Preparation method of metal ion-loaded modified straw charcoal biogas desulfurizing agent

• Main Authors: PEI ZHANJIANG, LIU JIE, GAO YABING, LU BINYU, WANG SU, SHI FENGMEI
• Format: Patent
• Language: Chinese; English
• Published: 18.08.2017
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSEGASES [GHG]; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a preparation method of metal ion-loaded modified straw charcoal biogas desulfurizing agent, and belongs to the field of the biogas purification. A to-be-solved problem is that the existing biogas H2S removal technology has the defects of poor desulfurizing effect and high desulfurizing cost. The method comprises the following steps: smashing the dried crop straws, preparing charcoal by use of the smashed crop straws through the dipping of the sulfuric acid solution, and then modifying the charcoal by use of the KOH solution, and finally, dipping the modified straw charcoal in an aqueous solution containing Mg<2+>, Zn<2+>, Cu<2+>, Ag<+> and Ni<+>, roasting in the N2 atmosphere, cooling to obtain the metal ion-loaded modified straw charcoal biogas desulfurizing agent. 种负载金属离子的改性秸秆生物炭沼气脱硫剂的制备方法，属于沼气净化领域。所要解决的问题是现有沼气脱除HS技术中存在的脱硫效果差，脱硫成本高的缺点。所述方法为将干燥的农作物秸秆粉碎，将粉碎的农作物秸秆通过硫酸溶液浸渍制备生物炭，然后用KOH溶液对生物炭进行改性，最后将改性秸秆生物炭用含Mg、Zn、Cu、Ag、Ni的水溶液中浸渍，再在N气氛中焙烧，冷却后即可得到负载金属离子的改性秸秆生物炭沼气脱硫剂。