/Nm³, from the hydrothermal gasification of cabbage at 600 °C, when dolomite was used as the homogeneous catalyst. The liquid products obtained in the aqueous phase were detected as organic acids, aldehydes, ketones, furfurals and phenols. The gas products were consisted of hydrogen, carbon dioxide, methane, and as minors; carbon monoxide and low molecular weight hydrocarbons (ethane, propane, etc.). Above 500 °C, all biomass samples yielded 50–55 vol% of CH₄ and H₂ while the CO₂ composition was around 40 vol% as the gas product.

通过水热气化处理来自市场的韭菜，卷心菜和花椰菜的残留物，作为木质纤维素生物质的代表。实验是在间歇反应器中在300、400、500和600°C的温度下进行的，相应的压力在7.5–43 MPa范围内变化。天然矿物添加剂天然碱，白云石和硼砂被用作均相催化剂，以确定它们对气化的影响。在600°C的水热气化过程之后，在气相中检测到蔬菜残留样品中的碳超过70 wt％。天然碱矿物的添加进一步促进了气化反应，结果，在相同温度下，固体残余物中残留的碳少于5 wt％，从而将生物质样品降解为气体和液体产品。^{如图3所示}，当白云石用作均相催化剂时，由白菜在600℃的水热气化引起。检测到在水相中获得​​的液体产物为有机酸，醛，酮，糠醛和酚。气体产物由氢气，二氧化碳，甲烷和次要气体组成。一氧化碳和低分子量碳氢化合物（乙烷，丙烷等）。高于500°C，所有生物质样品产生的CH ₄和H ₂含量为50-55 vol％，而作为气体产物的CO ₂组成约为40 vol％。